Benutzeranleitung / Produktwartung 1987 des Produzenten AT&T
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555-520-200 Issue 1, June 1987 AT&T System 25 Reference Manual.
© 1987 AT&T All Rights Reserved Printed in USA TO ORDER COPIES OF THIS DOCUMENT REFER TO DOCUMENT NUMBER 555-520-200. Contact: Your AT&T sales representative or Call: 800-432-6600, Monday to Friday between 7:30 am and 6:00 EST, or Write: AT&T Customer Information Center 2855 North Franklin Road P.
FCC NOTIFICATION AND REPAIR INFORMATION AT&T SYSTEM 25 This telephone equipment is registered with the Federal Communications Commission (FCC) in accordance with Part 68 of its Rules.
RIGHTS OF THE TELEPHONE COMPANY If your telephone equipment causes harm to the telephone network, the telephone company may discontinue your service temporarily. If possible, they will notify you in advance. But if advance notice isn’t practical, you will be notified as soon as possible.
FCC WARNING STATEMENT Federal Communications Commission (FCC) Rules require that you be notified of the following: ● This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause interference to radio communications.
CONTENTS SECTION l—OVERVIEW SECTION 2—FEATURES AND SERVICES SECTION 3—FUNCTIONAL DESCRIPTION SECTION 4—HARDWARE DESCRIPTION SECTION 5—TECHNICAL SPECIFICATIONS SECTION 6—ENVIRONMENTAL REQUI.
SECTION 1—OVERVIEW This reference manual provides general technical information on AT&T System 25 (System 25). It includes a description of the system, its hardware and software, features and services, environmental requirements, and technical specifications.
System 25 Description System 25 (Figure l-l) is an advanced digital switching system that integrates voice and data communications. It not only provides the features of a state-of-the-art PBX, but goes a step further by allowing data to be switched point-to-point without first being converted to analog format.
DIGITAL SWITCH EMERGENCY TRANSFER -48V DC UNIT UNIT SINGLE-LINE ANALOG VOICE TERMINALS MULTILINE VOICE HYBRID TERMINALS DIRECT TRUNK ATTENDANT CONSOLE OR HYBRID ASYNCHRONOUS DATA RS-232C DAT A HOST CO.
Call Handling Capabilities System 25 can be arranged as a stand-alone system or can be part of a private network. The system provides 256 ports to support the following: ● 115 simultaneous two-party.
Incoming Business Communications Successful call termination is the key to capturing all incoming communications associated with revenue issues, client inquiries, decision data, etc. Call termination involves identifying the called party and routing the call to a primary or secondary answering position.
supported by secretarial service and equipped with economical single-line phones. When alternate resources are not available to handle an incoming call, System 25 provides for attendant handling of the call utilizing camp-on, redirection and/or message service.
Ease of access to multiple types of network facilities (provided for minimum cost) is managed by: ● Automatic Route Selection (ARS) allows the customer to dial a standard DDD number. ARS selects the preferred route and does any number conversions required for the facilities selected.
● Automatic Intercom allows multiline voice terminal users to call each other by use of a dedicated line appearance. A private dedicated path ensures that a path is always available.
● Circuit switched data communications up to 19,200 bps (RS232 interface). This provides circuit switched connections from asynchronous data terminals, PCs, or host computers to host computers or network facilities. Users can be located and/or moved to any on-premises office equipped with the standard AT&T four-pair wiring plan.
● Terminal Dialing provides the user with fast access to data communications via keyboard dialing at a terminal or PC. ● Command Mode provides a menu of data services supporting terminal dialing, and display and control of user data port options. A user friendly Change Options menu is provided for user administration of data options.
Figures 1 and 2.) Every circuit slot in the system can be used for trunk cards or voice/data station cards. All these attributes allow the client to add future capability without breakage and re-engineering of existing equipment. Thus, the client is able to minimize initial investment while not restricting future growth.
Types of trunks which can be assigned in System 25 are: ● Central Office, which provide a link with the local telco for incoming and outgoing calls (LS/GS) ● Foreign Exchange (FX), which connect t.
USER CHANGEABLE OPTIONS (V2) . . . . . . . . . . . . . VIRTUAL FACILITIES (V2) . . . . . . . ● . . . . ● . . ● ● LIST OF FIGURES Figure 2-1. Direct Trunk Attendant Console . . . . . . . . . . . . . . Figure 2-2. Direct Trunk Attendant Console Connections .
Figure 2-26. Figure 2-27. Figure 2-28. Figure 2-29. Figure 2-30. Figure 2-31. Figure 2-32. Figure 2-33. Figure 2-34. Figure 2-35. Figure 2-36. Figure 2-37. Figure 2-38. Figure 2-39. Figure 2-40. Figure 2-41. Figure 2-42. Figure 2-43. Figure 2-44. Figure 2-45.
TABLE 2-A. System Features . . . . . . . . . . . . . . . . . . . TABLE 2-B. Network Features . . . . . . . . . . . . . . . . . . TABLE 2-C. Data Features.. . . . . . . . . . . . . . . . . . . TABLE 2-D. Station Features . . . . . . . . . . . . . . . .
SECTION 2—FEATURES AND SERVICES This section describes the System Features, Network Features, Data Features, Station Features, and Attendant Features of AT&T System 25.
System Features System features (Table 2-A) are those that affect the entire operation of the system. All system features are available with both Vl and V2.
Network Features This group of features (Table 2-B) supports communications with the public network and with other locations in the private network of which System 25 can be a part.
Station Features The many Station Features (Table 2-D) available allow individual user needs to be met. As these needs change, assigned features can also be changed. Station Features provide many important services that help save time and make calling more convenient.
Attendant Features Attendant Features (Table 2-E) are available to the attendant using the Direct Trunk Attendant Console (DTAC) or the Switched Loop Attendant Console (SLAC) (V2 only) and (optionally) a Direct Extension Selector Console. In addition, most multiline voice terminal station features are available to the attendant.
ACCOUNT CODE ENTRY Description Allows voice terminal users to associate an account code with incoming and outgoing calls. This is accomplished by entering the account code at the voice terminal before hanging up. The account code is appended to the SMDR call record and can be used later for accounting or billing purposes.
Interactions ● Conference: If more than one user attempts to enter an account code on a Conference Call, the first to enter a code will prevail. ● Repertory Dialing: An Account Code can be stored on a REP DIAL button. Press REP DIAL after ACCT ENTRY has been pressed.
ATTENDANT CALL EXTENDING Description Allows the attendant to put a call in a special hold condition, call another station, then connect the two calls together. The attendant can withdraw from the connection and separate the call from the console or remain connected to the other parties.
Considerations Attendant Call Extending allows the attendant to utilize the additional attendant related features such as Attendant Splitting One-Way (automatically places incoming canon hold), Release, Cancel, Return-On-Don’t-Answer, Return-On-Busy, Forced Release (SLAC), Join (SLAC), and Source/Destination (SLAC).
ATTENDANT CAMP-ON Description Allows the attendant to extend a trunk call to a busy voice terminal and leave it waiting or “camped on” there. After hearing busy tone, the attendant presses RELEASE to camp-on this call at the busy terminal.
Administration Requirements System: ● Number of seconds before a camped-on call returns to the Attendant Console (1-120 seconds) or No Attendant Camp-On allowed (0) - Default = 30 seconds.
ATTENDANT CANCEL Description Allows the attendant to terminate an attempt to extend any incoming call if the called station does not answer, or if the station answers but declines to accept the call. Before pressing RELEASE, the attendant presses CANCEL and is automatically reconnected to the calling party.
ATTENDANT CONSOLE, DIRECT TRUNK Description In System 25, the Attendant Console is used to answer incoming trunk calls that are not directed to specific user stations, to answer calls from inside users, to extend calls to inside stations and outside numbers, and to assist system users in placing outgoing calls and setting up conferences.
● Return-On-Don’t-Answer [RTN-DA]: Extended calls not answered are returned to the console on this button if not answered within a specified interval. ● Attendant Message Waiting [ATT MSG]: Used by the attendant to remotely control Message LEDs on voice terminals.
terminations on the rightmost two columns of buttons of the inactive console. Ringers disabled on an inactive console will be enabled on the active console for those trunks with dual appearances (appearances on both consoles).
— Release ● Trunk terminations–The following is required for each trunk terminated on the console (administered as Personal Line appearances; DID trunks cannot b e terminated on a DTAC): Trunk Number — Make this the Principal Station (owner) of the trunk (Yes, No) — Enable Ring (Yes, No).
ATTENDANT CONSOLE, SWITCHED LOOP (V2) Description In System 25, the Attendant Console is used to answer incoming trunk calls that are specified to ring at an attendant position, to answer calls from inside users, to extend calls to inside stations and outside numbers, to assist system users in placing outgoing calls, and to set up conferences.
In addition to the LOOP buttons and standard multiline terminal buttons (HOLD , TRANSFER, etc.), the console is equipped with the following feature buttons that provide unique ● ● ● ● ● ● ● ● ● ● ● ● ● ● attendant functions.
● Manual Signaling ● Transfer to Data ● Account Code Entry ● Auto Intercom ● Auto Answe r ● Direct Facility Access ● Direct Station Selection (DSS) ● Flex DSS ● Repertory Dialing. The last two features can be programmed with dialable numbers by the attendant.
Switched Loop Operation All calls that are intended for an attendant position are first routed by the system to a common queue where they wait to be sent to a console.
An incoming call from the queue to a console appears on one of the five LOOP buttons; the attendant is alerted to the call by audible ringing, a steadily lighted red lamp, and a flashing green lamp. While the call is ringing and while the attendant is handling the call, the system will direct no more calls to the console.
from the common queue while the console is unavailable. If this is not done, the button should be reassigned to another of the permissible features. In a two-console configuration, an attendant in Position Busy mode will be covered by the other attendant.
Call Originations Placing a new call from an active console causes interactions with the currently active call. At a console that has the default Automatic Release feature, the active call is dropped when the attendant presses anew LOOP button. The new loop becomes the active one; dial tone is provided, and the attendant can dial a number.
● Assign call type priorities and attendant specification. ● Assign call types and attendant specification for Message Center-Like operation in a two-console configuration. ● Assign Position Busy “backup’’ station, inapplicable. Hardware Requirements Each console requires a port on a ZTN79 ATL Station circuit pack.
ATTENDANT DIRECT EXTENSION SELECTION Description Permits the attendant to extend calls to stations by pressing one or two buttons instead of pressing START and dialing the PDC or DDC. Each attendant console in a system can have an associated Direct Extension Selector Console.
90 80 70 ❑ 60 50 40 30 ❑ 20 ❑ 10 00 ❑ ❑ ❑ ❑ 91 81 71 61 51 ❑ 41 31 ❑ 21 11 01 ❑ ❑ ❑ ❑ ❑ ❑ 92 82 ❑ 72 62 52 ❑ 42 32 22 12 02 ❑ ❑ ❑ 93 83 73 63 ❑ 53 ❑ 43 33 .
The rightmost button on the bottom of the console is a Test button. When it is pressed, all DXS LEDs will light sequentially; a second press allows individual LEDs to be tested and a third press ends the test. Considerations When there are two Attendant Selector Consoles in the system the Group Select button assignments are identical.
Administration Requirements Special Feature Ports: ● Requires a port assignment on a ZTN79 ATL Station Circuit Pack (CP) for each Selector Console. ● Assign Group Select button hundreds groups.
ATTENDANT DISPLAY (V2; SLAC Only) Description Provides displays of call-related information on a 16-character screen at the top of the Switched Loop Attendant Console (SLAC).
p for Call Park o for not logged-in FPDC. ● Number of calls waiting in the common queue (l-9 or ! for 10 or more) ● Trunk identification for incoming outside calls ● Conference information. Considerations The attendant display provides pertinent information about the currently active call.
Returning parked call: I }801 Park 4 The call parked on extension 801 at the Selector Console is returning to the attendant. Call from console to system user: 1728 Burns, R ! The extension number and name of the called party are presented. The ! symbol indicates that 10 or more calls are waiting in the queue.
The call from Carter has been split while the call is extended. After the attendant dials the desired PDC, screen 1 displays called party identification, and screen 2 remains unchanged: &1397 Phelps, T 7 2344 Carter, M & If the attendant now presses RELEASE, both screens go blank.
Pressing any button other than thos e listed above causes a message such as “NO INFORMATION” to be displayed. Timer Functions The LOCAL button allows the attendant to have access to the Timer controls on the left side of the display module. In the local mode, the screen can provide clock, calendar, timer, and alarm functions.
ATTENDANT FORCED RELEASE (V2; SLAC Only) Description Drops all active parties from a call in which the attendant and one or more other parties are connected together. The attendant uses the feature by pressing the FORCED RELEASE button while connected to other callers in a conference-type call.
ATTENDANT JOIN (V2; SLAC Only) Description Allows the attendant, while extending an incoming call, to connect together the calling party, the called party, and the console in a 3-way call. All parties can talk to each other. The attendant activates the feature by pressing the JOIN button while still connected to one of the other parties.
ATTENDANT MESSAGE WAITING Description Allows the attendant to remotely control the status of Message LEDs on user stations. Considerations This feature allows the attendant to notify stations that a message is available for them.
ATTENDANT POSITION BUSY Description Allows an Attendant Console to be placed in an inactive mode. Systems with Direct Trunk Attendant Console(s) (DTAC) There must be two Attendant Consoles in the system before this feature can be activated. A Position Busy (POS BUSY) button can be assigned on each of the consoles.
A console in Position Busy mode can receive attendant PDC, DID, and DGC calls, and outgoing calls can still be placed. Local functions can be activated. Considerations Position Busy allows one of two attendant positions to be made inactive when not required.
. Personal Lines (Trunk Appearances) on DTACs : All calls to trunks having an appearance in either of the two leftmost button columns will ring normally at the inactive console. All calls to trunks having appearances in either of the two rightmost button columns will not ring.
ATTENDANT RELEASE Description Releases the attendant from an extended call. There are two forms of Attendant Release: Manual and Automatic. This feature applies to the Direct Trunk Attendant Console (DTAC) and the Switched Loop Attendant Console (SLAC).
Interactions ● Attendant Camp-On: External calls that are released when Busy Tone is heard will be camped on. Administration Requirements None. Hardware Requirements None.
ATTENDANT RETURN COVERAGE ON BUSY Description Allows a camped-on call at a busy station or DGC Group to be returned to the attendant for service after a specified time period.
. Send All Calls (DTAC only): If Send Al ring at the DTAC. Administration Requirements System: Calls is activated, returning calls will . Assign number of seconds before unanswered camped-on calls return to the Attendant Position (1-120 seconds, or O for No Camp-On) - Default = 30 seconds.
ATTENDANT RETURN COVERAGE ON DON’T ANSWER Description Allows unanswered calls extended by the attendant to be returned to the attendant for additional service.
call). ● Send All Calls (DTAC only): If Send All Calls is activated, returning calls will ring at the DTAC. Administration Requirements System: ● Assign number of rings before call return to the Attendant Position (1-31) - Default = 5 Rings.
ATTENDANT SOURCE AND DESTINATION (V2; SLAC Only) Description Allows the attendant, while extending a call, to switch back and forth between the calling party (the source) and the called party (the destination) before connecting them together.
ATTENDANT SPLITTING ONE-WAY AUTOMATIC Description Allows the attendant to converse privately with a called party while the calling party is split away on hold. When the attendant presses START (or a DXS button) to extend an incoming call to a called party, the calling party is automatically split away from the connection and placed on hold.
ATTENDANT SYSTEM ALARM INDICATION Description Provides an Alarm on the Attendant Console to alert the attendant to problems detected by the system software. The ALARM LED on the Attendant Console will flash whenever a detected fault persists longer than four minutes, or if more than five transient faults per hour are detected.
AUTOMATIC INTERCOM Description Allows a multiline voice terminal user (or attendant) to place and answer calls to and from another station by use of a dedicated button appearance. Automatic Intercom provides a private path between two designated multiline voice terminals.
● Call Pickup: When an Automatic Intercom call is picked up via Call Pickup, the AUTO ICOM status LED on the called voice terminal lights steadily. The called party can press AUTO ICOM to enter the call at any time. ● Direct Group Calling: Automatic Intercom calls cannot be directed to DGC groups.
AUTOMATIC ROUTE SELECTION (ARS) Description Provides for the routing of calls over the telecommunications network based on preferred routes (normally the least expensive route available at the time the call is placed.
— FNPA calls made to numbers specified in the FNPA Exception List. — All other FNPA calls. ARS Flow Chart Figure 2-8 provides a simplified ARS flow chart. Bracketed numbers (e.g., [401], [601]) provide a link between ARS administrable action numbers and the associated item on the flow chart.
V1 Systems Only: For calls outside the HNPA (FNPA calls), a check is made against a non-administrable Special Numbers List. The numbers in the list include all “800” and “900” numbers and Telex codes 510, 610, 710, and 810. If a match is found, the call is routed via the local CO facility.
STATION USER DIALS ARS ACCESS CODE [401] NUMBER DIALED ON EMERGENCY NUMBERS LIST (911, AND THREE CUSTOMER NO DEFINED 7-DIGIT NUMBERS NO [601-603] I VOICE TERMINALS “RESTRICT OUTWARD CALLS” = YES S.
FROM SHEET 1 NUMBER DIALED WITHIN HOME NPA? SYSTEM [30] YES NO AREA CODE ON YES NPA ROUTING TABLE [300 ] NUMBER DIALED ON HOME NPA EXCEPTION LISTS [500] V1 ONLY: NUMBER DIALED ON SPECIAL NUMBERS LIST .
The following tones are associated with ARS: ● Confirmation–Indicates that a queued call is being serviced (trunk available to route call ) ● Busy—Indicates that the called number is busy ● Reorder–Indicates that all trunks are busy, the ARS queue is full, or that ARS calling is denied.
● Direct Facility Access Button: Multiline voice terminal users who have pressed FACILITY to activate the busy-to-idle reminder must wait until all queued ARS users have been serviced. ● Virtual Facilities (V2 only): Virtual Facilities may be used in place of trunk groups in ARS routing patterns.
— Subpattern A Start and End Time (Hour: Minute) — Subpattern A and B–Route 1, 2, and 3 Facility Access Codes (1-9999) or, in V2, Virtual Facility Codes (#190-#199) Subpattern A and B—Route 1, 2, and 3 FRLs (0-3) — Subpattern A and B Overflows to CO facility (Yes, No) Subpattern A and B Overflow FRL (0-3).
ROUTING PATTERNS (1-8) [100] NO [ 200] ROUTING SUBPATTERNS (RSP) A AND B RSP A ROUTE 1 ROUTE 2 ROUTE 3 START/ STOP TIME [101], [102] POOLED FACILITY ACCESS CODE [110] POOLED FACILITY ACCESS CODE [120].
BUSY-TO-IDLE REMINDER Description Enables a multiline voice terminal user to be alerted by a single ring as soon as a busy internal station, DGC group, or facility (trunk group) becomes available.
CALL ACCOUNTABILITY Description Allows system users to charge outside calls made from other users’ stations to their own PDCs. To charge a call to his or her own PDC, the user dials ## followed by the PDC immediately upon receiving first dial tone to place a call.
CALL ACCOUNTING Call Accounting is the collecting, processing, and use of information about all trunk calls placed from and received by System 25. It is intended to help customers control telephone use and manage associated costs. Detailed call data is available at Interface Port 3 of the Digital Switch’s Call Processor Circuit Pack.
. Data Records: The system prints call records for incoming and outgoing (external) data calls. Calls are considered data calls if they involve a data extension. The following list describes the SMDR data collected for each call and the number of characters in each field.
number of voice terminals will reflect the total call duration. The maximum time that can be reported is 95 hours, 59 minutes, and 59 seconds. . Blank (Column 46) .
Interactions . Account Code Entry: Allows users to have an account code or project number associated with each call record. . Direct Group Calling (DGC): For an incoming call to a DGC group that is connected to an announcement and never answered, “O” will be reported in the “STN” field of the call record.
Description CAS Model 100: The CAS 100, when connected to a serial printer and the System 25 SMDR port, calculates the cost of calls made to outside numbers, stores the cost information, and generates chronological and summary reports. After each incoming or outgoing call is completed, a call record is printed on the Chronological Report.
The CAS performs three main functions; (l) call record processing, (2) report generation, and (3) CAS system management. In addition, a limited directory lookup and message center is provided.
The following table summarizes CAS station and account code capacities. AT&T CALL ACCOUNTING SYSTEMS CAS Model Stations Account Codes 200 100 5000 300 150 5000 500 500 5000 2000 2000 15000 Refer to the CAS documentation supplied with the software package for additional information.
C C C D C C C D D C C C C C C C C C D C C C C C DATE 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 10/08/85 10/.
ASCII CHARACTER POSITION (Column Number) 01 02 03-04 05 06-07 08 09-10 11 12-13 14 15-16 17 18-35 36 37 38-39 40 41-42 43 44-45 46 47-51 52 53-56 57-58 59-73 74 75-78 79 80 DESCRIPTION Call Type Space.
ASCII CHARACTER POSITION 00 01-03 04-07 08-12 13-16 17-23 24-29 30 31-36 37-38 39-41 42-48 49-51 52-54 55-57 58-62 63-69 70-76 77-79 80 81 DESCRIPTION (top of form) Space DAT E Space TIM E Space CALLE D Space NUMBE R Space DU R Space FA C Space STN Space ACCOUN T Space PD C (Carriage Return) (Line Feed) Figure 2-12.
SYSTEM 25 PART OF CABINET OCTOPUS CABLE — — — PART OF ZTN82 SIP SMDR OUTPUT — — — OR ZTN128 C2 Z21OA C1 . 355A/AF DEVICE/CALL CALL ADAPT . ACCOUNTING PROCESSOR — — — SYSTEM — — .
SYSTEM 25 PART OF CABINET OCTOPUS CABLE PART OF ZTN82 SIP OR ZTN128 C2 Z210A C1 355AF C3 Z3A4 C1 CALL PROCESSOR ADAPT. ADAPT. ADU SMDR OUTPUT C4 DEVICE Z3A1 C1 OR CALL OR Z3A4 W1 B1 ACCOUNTING ADU (NOTE) SYSTEM C7 2012D 248B TRANS.
SYSTEM 25 CABINET PART OF ZTN82 OR ZTN128 CALL PROCESSOR (PORT X) TN726 TDM DATA BUS LINE TN726 DATA LINE PART OF OCTOPUS CABLE —— — SIP C2 Z210A C1 355AF Z3A4 . ADAPT. ADAPT. ADU —— — PART OF SIP —— — C2 . C1 Z210A 400B2 ADAPT. ADAPT.
SYSTEM 25 PART OF CABINET OCTOPUS CABLE PART OF —— — ZTN82 SIP —— — OR ZTN128 C2 . > Z21OA CALL ADAPT. CO OR PRIVATE LINE CIRCUIT CONNECT VIA TAE PROCESSOR —— — C1 C3 —— — T.
SYSTEM 25 CABINET ZTN82 OR ZTN128 CALL PROCESSOR TN758 POOLED MODEM —— — TDM TN726 DATA LINE BUS 2012D 248B TN742 ANALOG LINE CO TRUNK FACILITY PART OF OCTOPUS CABLE PART OF —— — SIP C2 Z210A C1 Z3A4 355AF . ADAPT. ADAPT. ADU PART OF SIP —————— — —— — C2 Z210A 400B2 .
CALL COVERAGE—GROUP Description Allows calls to covered stations to be redirected to a group of covering stations. A total of 32 standard Call Coverage Groups may be assigned; for V2 systems, an additional 32 “DGC” call coverage groups maybe assigned.
Calls sent to coverage will continue to ring at single-line sender terminals but will cease ringing at multiline sender terminals. In the latter case, the calls will remain on the incoming call appearance button, and that button’s status LED continues to reflect the status of the call.
Interactions (Standard Group Coverage) ● Attendant Console, Direct Trunk: If the Direct Trunk attendant is a receiver for a Call Coverage Group and extends a call (using the Start button or Selector.
Interactions (DGC Group Coverage; V2 Only) ● ● ● ● ● ● ● ● ● ● Attendant Console, Switched Loop: If a SLAC is a member of a DGC-Call Coverage Receiver Group, any DGC—Group Coverage call sent to this attendant will enter the common queue and be treated as a coverage call, not as an Attendant— DGC call.
. Number of rings before call coverage ringing starts on no answer (0-31); Default = 2. The status LEDs on Group Coverage buttons at covering stations begin flashing immediately in all cases. Ringing, in addition to flashing, is always sent on external calls, though it may not be accepted at the covering stations.
CALL COVERAGE—INDIVIDUAL Description This feature is very similar to Call Coverage–Group. The primary difference is that this is a one-on-one type coverage. An Individual Cover (COVER IND) button can be assigned on multiline voice terminals to cover calls to a specific (single) voice terminal.
Interactions ● Attendant Console, Direct Trunk: When a coverage call rings at a busy Attendant Console, the attendant receives a single burst of ringing. If the call is still unanswered when the attendant hangs up, the Attendant Console will resume ringing.
CALL FOLLOWING (FORWARDING) Description Allows users who are away from their phone to receive calls at another phone. The feature is functionally equivalent to Call Forwarding. Users can log in their PDC at another voice terminal and receive their calls at that terminal.
Interactions ● Call Coverage: Calls to a logged-in FPDC receive the call coverage of that terminal. [Unanswered calls to a PDC at an away terminal return to the home terminal and receive the home terminal’s call coverage treatment; they do not receive the away terminal’s call coverage.
CALL PARK Description Allows a user to place a call on hold and then pick up the call from any voice terminal in the system. It is used in three typical applications: . Call Park: A user places a call on hold and then picks it up at another voice terminal .
A call parked with the Selector Console is retrieved by dialing *8 and the access code assigned to the dedicated Selector Console Call Park button. Each voice terminal user (except the attendant) can only park one call at a time and a maximum of 24 calls can be parked in the system at one time.
Administration Requirements Attendant Selector Console: ● Assign Call Park buttons. Hardware Requirements None 2-88.
CALL PICKUP Description Allows a user to answer a call ringing at another voice terminal. There are two forms of Call Pickup; (l) Directed and (2) Group.
● Personal Line: After a call is picked up from a Personal Line (PERS LINE) button, the called terminal can still enter the call. Administration Requirements Voice Terminal (Station Port): ● Assign Call Pickup Group Number (1-16, None) - Default = None.
CALL PROGRESS TONES Call Progress tones provide audible feedback on the status of calls during call set-up. ● Busy Tone: A slow pulsed tone indicating that all facilities for answering the call are in use.
CALLING RESTRICTIONS Description Designated voice and data terminals can be restricted from making certain types of calls. Available restrictions are: ● Outward Restriction ● Toll Restriction ● Facility Access Restriction ● ARS Restrictions. Note: Each of these restrictions is voice terminal oriented, not PDC oriented.
ARS Restriction: Special restrictions on each station may be imposed when the call is routed by the ARS feature. Facility Restriction Levels (FRLs) are used to restrict access to trunk groups. An FRL is a single digit (0, 1, 2, 3). A terminal assigned an FRL of 0 has the least privileges, a terminal assigned an FRI.
Automatic Route Selection: ● Route Facility Restriction Levels Trunk Port: ● Allow dial access to this trunk (Yes, No) - Default = Yes System (V2 only): ● Allow dial access to this virtual facil.
COMMAND MODE Allows data terminal users to originate data and voice calls and change (or view) their data port options. (Refer also to the general description of the system’s data features in “Data Services Overview”; users who are familiar with Command Mode options should read the “Expert Mode” subsection.
<Options>: If the Command Mode menu item <Options> is chosen, the terminal displays the data port’s administered options. System default values for each option are also shown. The display shown below is similar to what is actually presented on the screen.
TABLE 2-F. Partial List of Permissible Data Port (TN726) Options OPTION DEFINITION Speed (61-68)† Autobaud, Low *, 300, 1200, 2400, 4800, 9600, 19200 Parity (69) Odd, Even, 0, 1. The 0 and 1 choices are not shown on the user’s display. Enable Command Mode (70) Yes or No.
TABLE 2-G. Typical Option Profiles for Different Types of Data Port Endpoints Options Speed (highest) Parity Enable Command Mode Permit Mismatch Local Echo Answer Text Connected Indication Disconnect/.
COMMUNICATIONS ACCESS MANAGER (CAM) (V2) The CAM program facilitates communication between workstations on the AT&T STARLAN NETWORK (STARLAN NETWORK) and workstations on System 25. Detailed procedures for using CAM can be found in the CAM User Guide.
The STARLAN NETWORK communication driver (NAUCOM) is used before CAM is run on a STARLAN NETWORK workstation. The Extended Device driver (CAM232) is used when CAM is run on a PC connected to a System 25 DLC port. The default screen presented when the user accesses CAM is the phone directory screen.
CONFERENCE Description Allows up to five parties, including the conference originator, to participate in a conference call. Any voice terminal user, including operators at Direct Trunk Attendant Consoles and Switched Loop Attendant Consoles (V2), can set up conferences.
● Call Park: Call park may be used to place a conference on hold. Parked conference calls do not return to the parking station (they remain parked). If a 5-person conference is parked, the conferee who parked the conference will be dropped when someone picks up the parked conference.
CONFERENCE DROP Description Allows a voice terminal user, except for the attendant at a Switched Loop Attendant Console (SLAC, V2 only), to selectively drop a previously added party from a conference call. At a SLAC, the attendant can drop conferees only before they have been added to conference.
Interactions None Administration Requirements None Hardware Requirements None 2-104.
DATA CALL SETUP Allows a user to originate data calls from a data terminal. System 25 provides three methods of data calling: ● Dialing from a data terminal, which is described in the “Data Terminal Dialing” feature description.
DATA SERVICES OVERVIEW System 25’s data features provide switched data transmission at up to 19,200 bps (RS-232 interface ), and a 212A modern compatible conversion resource capable of handling data at 300 and 1200 bps. The system provides switched connections between data endpoints.
and AB (Signal Ground) to function, while others require more RS-232 control signals to operate. An ADU (Figure 2-19) can send Data Terminal Ready (DTR) from the data terminal to the Data Line circuit and the Data Line circuit can send a control signal to the data terminal.
Data Terminal Dialing mode, or to enter the Setup mode on calls originating from a voice terminal or on auto-answered calls. In the case of most personal computers, a communications program must be executed in order for it to communicate with its own RS-232 port or built-in modem.
Data Endpoint States The data endpoint may take on three states: (l) off-line, (.2) on-line (on-hook), and (3) on-line (off-hook). Off-line is when a data terminal is out of service (turned off, disconnected, etc,). The on-line (on-hook) state occurs when the terminal is turned on, is available to answer a call, but is not on a data call.
Setup mode is entered. f. Data Call Setup Mode Data Call Setup Mode is a transitional state entered after Transfer To Data, Data Terminal Dialing, or during auto-answer; it exists during the handshake between data ports. If the endpoints are compatible and handshaking is successful, a data connection is established.
● Flashing–Data endpoint is being alerted of an incoming call ● On Steady–Data endpoint is either in the on-line (off-hook) state or is reserved for another user and busy.
DATA TERMINAL DIALING Description When the user makes a data call from a data terminal, voice terminal dialing and call progress tones are replaced by keyboard dialing and call progress messages. The message “DIAL:” prompts the user to enter the called number from the keyboard, and “RINGING” or “DIALING .
End-to-End Signaling: Data connections to off-premises destinations require that a conversion resource (pooled modem) be inserted into the connection. Occasionally it is necessary to send additional tones to the remote endpoint after the connection is established to signal the remote equipment.
TABLE 2-H. Call Progress Messages for Data Terminal Dialing Displayed Message Application Meaning DIAL: Placing a call Equivalent to dial tone. Enter any required facility number followed by the dialed number and a RETURN. RINGING Placing a call Equivalent to Ringback Tone.
Considerations Data Terminal Dialing allows users to place data calls from their terminals using the Data Terminal Dialing feature and allows users to review the options administered for their data ports.
DIAL PLAN The dialing plan for System 25 is based on the concept that, whenever possible, calls should be placed to individuals rather than to voice terminals. To implement this concept, individuals are assigned Personal Dial Codes (PDCs) and are allowed to log in those PDCs at other voice terminals.
● #5–Insert dialed digits here (in Virtual Facility numbers; (V2 only) ● #–End of dialing The maximum number of dial codes available for a System 25 is 600. In R1Vl, each assigned code is allocated as a ten number block. In R1V2, each assigned code is stored individually in memory.
DICTATION SYSTEM ACCESS Description Permits access to, and control of customer-owned dictation equipment by voice terminal users. Dictation systems may be connected either via single-line voice terminal ports (the preferred method) or via auxiliary trunk ports (if the dictation equipment requires a separate contact closure for proper operation).
SYSTEM 25 —— — CABINET PART OF OCTOPUS PART OF CABLE SIP TN742 —— — C2 W1 C5 DICTATION OR SI P l B1 ADAPT . EQUIPMENT ZTN78 —— — (NOTE) LEGEND : TN742 - ANALOG LINE CP ZTN78 - TIP RI.
DIGITAL TAPE UNIT (DTU) The Digital Tape Unit (Figure 2-21 ) is a RS-232 device used to record administration translations. The DTU does not encode the translations data as it records, nor does it require decoding circuitry when playing back (restoring) recorded data.
SYSTEM 25 PART OF CABINET OCTOPUS CABLE PART OF —— — ZTN82 SIP —— — OR ZTN128 C2 Z210A C1 ● 355A/AF CALL ADAPT. PROCESSOR —— — —— — LEGEND: C1 - MODULAR CORD (D8W-87) - PEC 2.
DIRECT GROUP CALLING (DGC) Description Al l O w S incoming calls to be directed to a specific group of terminals. Up to 32 DGC groups, each including up to 10 members, may be set up. A terminal can be in only one DGC group. Incoming calls on any trunk can be directed to a DGC group.
Considerations DGC groups are particularly useful when the answering group receives a high volume of calls. Call completion time is minimized and attendant assistance is not required. Any number of outside trunks may be administered to feed into a DGC group.
● Transfer: For V2 systems only: internal stations can transfer outside (trunk) calls to a busy DGC group. The transferred call will be treated as any other trunk call to a busy DGC group.
DIRECT GROUP CALLING DELAY ANNOUNCEMENT Description Provides a recorded announcement to an outside (trunk) caller who has been placed in queue for a DGC Group. When all members in the group are busy (off-hook), the call will be queued for DGC service and the calling party will receive ringback tone.
SYSTEM 25 CABINET PART OF OCTOPUS PART OF CABLE SIP TN742 —— — C2 SIP W1 C5 DELAY OR ● ADAPT . B1 ANNOUNCEMENT ZTN78 —— — EQUIPMENT —— — LEGEND: TN742 - ANALOG LINE CP ZTN78 - TIP .
Description Allows incoming calls to reach specific individuals or facilities in the system without attendant assistance. System 25 customers reserve blocks of DID numbers from the CO.
sender will flash and will then go dark when the call is answered. However, if the call is placed directly to the attendant position or is forwarded to the position and thereby arrives on a System Access button or a Loop button (e.
Hardware Requirements: Each DID trunk requires a port on a TN753 DID Trunks CP. 2-129.
DIRECT STATION SELECTION (DSS) Description Allows one-button access to another voice terminal, a paging zone, or a DGC Group. This feature requires a button assignment on a multiline voice terminal.
● Line Selection (Prime Line Preference): When Prime Line Preference is assigned to a DSS button, the button must be pressed to invoke the busy-to-idle reminder, even though its red I-Use LED is lighted. ● Personal Dial Code (PDC): An attempt to program a FPDC on a FLEX DSS button (rather than a PDC) results in Reorder Tone.
DISTINCTIVE RINGING Description Allows users to distinguish between different types of incoming calls. Users can receive the following types of ringing: ● A repeated two-burst tone indicates an outside call or a call extended by the attendant. The two-burst tone pattern is: 0.
END-TO-END SIGNALING Description Allows multiline voice terminals to send touch-tone (DTMF) signals over the DDD network and allows single-line and multiline users to send touch-tones over dial pulse trunks. The 7300H series voice terminals do not generate touch-tones when a dial pad button is pressed.
EXCLUSION Description Allows multiline voice terminal users to keep other users with appearances of the same Personal Line from listening in on their calls. Exclusion allows users to exclude the attendant and other stations from an existing or held outside call, or to drop other System 25 users from a call.
EXPERT MODE (V2) Description Expert Mode is an enhancement to the Command Mode feature that provides an alternative method of performing the full range of Command Mode functions. By eliminating the display of menus and allowing multiple commands to be entered on a single line, Expert Mode lends itself to computer-driven instructions.
If the user enters “D” and then a RETURN, the system will prompt for the data endpoint number as follows: Command: D DIAL: The user must then enter the digits required to complete the call.
Command: PE Change Parity to Even Command: MY Change Mismatch to Yes If the user enters an invalid Option or setting, the system responds with INVALI D OPTION and the entry is ignored. Once all changes have been entered, the user enters XE to enable the options.
EXTENDED STATIONS Description Allows single-line voice terminals to be located at distances greater than 2000 feet from the system cabinets. Extended stations have the same feature capabilities other voice terminals. These stations count as an outside party on conference calls.
EXTERNAL ALERTS Description Provides standard station ringing at a location away from the called station. This feature can be used to activate an external alerting device such as a bell. External Alerts supports the Trunk-Answer-from-Any-Station (TAAS) form of Night Service.
Order the Supplemental Alert Adapter (PEC 2301-SAA) for controlling a remote alerting device. A Supplemental Alert Adapter is installed in the line between the port CP and the user’s MERLIN terminal. The line requires a ZTN79 ATL Line CP. Figure 2-25 contains connection details.
SYSTEM 25 PART OF CABINET OCTOPUS CABLE PART OF —— — SIP ZTN79 —— — C2 SIP W1 C1 ATL ● ADAPT . B1 LINE CP —— — TERMINAL T1 —— — LEGEND : A1 - SUPPLEMENTAL ALERT ADAPTER (2301.
HANDS-FREE ANSWER ON INTERCOM (HFAI) Description Allows the following voice terminals to provide hands-free answer service on eligible incoming calls; each terminal must have Automatic Answer (AUTO ANS) assigned to a flexible button. ● BIS (7305H03B and 7305H04C) and HFAI (7309H01A); these sets provide full service without requiring adjuncts.
— During the call, the called party can press the HFAI/Mic or MICROPHONE button to mute the microphone temporarily and prevent the caller from hearing. Pressing the button again turns the microphone on again. — The HFAI/BIS user may pres s the SPEAKER (HFAI set) or th e SPEAKERPHONE (BIS set) button to end the call.
Interactions ● Attendant (V1 Only): The attendant may pass calls to HFAI sets using the Transfer feature and button rather than extending these calls using the START button or the Selector Console.
HEADSET ADAPTER ADJUNCT Description The headset adapter adjunct provides an interface for connecting a headset to an associated voice terminal. A headset plugged into the adapter is activated by switches on the adapter. The terminal operator has the choice of using either the handset or the headset for handling calls.
● Figure 2-28 -Typical Headset Adapter Connections for 34-Button Deluxe, BIS, or BIS with Display Voice Terminals ● Figure 2-29 -Typical Headset Adapter Connections for 12-Button MET Sets MET Head.
SYSTEM 25 CABINET ZTN79 HYBRID LINE CP PART OF OCTOPUS CABLE —— — PART OF SIP C2 SIP W1 C1 VOICE ● ADAPT B1 TERMINAL T1 , —— — C8 —— — —— — 502A HEADSET ADAPTER - PEC 3164-HF.
SYSTEM 25 CABINET PART OF ZTN79 HYBRID OCTOPUS CABLE —— — PART OF SIP LINE CP C2 SIP W1 B1 C1 VOICE ● ADAPT TERMINAL T1 —— — I —— — —— — C7 PWR SUPPLY P1 C8 502A HEADSET ADAP.
SYSTEM 25 CABINET TN735 MET LINE CP PART OF OCTOPUS CABLE PART OF SIP —— — —— — ● ● —— — C2 SIP W1 400B2 C1 MET SET B1 ADAPT ADAPT T1 C7 —— — LEGEND: —— — 248B ——.
HOLD Description Allows users to temporarily disconnect from one call and either place or answer another call. A single-line voice terminal user can place only one call on hold and must remain off-hook to retain the held call. A multiline voice terminal user can place as many calls on hold as it has lines and can hang up without losing held calls.
INTERCEPT TREATMENT WITH REORDER TONES Description Reorder tone (fast busy) is provided when an unassigned or toll-restricted number is dialed, a dialing error occurs, or an attempt to park a call fails.
INTERDIGIT TIMEOUTS Description Allows an originating register to be made available for others if dialing is not completed within a set time period. Interdigit timeouts is 24 seconds until the first five digits have been dialed, 10 seconds until the next five digits have been dialed, and five seconds thereafter.
LAST NUMBER DIALED (V2) Description Automatically saves the last number dialed from a multiline voice terminal and allows the user to place the call again without redialing the number. The feature is administered to a button on the terminal. Both inside and outside calls can be made in this way.
● Call Accountability: When a station user dials ##PDC to provide accountability for a call and then dials the desired digits, the ##PDC is not saved by the Last Number Dialed feature. ● Conference: When a station user adds a party to a conference, the number dialed is saved as the Last Number Dialed.
LINE SELECTION Description Multiline voice terminals may have many line (facility) appearances. There are three methods by which a user may select a desired line: (1) Prime Line Preference, (2) Ringing Line Preference, and (3) Preelection.
Preselection: Allows multiline voice terminal users to override the above line preference features. Users may simply press a desired line access button before going off-hook.
LINE STATUS AND l-USE INDICATIONS Description Provides users with a visual indication of the status of feature buttons and lines appearing at a their multiline terminals. A green status LED and a red I-Use LED are provided for each programmable button on most multiline voice terminals.
Administration Requirements None Hardware Requirements None 2-158.
MANUAL SIGNALING Description Allows a user to signal another voice terminal. The user may do this at any time, whether on-hook or off-hook. Multiline voice terminal users can signal another predesignated multiline voice terminal by pressing an associated Manual Signaling (SIGNAL) button.
MESSAGE CENTER-LIKE OPERATION (V2; SLAC Only) Description A System 25 Switched Loop Attendant Console (SLAC) can be made to function like a message center through administration of call type translations. Certain specific types of calls in the common queue will then be directed only to a console administered as a message center.
operator for the entire system. A call extended by either Attendant to a station that does not answer or is busy returns to the Message Center. Two combined Attendant Position/Message Centers; the Attendants at each combined position also function as Message Center operators.
MESSAGING SERVICES Description Lights an LED to indicate that another station (or the attendant) has a message for the user. The Messaging Services provide light activation/deactivation only.
Station-To-Station Message Waiting: Multiline voice terminals can be assigned (paired) Message Waiting (MSG WAIT) buttons with associated status LEDs. When this indicator is lighted, the user calls the other user for messages. The MSG WAIT LED can be controlled by the two associated terminals only ; either user can toggle the state of both LEDs (e.
MODEM POOLING Description Allows switched data connections between digital data endpoints and analog data endpoints. (Refer also to the description of the system’s data features provided in the “Data Services Overview’’ subsection.
● On-Premises Data Calls: To establish a data connection between an on-premises analog data endpoint and an on-premises digital endpoint. ● Outgoing Trunk Calls: To establish a data connection between an off-premises analog endpoint (modem) and an on-premises digital endpoint.
Hardware Requirements One TN758 Pooled Modem CP provides two conversion resources. Two TN758s are allowed per system cabinet, for a total of 12 conversion resources in a 3-cabinet system.
MUSIC-ON-HOLD Description Provides rnusic or other audible indication to a held party on an outside line. On an outside call, if the user places the call on Hold, or after a call into a DGC group receives the delay announcement, music is provided to the calling party.
Hardware Requirements A music source is needed to support the Music-On-Hold feature. The interface is a port on a ZTN78 Tip Ring Line CP or TN742 Analog Line CP.
SYSTEM 25 CABINET PART OF OCTOPUS CABLE TN742 PART OF SIP OR C2 SIP W1 MOH ADAPT. UNIT ZTN78 W1 368 VOICE W1 C6 MUSI C COUPLER B1 SOURC E W1 2012D TRANSFORMER LEGEND : TN742 - ANALOG LINE CP ZTN78 - T.
NIGHT SERVICE Description Allows users to answer incoming calls on specified trunks when the attendant is not on duty. There are two types of Night Service (NS): ● Directed NS: Redirects incoming calls on specified trunks to designated voice terminals.
Trunk-Answer-from-Any-Station: Allows any user to answer NS calls. Incoming trunk calls activate an external alerting device such as a bell (“External Alerts” feature). A user can then dial the NS access code and answer the call. Night Service is activated under the following conditions: ● An attendant has pressed NIGHT on either console.
● Assign Night Service Access Code. Hardware Requirements TAAS NS requires an associated external alert (such as a bell). Each alert requires a port on a ZTN78 Tip Ring Line or a TN742 Analog Line CP. Refer to the “External Alerts” subsection for detailed information and a connection diagram.
NIGHT SERVICE DELAY ANNOUNCEMENTS Description Provides a recorded announcement for incoming trunk calls when the system has Directed Night Service (NS) activated and a call is not answered. Directed NS calls not answered within a specified number of rings (1-15) may be directed to a recorded announcement.
SYSTEM 25 CABINET PART OF OCTOPUS PART OF CABLE SIP TN742 —— — C2 SIP W1 C5 DELAY OR ● ADAPT. B1 ANNOUNCEMENT ZTN78 EQUIPMENT —— — —— — LEGEND : TN742 - ANALOG LINE CP ZTN78 - TIP .
OFF-PREMISES STATIONS (OPS) Description An OPS is a single-line voice terminal that is located in another building and connected to System 25 via arrangements with the local CO. The station has the same features as an on- premises single-line station except that it is counted as an outside party in a conference call.
OUT-OF-BUILDING STATIONS Description Single-line voice terminals and multiline 7300H series terminals may be directly connected to the system even though they are not located in the same building. For 7300H series terminals special In-Range Out of Building (IROB) units are used to protect the switch and its users from lightning, power crosses, etc.
PAGING SYSTEM ACCESS Description Provides users with dial access or feature button access to paging equipment. As many as three paging zones can be provided, each with its own access code. (A zone is the location of paging loudspeakers, for example, conference rooms, warehouses, or storerooms.
Interactions ● Direct Inward Dialing: A DID call may access a paging code. This allows the user to dial in and utilize the Paging System Access feature.
SYSTEM 25 CABINET I PART OF TAE 700A NETWORK INTERFACE BLOCK (110- OR 66-TYPE CONNECTING BLOCK) W1 B ZTN76 W1 † PAGING OR C5 B1 ZTN77 SYSTEM LEGEND : ZTN7 6 - CO GROUND START TRUNK CP ZTN7 7 - CO LO.
SYSTEM 25 CABINET 25 PAIR DE CABLE PART OF 66-BLOCK A ❘❘❘❘ ❘ ❘❘❘❘ ❘ W1 278A W1 PAGING OR TN763 C5 ADAPTER B1 DICTATION SYSTEM LEGEND : -V GRO D-181321 ZENER KIT C6 48V DC P1 GRD -48V DC * Figure 2-34.
PERSONAL DIAL CODE (PDC) Description Each station is assigned a PDC. The user may log in the PDC at any other voice terminal, and calls to the PDC will follow the user. A PDC can be assigned to a convenience voice terminal (i.e., not associated with a particular user) and to data terminals with modems.
A call unanswered at the away terminal will be directed back to the home terminal unless one of the following busy conditions exists at the home terminal: (1) it is a multiline terminal with both Syst.
Interactions ● Call Coverage: Calls to a logged-in FPDC receive the call coverage of that terminal. lJnanswered calls to a PDC at an away terminal return to the home terminal and receive the home terminal’s call coverage treatment; they do not receive the away terminal’s call coverage.
PERSONAL LINES Description Provides a dedicated outside line for multiline voice terminal users. Unlike pooled facilities, which can be accessed via dial codes, Personal Lines can be accessed only via a dedicated feature button, and provide both incoming and outgoing service.
● Line Selection (Prime Line Preference): Prime Line Preference may b e assigned to a Personal Line. ● Pooled Facility: A Personal Line may also be a member of a pooled facility group.
POOLED FACILITY - DIAL ACCESS Description Allows both multiline and single-line voice terminal users to access a common pool of trunks by dialing a facility access code. Up to 16 facility access codes can be assigned (one per trunk group). The codes can be one to four digits in length.
POOLED FACILITY - DIRECT ACCESS Description Allows multiline voice terminal users to access a common pool of trunks via a Direct Facility Access (FACILITY) button. Upon pressing a FACILITY button and going off-hook, a multiline voice terminal user is connected to a common pool of outside trunks (i.
Administration Requirements Voice Terminal (Station Port): ● Assign Direct Facility Access (FACILITY) buttons. Trunks: ● Assign Facility Access Codes.
POWER FAILURE TRANSFER (PFT) Description Provides service to and from the CO for a limited number of prearranged single-line voic e terminals during a commercial power failure (or when voltage drops below 90 volts for longer than 250 milliseconds) and during other service interruptions.
trunks. If Ground Start trunks are used, a 55A1 Ground Start Button must be provided at each PFT set. Only FCC registered single-line voice terminals may be used for PFT stations. Rotary sets must be used for dial pulse PFT trunks; touch-tone sets must be used for touch-tone PFT trunks.
(TRUNK) AT&T 10B EMERGENCY TRANSFER UNIT SWITCH ADDITIONAL (CPU) ETU FOR PROPER OPERATION THIS UNIT MUST BE GROUNDED Figure 2-35. 10B Emergency Transfer Unit (ETU) 2-191.
SYSTEM 25 CABINET TRUNK 25-PAIR TAE CENTRAL ———————— — PORT OFFICE CALL -48V PROCESSOR TO ADDITIONAL ETUs ETU ETU TO SWITCH ETU TO (TRUNK) CO ❑ CPU ADDITIONAL ❑ ETU ETU TO SWITCH ETU TO 25-PAIR OCTOPUS STATION TAE CENTRAL OFFICE (LINE) 25-PAIR CABLE ———————— — PORT PART OF SIP 858A ADAPT.
700A NETWORK INTERFACE BLOCK DIGITAL SWITCH (66-, OR 11O-TYPE) CO TRUNK CP CO TRUNK CP CO NETWORK ACCESS CO TRUNKS RJ2x1 TRUNK CP CO TRUNK CP CO TRUNK CP CENTRAL OFFICE C 2 CO ANALOG STATION CP C1 PAR.
PROGRAM Description Enables system users to store numbers for access by feature buttons or code dialing. Multiline voice terminal users can program numbers on REP DIAL and FLEX DSS buttons. Both multiline and single-line terminal users can store Personal Speed Dialing numbers.
Special Characters (V2) The following special characters may be used in Repertory Dialing and Personal Speed Dialing numbers on R1V2 systems only: CHAR.
Programming Procedures Program mode may be entered either by dialing a code (#4) or by moving the Test/Program switch to P (on voice terminals so equipped). If the code is used to enter program mode, the terminal remains in program mode until the user goes on-hook or a timeout occurs.
Considerations The Progra m feature allows users to assign their own Personal Speed Dial/Flex DSS/Repertory Dial numbers. This is particularly useful where working arrangements or personnel responsibilities change. Interactions ● Users cannot place or answer calls while in the program mode.
RECALL Description Single-line voice terminal users can obtain System 25 Recall Dial Tone by pressing the RECALL button (not all single-line sets have a RECALL button). Pressing RECALL is equivalent to briefly pressing and releasing the switchhook (switchhook flash).
REMOTE ADMINISTRATION INTERFACE Description Provides dial-up access to the system’s administration port, either for a standard system administration terminal or for a PC running Advanced Administration software. Both read and write capability is provided with access to all system translation and fault tables.
REPERTORY DIALING Description Allows multiline voice terminal users to store a telephone number, account code, or feature access code in the system’s memory and associate that number with a REP DIAL button. Pressing REP DIAL is equivalent to dialing the stored number.
Administration Requirements Voice Terminal (Station Port): ● Assign Repertory Dial (REP DIAL) buttons. Hardware Requirements None 2-201.
SEND ALL CALLS (V1) Description Allows multiline voice terminal users whose calls are covered to temporarily direct some incoming calls to coverage and turn off their ringers to these calls. This feature is activated by pressing the SEND ALL CALLS button.
A covered station with Send All Calls activated will ring when called by its individual coverage station if there is only one coverage receiver for this station. ● Distinctive Ringing: Normal audible ringing is turned off for most incoming calls when Send All Calls is activated, unless single-ring reminder is administered.
SEND ALL CALLS (V2) Description Allows multiline voice terminal users to turn off their ringers and invoke a “do not disturb” condition toward incoming calls. In addition, users who have coverage will have those calls directed immediately to coverage, without the normal system ringing delay.
If a station is translated to not send ringing to coverage when calls to this station are unanswered, the Send All Calls feature overrides this instruction (ringing will b e sent). If a covering station activates Send All Calls, the station is removed from the coverage path completely.
SPEAKER Description Allows 7300 H-series voice terminal users to turn On a built-in speaker. The speaker allows on-hook dialing, group listening, and monitoring of call progress signals.
SPEAKERPHONE ADJUNCT Description The speakerphone adjunct permits users of voice terminals not equipped with built-in speakerphones to place and receive calls without lifting their handsets. The adjunct has an On/Off switch, a switch to temporarily mute the microphone, status lamps, and a volume control (for incoming voice only).
The S101A Speakerphone must be powered locally with a 2012D Transformer that plugs into a 115V ac receptacle. Adjunct power supplies are described in Section 4, “Hardware Description.” The S102A Speakerphone does not require supplemental power, except when used with a 34-Button Deluxe voice terminal.
SYSTEM 25 CABINET ZTN79 HYBRID LINE CP PART OF OCTOPUS CABLE —— — PART OF SIP C2 SIP W1 C1 VOICE ● ADAPT B1 TERMINAL T1 —— — —— — —— — LEGEND : B1 - TYPICAL-103A CONNECTING B.
SYSTEM 25 CABINET ZTN79 HYBRID LINE CP PART OF OCTOPUS CABLE PART OF SIP ——— — VOICE Z400F C2 C1 SIP TERMINAL ● ADAPT B1 ADAPT T1 ——— — C7 C8 ——— — PWR S102A ——— — SU.
SYSTEM 25 CABINET PART OF OCTOPUS CABLE —— — TN73 5 —— — PART OF SIP ● MET C2 ● SI P 400B2 W1 B1 C1 MET SET LINE CP ADAPT ADAPT T1 —— — C7 C8 —— — —— — 248 B —— .
SPEED DIALING Description There are two Dialing. System Speed types of Speed Dialing: (1) System Speed Dialing, and (2) Personal Speed Dialing: Allows the System Administrator to store up to 90 numbers (maximum of 28 characters in length) that are accessible by dialing 3-digit codes from any voice or data terminal.
were dialed directly. This includes analysis of the number for the various types of restriction. This feature can also be used when entering account codes. After pressing ACCT ENTRY or flashing the switchhook and dialing “*O”, the user can enter a System Speed Dialing code.
● Personal Lines: The Speed Dialing feature is not accessible from Personal Lines. ● Repertory Dialing: Storing a System Speed Dialing code (#100 -#189) on a REP DIAL button saves memory space, compared to storing the whole number again on the REP DIAL button.
STARLAN NETWORK ACCESS (V2) Description The AT&T STARLAN NETWORK (STARLAN NETWORK) Access feature provides connectivity between System 25 and a colocated STARLAN NETWORK. This connectivity is provided by a combination of hardware and software elements.
● Communications Access Manager (CAM) CAM is an MS-DOS applications program that provides an enhanced calling interface and terminal emulation for PCs connected to System 25 or a STARLAN NETWORK. This connection must be through a DLC or a STARLAN NETWORK that is, in turn, connected to System 25 by a STARLAN CP.
The STARLAN NETWORK View of System 25 From the STARLAN NETWORK, the STARLAN CP functions like a STARLAN NETWORK workstation equipped with a Network Access Unit (NAU). The NAU enables STARLAN NETWORK workstations and servers to access and exchange data over the network.
Calls from STARLAN NETWORK to System 25 A STARLAN NETWORK workstation accesses a host computer connected to System 25 (either a local host or a remote host that can be reached using the Modem Pooling feature).
PART OF SI P C2 I ZTN78 I I TN742 I W1 I I B1 I I A1 A2 ❘ ZTN84 ❘ 250 0 C5 SINGLE- SYSTEM 25 C2 LINE PHONE (LEG 1 ONLY ) NEU (STARLAN HUB) IN STARLAN WORKSTATION IN C1 NAU - NEU - ZTN84 - ZTN78 - .
PART OF SIP ZTN79 ❘ C2 W1 B1 A 1 A2 ZTN84 SYSTEM 25 ATL PHONE C1 C2 (LEG 1 ONLY) C4 T1 A3 IN NEU I N C1 NAU - NEU - ZTN79 - ZTN84 - A1 - A2 - A3 - B1 - C1 - C2 - C3 - C4 - T1 - W1 - NOTE 1: PC PHONE.
ATL Adapters The ATL adapter (KS23475) is a connection block that provides: 48V dc power from T1 (via modular cords C4 and Cl) to the ATL phone, data connections from the STARLAN workstation, and phone connections from the ATL phone (via modular cord Cl) over a shared common cable (C3) to System 25.
STATION HUNTING Description Provides linear, circular, or combinational hunting sequences for calls to busy single-line voice terminals and data terminals. Calls to a busy terminal may hunt to (only) one other terminal; however, up to five terminals may hunt to the same terminal.
Interactions ● Attendant Camp-On: When the attendant extends a call to a busy terminal in a hunt group, the call hunts for an idle terminal. If none is found, the call Camps-On to the called terminal. ● Call Coverage: Station Hunting initially overrides all call coverage options.
STATION-TO-STATION MESSAGE WAITING Description Allows a multiline voice terminal to turn On a Message Waiting LED located on another multiline voice terminal by assigning a MSG WAIT button on each terminal. Pressing MSG WAIT causes the LED on the signaling and signaled terminals to light.
SYSTEM ADMINISTRATION Description The software that controls System 25 operation consists of tables located in system memory. These tables contain data associated with: ● Trunk, Station, and Auxilia.
A significant advantage of the AAS package is that it can be used either at the same location or can be used remotely via a dial-up connection. Procedures for performing Centralized and Advanced Administration are provided in System 25 Adrninistration Manual and System 25 Advanced Administration Manual, respectively.
following characteristics: Display: The minimum display size is 16 lines by 80 columns. The port provides both carriage return and line feed characters to position the cursor at the start of the next line. Destructive scrolling is also expected (new lines added at the bottom of the screen and top- most lines disappear).
Figure 2-45. Model 703 System Administration Terminal 2-228.
SYSTEM 25 PART OF CABINET OCTOPUS CABLE —— — PART OF ZTN82 SIP —— — OR ZTN128 C2 Z210A C1 CALL ● ADAPT. 355A/AF PROCESSOR —— — SYSTEM ADMINISTRATION TERMINAL —— — LEGEND : C1.
SYSTEM 25 PART OF CABINET OCTOPUS CABLE ZTN82 —— — OR ZTN128 C2 ● CALL PROCESSOR —— — PART OF SIP Z210A C1 355AF C3 Z3A4 ADU C1 ADAPT. ADAPT.
SYSTEM 25 PART OF CABINET OCTOPUS PART OF CABLE ZTN82 SIP —— — OR ZTN128 C2 Z210A C1 C3 Z3A4 355AF CALL ● ADAPT. ADAPT. ADU PROCESSOR —— — (PORT X) PART OF SIP —————— — ❘ TN726 —— — ❘ C2 C1 TDM DATA Z210A 400B2 ● ❘ ❘ BUS LINE ADAPT.
SYSTEM 25 CABINET PART OF CO OR PRIVATE OCTOPUS LINE CIRCUIT CABLE PART OF CONNECT VIA TAE —— — SIP ZTN82 —— — OR ZTN128 Z210A – CALL l ADAPT.
SYSTEM 25 CABINET ——————— ZTN82 OR ZTN128 CALL PROCESSOR TN758 POOLED MODEM TDM TN726 BUS DATA LINE —— — ❘ ❘ C2 C1 Z210A 400B2 ● ❘ ADAPT. ADAPT. ❘ ❘ C7 —————— — 2012D 248B — TN742 ANALOG LINE CO TRUNK FACILITY PART OF OCTOPUS PART OF CABLE SIP —— — C2 Z210A C1 355AF C3 Z3A4 ● ADAPT.
SYSTEM MAINTENANCE Description The primary objective of System 25 maintenance is to detect, report, and clear troubles as quickly as possible and with minimum disruption to normal service. This goal is supported by periodic automatic diagnostic tests and fault detection hardware.
● Most Recent System Errors : The ten Most Recent System Errors are recorded by the system, regardless of their level of severity. These are stored in the Most Recent System Errors log. Error Logs The three error logs can redisplayed via the System Administration Terminal.
TANDEM TRUNKING (V2) Descriptio n Tandem trunking provides an enhanced networking capability for System 25. With this feature, tie trunks can be used to call through System 25 to reach another switching system (CO or PBX ). Calls may be completed over on-network or off-network facilities.
— If the requested trunk pool is dial accessible, an outgoing trunk is selected and the call proceeds normally. — If the requested trunk pool is not dial accessible, reorder tone is returned to the calling party.
TEST Descriptio n Provides users of the 7300H series voice terminals the ability to test their terminals. Placing the Test/Program (T/P) switch in the “T’’position causes all red and green LEDs to light alternately. The terminal also rings during the test.
THIRD-PARTY CALL SETUP (V2) Description The Third-Party Call Setup feature allows a data terminal (the third party) in Command Mode to set up a call between an on-premises voice or data terminal (the source) and another voice or data terminal (the destination; can be on- or off-premises).
Setting Up A Third-Party Call To set up a call from the third-party data terrninal, the user selects <Voice call> from the entry-level Command Mode menu (see Figure 2-51). The user then enters the characters as required to call the destination terminal.
Interaction s ● Call Coverage Third-Party Call Setup calls to the source terminal will not be directed to a coverage station. If the source terminal is not answered before coverage is invoked, the call is dropped and the NO ANSWER/DISCONNECTED messages are displayed at the third-party data terminal.
TIE TRUNKS Description Provides a private communications link between System 25 and another PBX. Incoming tie trunk calls may be directed to the attendant, to a voice terminal, or to a data endpoint. Service may be either automatic, immediate dial, delay dial, or wink start.
● Assign Night Service Delay Announcement (1, 2, or 0 for none) - Default = 0 ● Dial-Inward Capability (Tone or Pulse) - Default = Pulse. Hardware Requirements Requires port interfaces on a TN760B Tie Trunk CP.
TOUCH-TONE AND DIAL PULSE SERVICES Descriptio n All single-line voice terminals and MET sets are equipped with touch-tone dial pads that generate Dual Tone Multifrequency (DTMF) signals when a dial button is pressed.
Description Allows a user to transfer any call to another voice terminal. A user can transfer calls either with or without announcement. A multiline terminal user presses TRANSFER; the party is automa.
calls over a transferred trunk. ● Hold: An outside call placed on hold during call transfer receives music-on-hold, if available. A user attempting to return to a held internal call that has been abandoned will hear nothing.
TRANSFER TO DATA Descriptio n Allows multiline voice terminal users to originate or answer a call from their voice terminals and then establish a data connection by transferring the call to a data terminal. This feature was formerly called One-Button Transfer to Data (V1).
Preindication is canceled: ● If the user goes on-hook before transferring the call to data ● If the user preindicates on a second DATA button ● If, after dialing is complete, a second DATA button is pressed. Preindication is canceled for the first data terminal and the data call is transferred to the second data terminal.
TRUNK GROUPS Descriptio n Allows each trunk in the system to reassigned to one of up to 16 trunk groups. Trunks link two switching systems, such as System 25 and the local CO or System 25 and another PBX.
Trunk groups connecting with a local CO, WATS office, or FX office can be ground or loop start. DID trunk groups can be immediate or wink start. Tie trunks groups can be automatic, wink start, immediate start, or delay dial.
Administration Requirements Trunk Port: ● Assign Trunk Type And Number ● Assign Class Of Service Code [DID - (l-4); Other - (0-15)] ● Assign Facility Access Code - Default (See Note) ● Allow D.
TRUNK-TO-TRUNK TRANSFER Description Allows users to connect incoming trunk calls to other outside trunks and then hang up (under certain conditions). Incoming trunk calls may be transferred to another trunk, or conference with another trunk.
USER CHANGEABLE OPTIONS (V2) Description User Changeable Options allows a data terminal user who is in the Command Mode to view and change the settings of certain data port options. This feature is available to users of Data Line CP ports; users of STARLAN Interface CP ports cannot change their port options.
(ENTRY LEVEL) DIAL: DIAL: <eXit> <All> DISCONNECTED <Data call> <Voice call> <Options> <Hangup> <eXit> {Change options> <View options> (Options Displ.
Viewing Options When <View options> is selected, current and default values for the various data port options are displayed, as shown below: OPTIONS Speed (highest) Parit y Mismatch Local Echo Answer Text Connect Indicat.
Changing Data Port Speed The procedure for changing Speed settings is different from the procedure for changing the settings of other options. Within the Speed menu, the user may find that several values are marked with Xs.
● If the user selects <Enable options> , the system incorporates the changes requested and displays the message DISCONNECTED. If Autobaud is off, the user must now press BREAK to return to Command Mode. If Autobaud is on, the user must press BREAK and RETURN to return to Command Mode.
VIRTUAL FACILITIES (V2) Description A virtual facility (VF) is a call routing facility that is not defined by the physical facility (trunk) over which calls are routed, but is instead defined by a combination of access codes, authorization codes, and coded characters that allow special handling of the destination telephone numbers.
Whenever a VF is used to complete a call (either by dial access or through ARS), call processing treats the number as a physical facility for Station Message Detail Recording (SMDR) purposes. Thus, if VF code #190 is used to complete a call, the SMDR call record will show “#190” as the facility used.
The “#5” indicates that the destination number should be inserted here, rather than at the end of the VF translation. — The “#*” indicates that the system should transmit a “*” symbol as the first character of an identification code. — The “12345” represents the remaining characters in the identification code.
— Since “#5” was not embedded within this VFN, the destination telephone number (12125551643) will be transmitted after the WATS access code. VF codes may be included in numbers stored in REP DIAL buttons, System Speed Dialing codes, and Personal Speed Dialing codes if the VF code is used at the beginning of these numbers.
LIST OF FIGURES Figure 3-1. System 25 Digital Switch. . . . . . . . . . . . . . . . . 3-1 Figure 3-2. Call Processor (ZTN82 or ZTN128) Circuitry . . . . . . . . . . 3-3 Figure 3-3. Memory (ZTN81 or ZTN127) Circuitry . . . . . . . . . . . . 3-5 Figure 3-4.
LIST OF TABLES TABLE 3-A. TDM BUS Time Slots . 3-8 3-34 3-34 . . . ..... . . . . . . . . . . . . . . . . . . . . . . . . . . . TABLE 3-B. Signaling Type Summary .
SECTION 3—FUNCTIONAL DESCRIPTION This section describes how the digital switch and the software of System 25 provide control and switching. Digital Switch Figure 3-1 shows a sehematic diagram of the System 25 digital switch.
Common Control The Common Control circuitry consists of the Call Processor (ZTN82 in R1V1 or ZTN128 in R1V2) and Memory (ZTN81 in R1V1 or ZTN127 in R1V2) Circuit Packs and associated memory bus which is a 60-wire (including grounds), 39-bit (16-data, 23-address,), 6 MHz frontplane flat ribbon cable.
TO EMERGENCY EIA CHANNELS TRANSFER UNIT (RS-232C) (ETU) INTERRUPT CIRCUITRY / — — BUS ERROR MICROPROCESSOR CIRCUITRY — (68010) LED TDM BUS LEADS SERIAL SERIAL SERIAL SERIAL -48V DC CHANNEL CHA.
Network Controller: The network controller transmits control channel messages between the Call Processor and the port circuits over the TDM bus. The controller also monitors system clocks. The controller includes an 8-bit microprocessor that acts as a throttle passing messages between the Call Processor and the port board microprocessors.
Memory Circuit Pack (ZTN81 or ZTN127) The Memory Circuit Pack provides for the storage of software associated with system operation. This software includes call and administration processing, and other related programs. The circuit pack is powered from the backplane by +5 volts.
Switching Network System 25 uses distributed processing techniques to provide switched voice and data services. The switch operates at 64 Kbps. The switching network consists of the following: ● Time Division Multiplex (TDM) bus ● Port Circuits ● System Resource Circuits.
Two time slots are required for each 2-party conversation. Each party transmits (talks) on one time slot and receives (listens) on another. Only five parties are allowed in a conference. During a conference connection, each member of the conference transmits on an individual time slot while receiving on as many as four other time slots.
TABLE 3-A. TDM BUS Time Slots Time Slot No. 00 thru 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 thru 254 25 5 Function Control (5) -Tones- Dial Tone Busy Tone Re-order Tone Ringback Tone Data-N.
TDM BUS TERMINATOR CARD TDM BUS EXTENDER CABLE CABINET 3 ON/OFF SWITCH AC POWER # 6 AWG BUILDING GROUND WIRE CABINET 2 AC POWER #6 AWG GROUND WIRE CABINET 1 COUPLED BONDING CONDUCTOR (CBC) AC POWER TO SINGLE POINT GROUND Figure 3-5.
Port Circuits The following port circuit packs provide the link between trunks and external equipment and the TDM bus: ● Analog Line (TN742) ● ATL Line (ZTN79) ● Auxiliary Trunk (TN763) ● Data.
SINGLE-LINE VOICE TERMINALS (420, 500, 2500, 2514, 2554, 7101A) ——————— — RECORDED ANNOUNCEMENTS ——————— — DICTATION EQUIPMENT ——————— — EXTERNAL ALERTI.
SAT, DTU, SMDR, Z3A1 Z3A4 CAS (ON-PREMISES ADU ADU DIRECT CONNECTION) * * *REQUIRED FOR CONNECTIONS >50 FEET OR NOT SHARING SAME AC OUTLET —————————————— — SAT, SMD, C.
DATA TERMINAL RS-232C EQUIPMENT, HOST COMPUTER Z3A1/2/4 TN726 DATA LINE CP ADU SINGLE-LINE VOICE TERMINAL (2500-TYPE OR 7101A) DATA TERMINAL RS-232C EQUIPMENT, HOST COMPUTER Z3A5 TN726 DATA LINE CP AD.
Eight port circuits are provided on most port circuit packs. The Multibutton Electronic Telephone (MET) Line, Tie Trunk, and Auxiliary Trunk Circuit Packs each contain four port circuits. The port circuits provide an interface between terminals/trunks and the TDM bus.
The NPEs do switching network functions for the port circuits. Under control of the on- board microprocessor, an NPE can connect a port circuit to any one of the TDM bus time slots.
Ground Start Trunk (ZTN76) The Ground Start Trunk Circuit Pack interfaces eight central office trunks and the TDM bus. Figure 3-8 shows the following Ground Start Trunk unique circuitry: ● Ground detector circuit ● Port Input/Output (I/O) circuit ● Eight port circuits.
NPE O NPE 1 ● ❘ PORT T.3 ❘ ❘ ● ON-BOARD MICROPROCESSOR PORT 1/0 CIRCUIT ● ● PORT ● CIRCUIT ● 4 R.4 GROUND DETECTOR PORT CIRCUIT 0 CODEC HYBRID T.O R.O CIRCUIT 3 R.3 T.4 TO CENTRAL OFFICE ● ❘ ❘ ❘ T.7 PORT CIRCUIT 7 R.7 / Figure 3-8.
Loop Start Trunk (ZTN77) The Loop Start Trunk Circuit Pack interfaces eight central office loop start trunks and the TDM bus. Figure 3-9 shows the following Loop Start Trunk unique circuitry: ● Port Input/Output (I/O) circuit ● Eight port circuits.
NPE O ● NPE 1 ❘ ❘ ❘ ON-BOARD MICROPROCESSOR PORT CIRCUIT o CODEC HYBRID PORT I/O CIRCUIT T.O R.O T.3 PORT CIRCUIT 3 R.3 ● ● T.4 ● PORT ● CIRCUIT ● 4 R.
Tip Ring Line (ZTN78) The Tip Ring Line Circuit Pack interfaces eight analog tip and ring voice terminal lines (single-line voice terminals) and the TDM bus. Figure 3-10 shows the following Tip and Ring Line unique circuitry: ● Ringing application circuit ● Port Input/Output (I/O) circuit ● Eight port circuits.
Ringing Application Circuit: This circuit receives ringing voltage from the power supply. It monitors ringing voltage and current and generates signals to the on-boar d microprocessor indicating zero ringing voltage and current.
ATL Line (ZTN79) The ATL I,ine Circuit Pack interfaces eight hybrid voice terminal (7300H series) lines and the TDM bus. It terminates three pairs of wires from each terminal: analog voice pair, digital control pair, and power pair. Figure 3-11 shows the following ATL Line unique circuitry: ● Protocol handler ● Eight port circuit.
/ NPE 0 ❘ ❘ ❘ T.3 R.3 PORT TXT.3 CIRCUIT TXR .3 3 PXT .3 T.4 R.4 PORT TXT .4 CIRCUIT TXR.4 4 PXT.4 PXR.4 ❘ ❘ T.7 R.7 PORT TXT.7 CIRCUIT TXR .7 7 PXT.7 ● DATA TRANSCEIVER PROTOCOL HANDLER ● ELECTRONIC POWER FEED ON-BOARD MICROPROCESSOR ON-BOARD MICROPROCESSOR / PXR.
Data Line (TN726) The Data Line Circuit Pack interfaces eight Asynchronous Data Units (ADUs) data devices and the TDM bus. The ADUs are typically, in turn, connected to RS-232 type devices. Figure 3-12 shows the Data Line unique circuitry that includes: ● A bit clock ● Bus isolation ● Eight port circuit.
/ ● NPE 0 ● ● ● ON-BOARD MICROPROCESSOR ● ● / ● ● NPE 1 A PORT CIRCUIT 0 ASYNCHRONOUS PXT.O PROTOCOL DATA PXR.0 HANDLER UNIT TXT.0 (OATMEAL) (ADU) TXR.
MET Line (TN735) The MET Line Circuit Pack interfaces four Multibutton Electronic Telephone (MET) lines and the TDM bus. The MET Line unique circuitry consists of four port circuits as shown in Figure 3-13. Port Circuits: The four port circuits are identical.
● ● ON-BOARD MICRO- PROCESSOR NPE PORT CIRCUIT 0 ANALOG PORT DIGITAL PORT ELECTRONIC POWER FEED T.O R.O BT.O BR.O LT.O LR.O ❘ ● ❘ ❘ T.3 TO MET TERMINALS R.
Analog Line (TN742) The Analog Line Circuit Pack interfaces eight analog voice terminal lines and the TDM bus. Figure 3-14 shows the following Analog Line unique circuitry: ● Ringing application circuit ● Port Input/Output (I/O) circuit ● Eight port circuits.
Ringing Application Circuit: This circuit receives ringing voltage from the power supply. It monitors ringing voltage and current, generates signals to the on-board microprocessor indicating zero ringing voltage and current, and detects a terminal user lifting the receiver during ringing.
DID Trunk (TN753) The DID Trunk Circuit Pack interfaces eight central office trunks arranged for Direct Inwrd Dialing ((DID) and the TDM bus. Figure 3-15 shows the following DID Trunk unique circuitry: ● Port Input/output (1/0) circuit ● Eight port circuits.
NPE O NPE 1 ON-BOARD MICROPROCESSOR PORT CIRCUIT 0 TRUNK INTERFACE UNIT T.O CODEC HYBRID R.O ● ❘ ❘ ❘ PORT PORT T.3 CIRCUIT 3 R.3 I/O ● ● CIRCUIT ● ● ● PORT T.4 CIRCUIT 4 R.4 ● ● ❘ ❘ ❘ PORT T.7 CIRCUIT 7 R.7 TO CENTRAL OFFICE / Figure 3-15.
Tie Trunk (TN760B) The Tie Trunk Circuit Pack interfaces four 6-wire tie trunks and the TDM bus. Two tip and ring pairs form a 4-wire analog transmission line. An E and M pair are used for signaling. The T and R pair transmit analog signals from the circuit pack.
NPE ❘ ● ON-BOARD MICRO- PROCESSOR T.O PORT I/O CIRCUIT GROUND DETECTOR PORT CIRCUIT 0 R.O T1.0 R1.O E.O ● M.0 ❘ ❘ ❘ ● T.3 R.3 PORT T1.3 CIRCUIT R1.3 3 E.3 M.3 / Figure 3-16. Unique Tie Trunk (TN760B) Circuitry TO TIE TRUNKS UNPROT . 000 0 0 0 0 0 / PORT: 4 3 2 1 PROT .
TABLE 3-B. Signaling Type Summary SIGNALING TRANSMIT RECEIVE TYPE ON-HOOK OFF-HOOK ON-HOOK OFF-HOOK I Std. grd bat open/bat (*) grd I Compat. open/bat (*) grd grd open/bat (*) V open grd open grd * An open circuit is preferred over voltage. TABLE 3-C.
Auxiliary Trunk (TN763) The Auxiliary Trunk Circuit Pack interfaces four ports provided for client-provided equipment (CPE) and the TDM bus. It is connected to the CPE by up to three pairs of wires. The transmission pair (T and R) carry voice signals and touch-tone control signals.
NPE ● ON-BOARD MICROPROCESSOR PORT I/O CIRCUIT GROUND DETECTOR T.O R.O ● PORT S.0 CIRCUIT S1.0 0 SZ.0 SZ1.0 I I I I I TO AUXILIARY EQUIPMENT ● ❘ T.
STARLAN Interface (ZTN84) (V2) The STARLAN Interface (ZTN84) is a System 25 circuit pack (CP) designed to function as either a gateway or a bridge between the PBX and the AT&T STARLAN NETWORK.
System Resources The System Resource Circuit Packs (CP) are as follows: ● Service Circuit (ZTN85) ● Tone Detector (TN748) ● Pooled Modem (TN758). Service Circuit (ZTN85) The Service Circuit CP provides the clock signals of the system. It also generates and receives tones.
generator and time slot table circuits with the TDM bus. Tone Generator: The tone generator consists of a digital signal processor (DSP), a counter, and a dual-port tone RAM. The DSP operates at 10 MHz and produces .24 different tones. The dual-port tone RAM stores these tones in 24 different addresses.
TONE GENERATOR (DSP) TONE TIME TABLE SLOT (DPRAM) TABLE (DPRAM) TDM BUS BUS BUFFER ● LEADS ● SAKI ● CIRCUIT PACK ADDRESS LEADS ● ● LEDs NETWORK BUS RED YELLOW GREEN RAM ADDRESS & DATA BUS U-CONTROL ● NPE TONE OUTPUT DETECTORS REGISTERS ● SYSTEM CLOCK Figure 3-19.
Tone Detector (TN748) The Tone Detector Circuit Pack provides four touch-tone receivers and two general purpose tone receivers that detect appropriate system and network tones on the TDM bus.
/ ❘ ● ❘ PORT CIRCUIT ❘ ● NPE 1 ● 1 PORT ● CIRCUIT 7 ● PORT CIRCUIT 4 ● ● RAM ● PORT CIRCUIT / 5 ● ❘ ON-BOARD PORT ❘ SAKI ● MICRO- I/O ● PROCESSOR CIRCUIT ❘ ● PORT .
Pooled Modem (TN758) The Pooled Modem Circuit Pack supports 0-300 and 1200 bits per second (bps) data speeds and provides the following: ● Circuitry to provide a signal compatible with the modulatio.
Common Circuitry: The Pooled Modem common circuitry that includes all circuitry shown on Figure 3-21 except the Conversion Resource circuitry provides the same general function as the intelligent port common circuitry.
Software The System software consists of switched services, administrative, and maintenance software. This software runs on top of the real-time operating system software. Switched Services Software The switched services software provides voice and data call processing.
Traffic load, defined as the sum of static and dynamic loads, is a function of the number of features that are executed, the frequency with which they are executed, the system configuration, and the instantaneous (peak) call processing load. The configuration contribution to load is known as dynamic load.
Error Logger: Prioritizes and stores system errors. The errors are stored in three error records (located in System RAM), that are: ● Permanent System Alarms ● Transient System Errors ● Most Recent System Errors. The Error Logger lights the Alarm LED (located on the Attendant Console) when a serious error is detected.
` / FEATURE CODE MODULES MEMORY STATION CIRCUIT SMDR ADMINISTRATION CALL ● ● ● PACK (TASK) PROCESSING PROCESSING (TASK) (TASK) ▲ ▲ ▼ ▼ SYSTEM RAM ERROR CALL PROCESSOR LOGGER CIRCUIT PAC.
6. The Station Call Processing task retrieves its message and interprets it as a call origination. The task determines whether there is an idle call appearance button (System Access button) on the called voice terminal. If so, two available time slots are reserved for the connection.
LIST OF FIGURES Figure 4-1. System 25 Cabinets (J58901A)—Three Cabinet System . . . . . . 4-2 Figure 4-2. System Cabinet (J58901A)—Rear View . . . . . . . . . . . . 4-3 Figure 4-3. System Circuit Pack Configurations . . . . . . . . . . . . . 4-5 Figure 4-4.
Figure 4-29. Typical ADU Connections—Supporting Data Terminal And 7300H Series Multiline Voice Terminal . . . . . . . . . . . . . . . . . 4-60 Figure 4-30. Typical MADU Connections . . . . . . . . . . . . . . . . 4-61 Figure 4-31. Z3A1/2/4 ADU Local Power Connections .
SECTION 4—HARDWARE DESCRIPTION This Section provides descriptions of System 25 hardware components and their functions. The hardware is covered under the following major headings: ● System Cabinets: Includes Circuit Pack (CP) carriers and CPs. ● Terminal Equipment: Equipment that can be connected to voice or data station ports.
The front cover of the cabinet is secured by four screws. These screws must be loosened slightly before the cover can be removed. When removed, access is provided to the CPs, a replaceable air filter mounted just under the CP carrier frame, and two cooling fans.
Each cabinet has its own power supply mounted to the left of the CP carrier. The power supply is 3 inches wide and weighs about 9 pounds. Voltage and current supplied to the carrier are: +5 V dc at 35A, -5 V dc at 3A, -48 V dc at 3A, and 90 V ac at 0.
Cabinet 1 (Control and Port Circuits) Cabinet 1 (Figure 4-3) is always required. It provides mounting space for 12 CPs and can support a small telecommunications system (eg.
CIRCUIT PACK SLOTS 1 2 3 4 5 6 7 8 9 10 11 12 POWER PORT CIRCUITS SERVICE CIRCUIT CALL PROCESSOR (a) CABINET 1 - (MOUNTING FOR 3 CONTROL & 9 PORT CIRCUIT PACKS) CIRCUIT PACK SLOTS 1 2 3 4 5 6 7 8 9 10 11 12 POWER PORT CIRCUITS SUPPLY (b) CABINET 2 OR 3 - (MOUNTING FOR 12 PORT CIRCUIT PACKS) NOTES : 1.
TABLE 4-A. Total Port Circuit Packs Per System NUMBER PORT TOTAL PORT OF CABINET CIRCUIT CIRCUIT CABINETS NUMBER * PACKS PACKS † 1 Cabinet 1 9 9 2 Cabinet 1 9 21 Cabinet 2 12 3 Cabinet 1 9 33 Cabine.
Circuit Packs Required Circuit Packs: The following CPs are provided with all systems and must be mounted in Cabinet 1: ● ZTN82 (V1) or ZTN128 (V2) Call Processor The ZTN82 or ZTN128 (one per system.
● TN758 Pooled Modern Provides two integrated 212-modem compatible conversion resources for switched connections between analog endpoints (modems), or a digital endpoint and an analog endpoint. A maximum of two TN758s (4 conversion resources) is permitted in each cabinet.
Trunk Port Circuit Packs ● TN753 DID Trunks Provides eight ports for immediate-start or wink-start Direct trunks. ● TN760B Tie Trunks Inward Dialing (DID) Provides four ports for Type 1 E&M, Type 1 E&M Compatible, or Type 5 Simplex tie trunks.
Circuit Pack Features All system CPs have the following features: ● Solid-state circuitry mounted on 7.6 by 14.1-inch printed wiring board (TN-type) ● Color coded face plate labels identify the CP.
Table 4-B lists CPs that can be used with System 25. A description of each CP is provided in Section 3, Functional Description. TABLE 4-B. System Circuit Packs CIRCUIT NUMBER CIRCUIT PACK TITLE PAC K .
Terminal Equipment Terminal equipment is connected to System 25 station (voice or data) ports. It is made up of the following groups: ● Voice Terminals — Single-Line — Multiline (MERLIN sets and MET sets) ● Voice Terminal Adjuncts ● Attendant Consoles ● Asynchronous Data Units (for interface with data terminals).
TABLE 4-C. Summary of Voice Terminals TERMINAL CIRCUIT PACK TYPE * MODEL DESCRIPTION INTERFACE 420 Memory Set W/Built-In Speakerphone 500MM Rotary Desk Set ZTN78 Single-Line 500SM Rotary Set Compatibl.
Model 2500 Series Each of the following Model 2500 voice terminals come equipped with: ● Handset ● Touch-Tone Dial (Dual Tone Multifrequency - DTMF) ● Ringer Volume Control.
Model 7101A (MD) (PEC 3170-00M) The Model 7101A (Figure 4-5) is about 2-3/4 inches wide, 3-1/2 inches high, and 8-1/2 inches long. The set comes equipped with the following: ● ● ● ● ● Handse.
420 Speakerphone (V2) The 420 Speakerphone (Figure 4-6) is a single-line voice terminal that can be desk or wall mounted. This set comes equipped with the following: ● Handset ● Touch-Tone Dial ● Built-In Speakerphone ● Twelve Memory Buttons—Where emergency numbers and frequently called numbers can be stored for quick calling.
MEMORY BUTTONS REDIAL BUTTON PROGRAM BUTTON FLASH BUTTON HOLD BUTTON SPEAKERPHONE BUTTON AND LAMP MUTE BUTTON VOLUME SPEAKER RECEIVER CONTROL VOLUME VOLUME CONTROL CONTROL AND LAMP Figure 4-6.
TABLE 4-D. Model 2500 Series Voice Terminal Adjuncts Adjunct 2500DMGC 2500MMGB 2500SM 2514 BMW 2554BM 4A Speakerphone x 55A1 Ground x x x x x Start Key AT&T Answer-Record x x x x x 2500 or Code-A-.
Multiline Voice Terminals The system supports MET (10- and 12-button only) and MERLIN (7300H Series) multiline voice terminals. Multiline voice terminals have two LEDs located beside each assignable button (except for the 34-button basic set). The LEDs are referred toas I-Use (red) and Status (green) LEDs.
5-Button Voice Terminal (7302H01D) PEC 3160-111 The 5-Button Terminal (Figure 4-7) can be desk or wall mounted and is about 5-3/4 inches wide, 5-1/4 inches high, and 8-1/2 inches long.
I-USE/STATUS LEDs HANDSET SYSTEM ACCESS TEST/PROGRAM PROGRAMMABLE SWITCH FEATURE BUTTONS ❑ CONFERENCE ❑ SPEAKER/RING TRANSFER HOLD ❑ DROP ❑ VOLUME CONTROL SWTICH TOUCH DIAL PAD RECALL SPEAKER Figure 4-7.
10-Button Voice Terminal (7303H01D) PEC 3161-172 The 10-Button Terminal (Figure 4-8) can be desk or wall mounted and is about 7 inches wide, 5-1/4 inches high, and 8-1/2 inches long.
I-USE/STATUS LEDs SYSTEM ACCESS (2) PROGRAMMABLE FEATURE BUTTONS (3) TEST/PROGRAM SWITCH PROGRAMMABLE FEATURE HANDSET BUTTONS (5) ❑ CONFERENCE ❑ TRANSFER TOUCH DIAL PAD ❑ DROP ❑ HOLD SPEAKER/RING VOLUME CONTROL SWITCH SPEAKER RECALL MESSAGE Figure 4-8.
34-Button Voice Terminal (7305H01D) (MD) PEC 3162-412 The 34-Button Terminal (Figure 4-9) can be desk or wall mounted and is about 10-1/4 inches, 5-1/2 inches high, and 8-1/2 inches long. This set is available only on a reuse basis and is not orderable via the Delivery Operation Support System (DOSS) Configurator.
I-USE/STATUS LEDs SYSTEM ACCESS (2) HANDSET PROGRAMMABLE FEATURE BUTTONS (3) TEST/PROGRAM SWITCH TOUCH DIAL PAD SPEAKER/RING VOLUME CONTROL SWITCH MESSAGE SPEAKER ❑ CONFERENCE ❑ TRANSFER RECALL ❑ DROP ❑ HOLD PROGRAMMABLE FEATURE BUTTONS (29) Figure 4-9.
34-Button Deluxe Voice Terminal (7305H02D) PEC 3162-417 The 34-Button Deluxe terminal (Figure 4-10) is available for general use and as a Direct Trunk Attendant Console. The voice terminal is about 10-1/4 inches wide, 5-l/2 inches high, and 8-1/2 inches long.
default assignments. † On the primary Attendant Console, the first of the Direct Facility (Pooled) Access buttons defaults to loop-start trunks, the second to ground-start trunks, and the third to tie trunks. For any trunk type not assigned in the system, the associated button does not receive a default assignment.
Built-In Speakerphone (BIS) Voice Terminal (7305H03B) PEC 3162-BIS The BIS voice terminal (Figure 4-10) can be desk or wall mounted and is about 9-1/2 inches wide, 5-1/4 inches high, and 9-1/4 inches long.
HANDSET I-USE/STATUS LEDs SYSTEM ACCESS (2) PROGRAMMABLE FEATURE BUTTONS (3) TEST/PROGRAM SWITCH TOUCH DIAL PAD SPEAKER/RING VOLUME CONTROL SWITCH PROGRAMMABLE FEATURE BUTTONS (29) SPEAKERPHONE VOLUME CONTROL RECALL HFAI MESSAGE MICROPHONE SPEAKERPHONE CONFERENCE ❑ TRANSFER ❑ DROP ❑ HOLD ❑ Figure 4-11.
Built-In Speakerphone (BIS) Voice Terminal With Display (7305H04C) PEC 3162- DIS (V2 only) The BIS Voice Terminal with Display (Figure 4-12) is available for general use and as a Switched Looped Attendant Console (SLAC). In general use, it can be desk or wall mounted; as a console it is normally desk mounted.
For Use as a Switched Loop Attendant Console: — Five predefined as loop buttons — Twelve other predefined (Inspect, Attendant Message Waiting, Alarm, Local, Scroll, Forced Release, Start, Source, .
Hands-Free-Answer On Intercom (HFAI) Voice Terminal (7309H01B) PEC 3161-161 The HFAI voice terminal (Figure 4-13) can be desk or wall mounted and is about 6-1/4 inches wide, 5-1/4 inches high, and 9 inches long.
I-USE/STATUS LEDs HANDSET SYSTEM ACCESS (2) TEST/PROGRAM SWITCH PROGRAMMABLE FEATURE BUTTONS (3) TOUCH DIAL PAD PROGRAMMABLE FEATURE BUTTONS (5) SPEAKER/RING VOLUME CONTROL SWITCH CONFERENCE ❑ TRANSFER ❑ DROP ❑ HOLD ❑ MESSAGE ❑ HFAI MICROPHONE ❑ RECALL ❑ SPEAKER ❑ Figure 4-13.
Ten Button Multibutton Electronic Telephone (MET) (2991 C/D05) The Ten Button MET set (Figure 4-14) may be desk or wall mounted. This set is available only on a reuse basis and is not orderable via the Delivery Operation Support System (DOSS) Configurator.
TOUCH TONE DIAL PAD HANDSET RECALL INDICATOR BUTTON LAMPS SYSTEM ACCESS PROGRAMMABLE FEATURE BUTTONS MESSAGE WAITING DROP CONFERENCE TRANSFER HOLD Figure 4-14.
Ten Button MET With Built-In Speakerphone (2993C04) The 10-Button MET set with BIS (Figure 4-15) can be desk or wall mounted. This set is available only on a reuse basis and is not orderable via the Delivery Operation Support Systcrn (DOSS) Configurator.
TOUCH TONE DIAL PAD SYSTEM ACCESS PROGRAMMABLE FEATURE BUTTONS HANDSET ON/QUIET BUTTON ON LAMP SPEAKERPHONE OFF BUTTON VOLUME RECALL INDICATOR CONTROL BUTTON LAMPS / ❑ MESSAGE WAITING ❑ DROP ❑ CONFERENCE ❑ TRANSFER ❑ HOLD Figure 4-15.
Twelve Button MET Set (7203M) The 12-Button MET set (Figure 4-16) is a freestanding voice terminal. This set is available only on a reuse basis and is not orderable via the Delivery Operation Support System (DOSS) Configuator.
❑ HOLD I-USE/STATUS LEDS ❑ TRANSFER ❑ CONFERENCE ❑ DROP ❑ MESSAGE HANDSET TOUCH TONE DIAL PAD TONE RINGER VOLUME CONTROL DISCONNECT RECALL ❑ (PROGRAMMABLE) ❑ (PROGRAMMABLE) ❑ (PROGRAMMABLE) ❑ SYSTEM ACCESS ❑ SYSTEM ACCESS Figure 4-16.
Multiline Voice Terminal Connection Information Detailed connection information is provided in the following figures: ● Figure 4-24—On-Premises 7300H Series Multiline Voice Terminal Connections .
Voice Terminal Adjunct Connection Information Detailed adjunct connection information is provided in Section 2 with the detailed feature descriptions of the headset adapter and speakerphone adjuncts.
Asynchronous Data Units (AD US) Asynchronous Data Units, and Multiple Asynchronous Data Units (MADUs), provide an interface between ports on the TN726 Data Line CP and RS-232C Data Terminal Equipment (DTE) or Data Communications Equipment (DCE).
RS-232C CONNECTOR INTERFACE TELEPHONE JACK WALL JACK OPTIONAL ORIGINATE/DISCONNECT SWITCH Figure 4-17. Asynchronous Data Unit (ADU) ADU Connection Information Detailed connection information is provid.
TABLE 4-F. Asynchronous Data Units UNIT PEC FEATURE Z3A1 2169-001 3-foot plug-ended EIA connector and mod jack for single-line set. Z3A2 2169-002 EIA plug and mod jack for single-line set. Z3A4 2169-004 3-foot receptacle-ended EIA cord and mod jack for single-line set.
Peripheral Equipment Peripheral Equipment is equipment that connects to the Call Processor (ZTN82 or ZTN128) CP, including: ● ● ● System Administration Terminal (SAT); refer to “System Administration” in section 2. Digital Tape Unit (DTU); refer to “Digital Tape Unit” in Section 2.
AC Power Line Surge Suppressor The TII Model 428 Self-Restoring Powerline Surge Suppressor (PEC 8310-001, Comcode 402988950) protects against electrical surges, spikes, and transients that can cause damage to the System 25 power supply. A pilot light indicates that full protection is present.
trunk CPs (except Tie Trunk CPs) can be connected to a three-way splitter cable (OR6016) that concentrates the CP interfaces into one 25-pair cable. Up to two Tie Trunk CPs can be connected to a two-way splitter cable (OR6015) that concentrates the CP interfaces into one 25-pair cable.
Station Interconnect Panel (SIP) The Station Interconnect Panel (SIP) provides for the connection of the terminals (voice and data), peripheral equipment, and some auxiliary equipment of the system to station port CPs.
NOT E MODULAR JACK ROW NUMBE R 28 1/16” PURS E LOC K CLI P ADAPTER MOUNTING CLIP BUILDING WIRING RING COLUMN LETTER BOX NOTE 10” WIDE, 9 1/2” MOUNTING OCTOPUS CABLE CENTERS WHEN FLANGES DISTRIBUTION POST ARE OVERLAPPED Figure 4-19.
Figure 4-20 shows voice terminal connections to the system cabinets via the SIP. Typically, voice terminals are plugged into modular wall jacks that provide a cut-down block for building wiring. At the SIP, 858A Adapters provide a cut-down point for 4-pair wire runs.
Connectivity Figures Figures 4-21 through 4-31 provide connection information for various equipment. These figures have been included as an aid to understanding how equipment can be connected to System 25 and to indicate required connecting and supporting equipment.
SYSTEM 25 CABINET PART OF OCTOPUS PART OF CABLE SIP ZTN78 —— — SINGLE-LINE C2 SIP W1 C5 OR VOICE ● B1 TN742 ADAPT. TERMINAL —— — (NOTE) —— — —— — LEGEND: ZTN78 – TIP RING C.
SYSTEM 25 PART OF CABINET OCTOPUS CABLE EXPOSED CABLE —— — TN742 —— — ANALOG C2 SIP W1 D1 D1 ● ADAPT. LINE CP —— — —— — G G —— — SINGLE-LINE VOICE C5 TERMINAL B1 (NOTE).
PART OF TAE SYSTEM 25 PART OF 700A NETWORK CABINET OCTOPUS INTERFACE BLOCK CABLE (110- OR 66-TYPE) —— — PART OF NETWORK TN742 ANALOG LINE CP —— — SIP INTERFACE C2 SIP W1 A ● ADAPT.
SYSTEM 25 PART OF CABINET OCTOPUS CABLE —— — PART OF —— — SIP ZTN79 C2 ● SIP W1 B1 VOICE ATL ADAPT . TERMINAL LINE CP __ _ T1 —— — TYPICAL-103A CONNECTING BLOCK* MODULAR CORD (D8W-.
SYSTEM 25 CABINET ZTN79 ATL LINE CP PART OF EXPOSED CABLE OCTOPUS CABLE ——— — I ● PART OF SIP IROB IROB ——— — C2 SIP C1 PROTECTION PROTECTION ADAPT TII 341 TII 341 ——— — (NOT.
SYSTEM 25 CABINET PART OF OCTOPUS CABLE PART OF SIP TN735 —— — W1 400B2 MET C2 SIP ● C1/C9 MET ADAPT. B1 ADAPT SET LINE CP —— — —— — C7 —— — 248B ADAPT 2012D TRANS LEGEND : B.
SYSTEM 25 PART OF CABINET OCTOPUS CABLE PART OF —— — SIP ZTN79 —— — C2 451A Z400F C1 HYBRID ● SIP ADAPT. ADAPT. ADAPT. LINE CP —— — —— — C7 W1 MBPS P2 7300H SERIES C1 VOICE B.
SYSTEM 25 PART OF CABINET OCTOPUS CABLE PART OF SIP —— — ZTN78 C2 OR ● TN742 —— — ADAPT SIP M1 Z3A1 —— — B1 (WP90851-L1) ADAPT ADU —— — TN726 C2 ● —— — RSS232 —— .
SYSTEM 25 PART OF CABINET OCTOPUS CABLE PART OF SIP —— — ZTN79 C2 ATL ● LINE CP —— — Y ADAPT — — — (WP90851-L1) TN726 —— — W1 B1 DATA C2 ● LINE CP —— — —— — RSS232 LEGEND : WP90851-L1 - E1 - C1 - C2 - PI - WI - Z3A5 ADU - SIP ADAPT.
SYSTEM 25 CABINET TN726 MADU C10 W2 C11/C12 HOST COMPUTER OR TERMINALS LEGEND : TN726 – DATA LINE CP MADU – MULTIPLE ASYNCHRONOUS DATA UNIT (PEC 2169-005) SINGLE UNIT ASSEMBLY (8 ADU PORTS) W2 –.
TO RS-232C DEVICE OPTIONAL SINGLE-LINE AC POWER OUTLET 2012D POWER TRANSFORMER 400B2 ADAPTER WALL JACK 248B ADAPTER D6AP-87 CORD 4-PAIR D8W CORD (PEC 2725-07G) D8AM-87 CROSSOVER CORD (REQUIRED IF THIS.
SECTION 5—TECHNICAL SPECIFICATIONS This section provides information on the technical characteristics and capacities of the system. Some items covered here are discussed elsewhere in the manual but are repeated here for ease of reference.
Hardware And Software Parameters The following is a listing of maximums for hardware and software parameters. ITEM TOTAL Attendant Consoles Direct Trunk Termination 2 Direct Extension Selector 2 Autom.
Hardware And Software Parameters (Contd) ITEM TOTAL Direct Group Calling (DGC) Groups 32 Members per group 10 Emergency Transfer Units (ETUs) 4 Voice Terminals per ETU 5 Modem Pool Circuit Packs per c.
Hardware And Software Parameters (Contd) ITEM TOTAL Traffic Data ● Simultaneous 2-Party Conversations 115 ● Call Capacity –CCS/Hou r 4140 –Busy Hour Call Capacity 2500 Reliability ● Mean Tim.
Unit Loads A cabinet can supply no more than 80 unit loads of 48 volt power (a unit load is defined as 44 mA). Unit loading is determined by the terminal connected to the port circuits. The following table lists unit loads for various terminals. UNIT LOADS (Note) EQUIPMENT CIRCUIT UNIT LOAD PACK PER PORT 2500 Voice Terminals ZTN78 0.
Cable Distance Limitations The following specifications provide allowable cabling distances for the following devices: ● Single-Line Voice Terminals ● Multiline Voice Terminals ● Data Terminals (RS-232) Connected to Asynchronous Data Units (ADUs).
Multiline Voice Terminals SUPPORTING CIRCUIT PACK ZTN79 (7300H Series– in-building or out-of-building, no off-premises) 24-GAUGE WIRE (0.5106mm) FEET 2,000 (Note) METERS 610 TN735 (in-building MET Sets only ) 1,000 305 Note: Requires local power beyond 1,000 feet.
Data Terminals (RS-232) Connected To Asynchronous Data Units DATA RATE ● 300 bps ● 1,200 bps ● 2,000 bps ● 4,800 bps ● 9600 bps ● 19,200 bps 24-GAUGE WIRE (0.
Tones The following call progress tones are generated by the system: TONE FREQUENCY PATTERN (In Milliseconds) Busy Tone 480 Hz + 620 Hz 500 on, 500 off; repeated Confirmation Tone 350 HZ + 440 HZ 100 .
Port Specifications The following tables provides interface specifications for System 25 line and trunk port circuits: supported by System 25: DATA TERMINAL PORTS (Note) STATION TYPE CIRCUIT PACK DATA.
Port Specifications (Contd) DATA TERMINALS (Do Not Require Local Power) DATA REQUIRES Z3A1 REQUIRES TERMINAL or Z3A2 ADU Z3A4 ADU AT&T 4410 X 4415 X 51OA X ADMs 3A X 31 X ADDS Viewpoint * X ConCep.
Port Specifications (Contd) VOICE TERMINAL PORTS STATION TYPE CIRCUIT PACK SPECIFICATIONS Tip and Ring Tip Ring Line Single-Line Sets (ZTN78) ● l-Pair Interface (Tip and Ring) (Analog) ● Analog signals modulated over DC loop ● Loop Voltage: 24 V dc ● Signaling: Dual Tone Multifrequency (DTMF) only ● REN (max.
Port Specifications (Contd) VOICE TERMINAL PORTS (Contd) STATION TYPE CIRCUIT PACK SPECIFICATIONS MET Sets MET Line (Hybrid) (TN735) ● 3-Pair Interface l-Voice pair 2-Control pairs ● Analog Voice,.
Port Specifications (Contd) TRUNK PORTS TRUNK TYPE CIRCUIT PACK SPECIFICATIONS Auxiliary Trunk TN763 ● Capacity: 4 Circuits ● 3-pair interface: Voice (T,R), Signaling (S, S1), Status (SZ, SZ1) Dir.
Port Specifications (Contd) TRUNK PORTS TRUNK TYPE CIRCUIT PACK SPECIFICATIONS Ground Start ZTN76 ● Capacity: 8 Circuits Trunk ● 2-Wire (600 Ohms or RC Balance) Transmission ● Network Signaling:.
Recommended Central Office Trunk Facilities The following table provides recommendations for CO trunks based on the number of voice terminals in the system and the calling traffic.
Analog Transmission Characteristics Frequency Response: (Station-To-Station or Station-To-CO-Trunk, relative to loss at 1 kHz) FREQUENCY 60 Hz 200 Hz 300-3000 Hz 3200 Hz 3400 Hz Insertion Loss: LOSS >20 dB <5 dB <1 dB <1.
Analog Transmission Characteristics (Contd) Sampling Rate: 8 kHz Terminating Impedance: 600 ohms Trunk Balance Impedance: 600 ohms or Complex Z (selectable) Echo Return Loss: The echo return loss of the switching equipment is infinite.
SECTION 6—ENVIRONMENTAL REQUIREMENTS This section provides information on floor and wall space requirements for System 25 cabinets and associated peripheral equipment. Also included are specifications for temperature, humidity, air purity, lighting, electrical noise (RFI) suppression, power, grounding and lightning protection.
SYSTEM CABINETS (FOOTPRINT) FRONT NOTE 3 BACKBOARD TERMINATION FIELD (NOTE 4) TABLE NOTES : 1. 115V AC, 60 Hz, 15 AMP OUTLETS (HUBBELL 5262 OR EQUIVALENT) MUST BE LOCATED WITHIN SIX FEET (1.8 m) OF SYSTEM CABINETS. 2. MULTIPLE CABINET SYSTEMS REQUIRE TWO QUAD OUTLETS, SINGLE CABINET SYSTEMS REQUIRE ONE QUAD OUTLET.
QUAD AC OUTLETS Figure 6-2. Typical System 25 Equipment Area Elevation Plan 6- 3.
Table Top Space The following system equipment requires (customer provided) table top space in the equipment area: ● System Cabinets - Each cabinet is 13 inches high, 17 inches wide, and 21 inches deep. A three cabinet system requires a vertical space of approximately 40 inches and a 17 inch by 21 inch table top space.
Air Purity The cabinet should not be installed in an area where the air may be contaminated with any of the following: ● Excessive dust, lint, carbon particles, paper fiber contaminants, or metalli .
AC Power Requirements ● The System 25 power service shall be a dedicated branch circuit with no other equipment served (See Figure 6-3. ) ● Each cabinet requires 500 Watts at 115V ac (maximum) ●.
TWO SEPARATELY FUSEO 15 AMP CIRCUITS ITE: QP1 - B015 TWO 15 AMP CKT BAKA OR APPROVED EQUIVALENT NEUTRAL INSULATED FROM LOAD ENTER LOAD CENTER SINGLE POINT / TO 240 VAC 30 AMP. SINGLE PHASE MAIN GROUND (GREEN) 4“ BOX (RACO 230 OR EQUIVALENT) HUBBELL RECPTS.
Grounding Connection of an approved ground to the system cabinets is essential. An approved ground may consist of any of the following: ● Grounded Building Steel - The metal frame of the building.
SECTION 7—PARTS INFORMATION This section contains information that may assist you in cross referencing Apparatus Codes, Comcodes and Price Element Codes (PECs). The first table is grouped by descriptive Price Element Codes (PEC). The second table is arranged by component codes (COMCODE).
PEC DESCRIPTION APPARATUS CODE 62502 62503 62504 62505 62506 Part of: 62506 62506 62507 62508 62509 Part of: 62509 62509 62509 62509 62510 Part of: 62510 62510 62510 62511 Part of: 62511 62511 62512 P.
COMCODE PEC 62513 Part of: 62513 62513 62513 62514 Part of: 62514 62514 62515 Part of: 62515 62515 62515 62515 62515 62515 62515 62515 62515 62515 62518 62519 Part of: 62519 62519 62519 62519 62520 Pa.
PEC 63118† 63119† 63123† 63130† 1020-S90 1020-S91 1203-020 2169-001 2169-004 21691 Part of: 21691 21691 21691 2301-SAA 2610-001 2614-100 2720-05P 2720-05X 2720-06X 2724-30C 2724-38X 2725-07G 2.
PEC DESCRIPTION APPARATUS CODE COMCODE 2750-A24 2750-A25 2750-T05 2781-JDX 2782-JA1 2782-JA2 2782-JC1 2783-JDX 3100-1TD 3100-TWR 3178-SYS * 3100-2TD 3100-ORD 3100-ORW 3100-2RD * 1121-050 1140-010 Mod/.
PE C DESCRIPTION APPARATUS CODE COMCODE 3141-BIS Part of: 3141-BIS 3141-BIS 3143-12M 3160-111 (MAC30 Att) 3161-172 (MAC30 Att) 3161-161 3162-412 3162-417 (MAC30 Att) 3162-BIS 3162-DIS 3163-HFU 3164-HF.
PEC DESCRIPTION APPARATUS CODE COMCODE 8310-001 AC Power Surge 402988950 Suppressor TII Model 428 Miscellaneous No PEC Fanning Strip 50A 105196604 No PEC Block, Connector 110 Female 103756334 No PEC B.
Parts Listed by COMCODE Throughout the following table, “part of” is abbreviated as “P/O.” COMCODE PEC DESCRIPTION APPARATUS CODE 100009968 P/O 62511 Auxiliary Trunk Block Conn 66E3-25 Interfa.
COMCOD E PEC DESCRIPTION APPARATUS CODE 103557062 103557112 103557161 103558916 103756334 103786786 103786802 103786828 103810586 103814356 103823555 103842050 103843538 103848859 103870267 103870416 .
COMCOD E PE C DESCRIPTION APPARATUS CODE 103881421 103942146 103942857 103963310 103963963 103964185 103965232 103965240 103965257 103965265 103965281 103965299 103965315 103965323 103966255 103969424.
COMCODE PEC DESCRIPTION APPARATUS CODE 103981981 103982005 103982658 103982740 103984118 104010061 104152558 104154430 104174750 104174768 104246616 105012637 105012645 105031181 105105506 105105514 1.
COMCODE 105335657 105339584 105341218 105341382 105355374 402988950 403242639 403613003 403836620 403864150 403954761 403957129 403961519 404079428 404079436 405010612 405010620 405177791 405193186 PE.
COMCODE PEC DESCRIPTION APPARATUS CODE 405462904 P/O 62520 527840003 2610-001 527840102 2614-100 845412956 No PEC 845416379 P/O 6250-011 P/O 6250-012 P/O 62501 845416635 P/O 6250-011 P/O 6250-012 P/O .
SECTION 8—REFERENCE DOCUMENTATION System 25 is supported by a complete set of basic and supplementary documentation and optional software. This section provides a brief summary of the available material. Manuals not specified for Release 1 Version 2 (R1V2) cover both R1V1 and R1V2.
Optional Software ● Advanced Administration Software Package ● Communications Access Manager Software Package ● AT&T STARLAN NETW0RK ACCESS Software Package Descriptions of Basic Manuals Administration Manual Provides the information necessary to initialize a system and to perform on-going system administration.
Planning Manual The document is a presale workbook used by the Account Team and customer to define a set of orderable equipment that will meet the customer’s specific requirements.
SECTION 9—GLOSSARY This section provides explanations for acronyms and definitions of terms used in this manual. ADU: (Asynchronous Data Unit) ARS: (Automatic Route Selection) ASCII: (American Standard Code for Information Exchange) Administer To access and change the parameters associated with the services or features of the system.
Attendant Console ● Direct Trunk or Switched Loop Attendant Console: An electronic call-handling position with pushbutton control. Used by attendants to answer and place calls and to manage and monitor some system operations.
Bus, Time Division Multiplex See Time Division Multiplex Bus. CCS (Hundred Call Seconds) A traffic-measuring unit that expresses the load of one or more traffic-handling devices. A device used for 1 hour without interruption generates 36 CCS which equals 1 erlang (see Erlang).
Console See Attendant Console. Coverage Call A call that is redirected from the called party’s personal dial code to an alternate answering position when certain criteria are met. Coverage Path The order in which calls are redirected to alternate answering positions.
Data Module A data interface device (i.e., Asynchronous Data Unit) providing a standard interface between customer provided data equipment and a data port on the switch. Data Terminal Equipment (DTE) DTE refers to a specific RS-232C connector termination designed to connect directly to a DCE type connection.
Facility (physical) A transmission channel to another switching system; to a Central Office for example. By application, examples are: ● CO Trunks ● FX Trunks ● WATS Trunks ● OCC Trunks ● Tie Trunks By technical type these include loop start, ground start, DID, automatic ringdown, etc.
Home Numbering Plan Area Code (HNPA) The local area code. The area code does not have to be dialed to call numbers within the local geographical area. Immediate-Start Tie Trunk After establishing a co.
Modem Pooling Provides shared-use conversion resources that eliminate the need for a dedicated modem when an analog data end point accesses, or is accessed by, an analog line or trunk. Multifeature Single-Line Voice Terminal A terminal served by one tip and ring voice circuit and having additional buttons for activating features.
Parameter Any set of physical properties whose values determine the characteristics or behavior of something Peripheral Equipment System Administration Terminal (SAT), SMDR Output device such as a SMDR Printer or a Call Accounting System, Digital Tape Unit (DTU).
Protocol A set of conventions or rules governing the format and timing of message exchanges to control data movement and correction of errors. Public Network The network that can be openly accessed by all customers for local or long-distance calling. Queue An ordered sequence of calls waiting to be processed.
Software A set of computer programs that accomplish one or more tasks. Split A condition whereby a caller is temporarily separated from a connection with the attendant. This split condition automatically occurs when the attendant, active on a call, presses the Start button.
Tie Trunk A telecommunications channel that directly connects two private switching systems. Time Division Multiplex Bus A special bus that is time shared by preallocating short time slots to each transmitter on a regular basis.
Write Operation The processor putting information onto a storage medium such as magnetic tape. 800 Service A service that allows incoming calls from a certain area or areas to an assigned number for a flat-rate charge based on usage.
INDEX 500 Voice Terminals, 4-12 Auxiliary Equipment (Contd.) 55A1 Key, 4-40 Connections, 4-51 Auxiliary Trunk (TN763), 3-35 Abbreviated Alerting, 2-132 AC Power Requirements, 6-6 Access Equipment, Tru.
Connections, (Contd.) Peripheral Equipment, 4-51 Voice Terminal and Adjuncts, 4-51 Connectivity, 4-46 Figures, 4-51 Console, Direct Trunk Attendant, 2-13 Selector, 2-25 Switched Loop Attendant, 2–17.
Line (Contd.) Status and I-Use Indications, 2-157 Lines, Personal, 2-184 Loop Start Trunk (ZTN77), 3-18 Maintenance Manual, 8-2 Software, 3-45 System, 2-234 Making a Data Call From Expert Mode, 2-135 .
Speaker, 2-206 Speakerphone Adjunct, 2-207 Speed Dialing, 2-212 Splitting One-Way Automatic, Attendant, 2-47 STARLAN INTERFACE (ZTN84), 3-37 Circuit Pack, 2-216 STARLAN NETWORK Access (V2), 2-215 Admi.
Ein wichtiger Punkt beim Kauf des Geräts AT&T 1987 AT&T (oder sogar vor seinem Kauf) ist das durchlesen seiner Bedienungsanleitung. Dies sollten wir wegen ein paar einfacher Gründe machen:
Wenn Sie AT&T 1987 AT&T noch nicht gekauft haben, ist jetzt ein guter Moment, um sich mit den grundliegenden Daten des Produkts bekannt zu machen. Schauen Sie zuerst die ersten Seiten der Anleitung durch, die Sie oben finden. Dort finden Sie die wichtigsten technischen Daten für AT&T 1987 AT&T - auf diese Weise prüfen Sie, ob das Gerät Ihren Wünschen entspricht. Wenn Sie tiefer in die Benutzeranleitung von AT&T 1987 AT&T reinschauen, lernen Sie alle zugänglichen Produktfunktionen kennen, sowie erhalten Informationen über die Nutzung. Die Informationen, die Sie über AT&T 1987 AT&T erhalten, werden Ihnen bestimmt bei der Kaufentscheidung helfen.
Wenn Sie aber schon AT&T 1987 AT&T besitzen, und noch keine Gelegenheit dazu hatten, die Bedienungsanleitung zu lesen, sollten Sie es aufgrund der oben beschriebenen Gründe machen. Sie erfahren dann, ob Sie die zugänglichen Funktionen richtig genutzt haben, aber auch, ob Sie keine Fehler begangen haben, die den Nutzungszeitraum von AT&T 1987 AT&T verkürzen könnten.
Jedoch ist die eine der wichtigsten Rollen, die eine Bedienungsanleitung für den Nutzer spielt, die Hilfe bei der Lösung von Problemen mit AT&T 1987 AT&T. Sie finden dort fast immer Troubleshooting, also die am häufigsten auftauchenden Störungen und Mängel bei AT&T 1987 AT&T gemeinsam mit Hinweisen bezüglich der Arten ihrer Lösung. Sogar wenn es Ihnen nicht gelingen sollte das Problem alleine zu bewältigen, die Anleitung zeigt Ihnen die weitere Vorgehensweise – den Kontakt zur Kundenberatung oder dem naheliegenden Service.
