ATT System 25 Reference Manual

							FEATURES AND SERVICES
Automatic Intercom: Calls on Automatic Intercom buttons on the principal station are not
accessible from bridged call appearances.
Automatic Route Selection (ARS): When a station user originates a call on a BA button and
dials the ARS access code. the call is completed according to the restrictions assigned to
that station. The restrictions of the principal and the other bridging stations have no effect.
Callback Queuing: Calls originated on Bridged Access (BA) buttons can be queued. On
callback attempts, only the originator will be rung; all other appearances will only flash. Any
appearance in the bridging arrangement can be used to drop a queued call, if no other
station is off-hook.
If both principal and bridging users are off-hook on a call to a busy facility, only the first one
off-hook can queue the call.
Calling Restrictions:If a station goes off-hook on a BA button and dials a number, the call
is completed according to the bridging station’s restrictions and characteristics, not the
principal station’s.
Two bridging stations or a bridging station and its principal station can attempt to originate a
call on their corresponding SA and BA buttons at the same time. This call is completed
according to the calling restrictions of the station that went off-hook first.
Conference: A station user can make conference calls on BA buttons using the normal
conference feature operations.When a call is held for conference by pressing the
CONFERENCE button, an idle System Access (SA) button or an idle System Access-
Originate Only button, if available, is automatically selected by the system for placing the new
call. If neither of these button types is idle, the user can manually select a BA button or any
other call appearance button on which to place the new call.
While a bridging station or principal is in the process of setting up a conference call, the
green status LED of the held call’s BA button or SA button has a broken flutter indication.
Other bridging or principal stations that are actively bridged to the call have steadily lighted
status LEDs; stations that are not active on the call have winking green status LEDs
(indicating that the appearance is on hold).
Coverage—Individual and Group: An incoming call is given individual and/or group coverage
according to the coverage specified for the principal.Calls appearing on BA buttons at the
bridging stations are not extended to the coverage specified for those stations.
Display: Call descriptor “ 
^ ”appears in position 15 of Screen 1 for a call containing more
than two active parties; position 16 contains the actual number of bridgers. The number of
parties is displayed at each terminal in a bridged call and is updated as the status changes.
Screen 1324 Tango,S^4
The “ 
^ ” and the number of bridging parties overwrite whatever was in positions 15 and 16
of the current display.
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							Bridging of System Access Buttons
Direct Group Calling (OGC): DGC calls arriving on SA buttons at a principal station can
receive bridging treatment at a bridging station.
Direct Station Selection (DSS): Calls from DSS or Flex DSS buttons on the principal station
are not accessible from bridged appearances.
Exclusion: If a principal or bridging station presses the EXCLUSION button during a call, all
other internal stations on the call will be dropped.In addition, Exclusion will prevent any
other internal station from bridging onto the call.
Following: Sign-in and sign-out procedures can be performed at the destination station on
either a SA button or a BA button.However, since Following calls always arrive on SA
buttons, the destination station must have at least one SA button.
Following calls arriving at a principal SA button are accessible at bridged call appearances of
that button.
Forwarding: This feature is station-oriented.It can be activated and deactivated for a
forwarding principal station only at a SA button on that station. If forwarding is activated at a
BA button on a bridging station, it affects calls to that station only.
Hands-Free Answer on Intercom (HFAI): If a station has HFAI activated, internal calls
arriving at this station on a SA button will auto-answer.However, calls arriving at this station
on a BA button will ring according to the administered ring option and will not auto-answer.
Hold: A principal or bridging station user who is active on a bridged call can hold the call by
pressing the HOLD button.If there is still a bridging or principal station active on the call,
the green status LEDs of all associated SA/BA buttons remain lighted steadily. If no other
bridging or principal station is active on the call, the green status LEDs of all associated
SA/BA buttons wink.
Any of the principal or bridging stations can enter the held call, unless Exclusion has been
activated or the maximum number of parties are already connected to the conversation.
Last Number Dialed: The Last Number Dialed feature saves numbers called from either SA
or BA buttons.
Line Status and I-Use Indications: The meanings of green line status and red I-use
indications on BA buttons are consistent with all other System 25 operation.
Message Waiting: Stations with bridged appearances can have Coverage Message Waiting
(COVER-MSG) buttons.By using the COVER-MSG button, the bridging user can check
and/or change the status of the principal’s Message LED. If the bridging station also serves
as an Individual Coverage receiver, the same COVER-MSG button can be used for bridging
and coverage messaging needs. Use of the COVER-MSG button is identical to current
System 25 operation.
Night Service:Directed Night Service calls ring immediately at an available SA button on the
Night Service station, regardless of the administered ring option. Bridged appearances of
this SA button will flash but not ring, regardless of the administered ring option.
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							FEATURES AND SERVICES
Park: If a station is active on a bridged call appearance and activates Park, the call is parked
on the Personal Dial Code (PDC) number of the principal station, not of the bridging station.
If the parked call is not answered, it will return on the principal’s SA button.
Personal Speed Dialing: Personal Speed Dialing is a station-oriented feature. If a station
dials a Personal Speed Dialing code (#20-#39) while off-hook on a BA button, the system
will handle this call exactly as if the code was dialed from this station’s SA button.
Pickup: Pickup is a station-oriented feature.Thus, calls ringing at a principal SA button can
be picked up by members of the principal’s Pickup Group; calls ringing at a BA button can be
picked up by members of the bridging station’s Pickup Group. If a user dials the Group
Pickup access code while active on a BA button, the system interprets this as an attempt to
pick up a call in the Pickup Group of the bridging station, not of the principal station.
Calls ringing at either a principal SA button or an associated BA button can be picked up by
using the Directed Pickup feature.
Pooled Facility—Dial Access: A station originating a call on a BA button and using a facility
access code is granted access to that pool according to the Calling Restrictions assigned to
the bridging station, not the principal station.
Prime Line Preference: A BA button can be specified as the preferred line for outgoing calls
when the station goes off-hook.
Program: A bridging station user can program only the Personal Speed Dialing codes, REP
DIAL buttons, and FLEX DSS buttons associated with the bridging station, not with the
principal station.
Repertory Dialing: If a station user selects a bridged appearance for an outgoing call and
then depresses a REP DIAL button, the digits programmed into the button are outpulsed as
they would be if the user had selected one of the station’s own SA buttons.
Ringing Line Preference:If a station has ringing line preference enabled and has a ringing
bridged call appearance, an on-hook user is connected to the bridged appearance if the set
goes off-hook. This is the same as current System 25 operation.
Send All Calls: The principal station can be administered so that pressing the SEND ALL
CALLS button will send ringing for incoming calls to its coverage stations only, to its bridging
stations only, or to both.
If ringing is sent to a BA button via Send All Calls, and if the BA button is administered to not
receive ringing, the call will flash (but not ring) at the BA button. If ringing is sent to a BA
button via Send All Calls, and if the BA button is administered to receive ringing (immediate
or delayed), then the call will ring immediately on the BA button.
Station Message Detail Recording (SMDR): When an outside call is answered or originated
at a BA button, the SMDR record for this call will report the bridging station’s PDC number
under the STN column and the principal station’s PDC number under the PDC column. If the
Call Accountability feature is used when originating a call at a BA button, the PDC column
will contain the accountable (entered) PDC number in place of the principal’s PDC.
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							Bridging of System Access Buttons
If two bridged stations attempt to originate a call at the same time, and if the call is
completed, the PDC number of the station that dialed the first digit is placed in the SMDR
records under the STN column.
Transfer: A call can be transferred from a bridged call appearance using the usual transfer
operations. When a call is held for transfer by pressing the TRANSFER button, an idle
System Access button or an idle System Access-Originate Only button, if available, is
automatically selected by the system for placing the new call. If neither of these appearance
types is idle, the user can manually select a BA button or any other call button on which to
place the new call.
The transfer operation and status indications of the principal’s SA button (and its
corresponding BA buttons) are similar to Personal Line operation with the following
exceptions:Calls can be from/to an inside station or from/to an outside location, and after
the transfer is completed (transferring station goes on-hook) the call will stay at the
principal’s SA button and its BA buttons only if one or more of these stations is bridged to
the call. Otherwise, the call will be removed. An on-hold bridging station or principal is not
considered to be bridged to the call.
Administration Requirements
Voice Terminal Port, Bridging Station:
l Assign a BA button for each SA button on the principal station.
l Assign ringing option for each BA button (no ring, immediate ring, or delayed ring;
default = immediate ring).
Voice Terminal Port, Principal Station:
l Assign ringing for each SA button (no ring, immediate ring, or delayed ring; default =
immediate ring).
l Send ringing to bridged appearances on no answer? (yes or no; default = yes).
l Send ringing to bridged appearances on busy (off-hook)? (yes or no; default = yes).
l Modify the assignment of the Send All Calls button:
Abbreviated ring reminder (yes or no)
Send ringing to bridging stations or coverage stations or both; default = both.
System:
l Search for stations that have bridged call appearances of a principal
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							FEATURES AND SERVICES
Busy-To-Idle Reminder
Description
Busy-to-Idle Reminder alerts a multiline voice terminal user by a single ring as soon as a
busy internal station, DGC group, or facility (trunk group) becomes available. The feature
can be activated only for stations, DGC groups, and trunk groups represented on the
terminal by DSS, FLEX DSS, AUTO ICOM, and FACILITY buttons.
Before making a call to a station, the multiline voice terminal user can check the green status
LED of the station button. If it is lit, the station party is off-hook. To be alerted when the
party hangs up and is available again, the user (while on-hook), presses the button of the
station. The red I-use LED lights, indicating that Busy-to-Idle Reminder is in effect. When
the other party hangs up, the user’s terminal rings once.The user simply goes off-hook, and
the station is called; the user does not have to press the button again.
If the user calls a station by pressing a FLEX DSS or DSS, button and receives busy tone,
the user must hang up before activating Busy-to-Idle Reminder.
When all the trunks in a pool represented by a FACILITY button are busy, the green status
LED is lighted. The user can activate Busy-to-Idle Reminder in the same way as for a station
call, by pressing the FACILITY button while on-hook. When a trunk becomes idle, the
terminal rings once. The user goes off-hook and if the trunk is still available is automatically
connected to the trunk. To complete the call the user dials the desired outside number.
Considerations
Busy-to-Idle Reminder gives the multiline voice terminal user a way to get quick access to a
station or trunk group that has just become available after being busy. Access to the station
or trunk is not reserved for the user who activates this feature; any other user has equal
access to the idle facilities.
On some multiline voice terminals, FLEX DSS, DSS, AUTO ICOM, and FACILITY buttons do
not have status and I-use LEDs. This makes Busy-to-Idle Reminder less convenient to use
because the user must first call the facility to determine if it is available. If it is not, the user
activates the feature by hanging up and pressing the button again. When the reminder ring
sounds, the user must then remember which button was used to initiate the call.
Interactions
Display: When a user receives this signal, the display format is the same as when the call
was originally placed, except that idle descriptor“I” appears in position 1. Number and
name fields are displaced to the right.
Busy-to-Idle Reminder cannot be used with the Last Number Dialed, Personal Line, or
Repertory Dialing features.
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							Call Accountability
Call Accountability
Description
This feature allows calls made by system users from other users’ stations to be charged to
the callers’ own “home” Personal Dial Code (PDC).
To charge a call to the home PDC, the user dials ## followed by the PDC immediately upon
receiving first dial tone to place a call. When second dial tone is returned, the user dials the
desired number in the normal way.
After completion of the call, the SMDR record will reflect the “accountable” PDC (that is, the
caller) in the “PDC” field, and the PDC of the voice terminal
Considerations
Call Accountability, if used consistently, helps to ensure
accurately to the personnel who incur the costs. Users doused in the “STN” field.
that calling costs are attributed
not use this feature when calling
from their own stations or when making inside calls from any station.
Interactions
All of the following conditions apply only when a user is calling from another user’s station.
Account Code Entry, Forced: The account code entry can be made before or after the Call
Accountability entry. Dial tone is returned to the user after either entry.
Account Code Entry, Optional:This feature can be used on the same call with Call
Accountability.
Call Accounting System:The caller’s PDC that is entered by the Call Accountability
procedure is integrated into the reports generated by Call Accounting systems.
Callback Queuing: Any call accountability information entered before activation of queuing is
saved for SMDR.
Display: The characters and digits dialed to charge a
called number.
Pooled Facility—Direct Access: When a call is made
must be dialed before pressing the button.
Remote Access: Remote Access callers cannot use Callcall are displayed,
using a FACILITY
Accountability.followed by the
button, ##PDC
Repertory Dialing:When a call is made using a REP DIAL button, ##PDC must be dialed
before pressing the button.
Speed Dialing:When a call is made using Speed Dialing, ##PDC must be dialed before
dialing the Speed Dialing code.
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							FEATURES AND SERVICES
Call Accounting System (CAS)
Description
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 2 of the Digital Switch’s CPU/MEM Circuit
Pack. This data can be fed to a Call Accounting System (CAS) for preparing a variety of cost
estimate reports and for providing management and directory type services. For additional
information on the call data available at Interface Port 2, refer to the Station Message Detail
Recording (SMDR) feature description.
Three station features of System 25 are also related to Call Accounting and are covered in
separate feature descriptions.Account Code Entry, both Forced and Optional, allows
individual voice terminal users to associate specific account codes with their calls, when
necessary. Call Accountability provides users with the means to properly identify calls they
make from stations other than their own. The information gathered from these two features
is part of the data output from the processor to the CAS.
Two types of CASs can be used with System 25:
l CAS Model 200, 300, 500, or 2000 Software Package associated with an AT&T
Personal Computer (PC) 6300.
l CAS Model 200, 300, 500, or 2000 Software Package associated with a Master
Controller (UNIX PC).
CAS Models 200, 300, 500, and 2000:
The System 25 SMDR interface provides direct output to the CAS software running on either
an AT&T Personal Computer equipped with MS-DOS (V2.11 or later) or a UNIX PC Master
Controller. CAS calculates the cost of calls and provides basic and sophisticated call reports.
After a telephone call is completed, System 25 sends a call record to the AT&T Personal
Computer via the SMDR interface channel. The PC must be equipped with and running CAS
software. Call records are collected by the PC and held in a buffer until they are processed.
When a call record is processed, a cost is calculated and assigned to it. That cost, along
with other call record information, is then stored on a hard disk for subsequent retrieval.
Two modes of operation are available for PC operation:
l Dedicated Mode: The PC is dedicated to one and only one task—processing call
records.
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							Call Accounting System (CAS)
l Multi-Function Mode: Allows the user to print reports, edit files, and run other PC-based
programs while the CAS continues to collect and buffer call records in the background. The
user must enter the Dedicated Mode to process calls and generate reports.
The CAS performs three main functions; (1) call record processing, (2) report generation, and (3)
CAS system management. In addition, a limited directory lookup and message center is provided.
The following is a brief description of each function:
1.
2.
3.
4.
Process Calls: Involves screening call records, calculating the cost of valid calls, and storing
the call records.
Generate Reports: Allows the user to print the stored call record information organized in
one of several different ways. Users can select a report or set up their own special
combination of reports from the following:
l Summary Reports—A collection of reports that condense and summarize call
record information by total number of calls, duration, and cost. The reports can be
organized by department, call type, cost center, trunk, extension, cost, duration,
time of day, date, and account code.
l Organization Detail Report—A detailed report of each call record in the system,
sorted by department, cost center, and extension.
l Selection Report—This report can contain at a user’s option, summary or detailed
information based on any combination of the following items: time of day, date,
cost, duration, extension, access code, account code, dialed number, call type,
department, or cost center.
l Account Code Detailed Report—A detailed report on call records sorted by account
code. This report can be used for billing clients for calls made in their behalf.
l Preselected Report—Allows up to five predefine reports, which can include any
of the above mentioned reports. These reports can run upon request or at a
specified time and date.
System Management: Allows the user to perform several functions. These include editing
the table of departments, cost centers, and extensions; setting up account codes; defining
preselected reports; and keeping call rate information up to date. System configuration may
be changed. This allows the user to inform the CAS of changes in System 25 (e.g., dial
access codes, trunks) or changes in charge rates. System housekeeping may also be
performed. This includes establishing passwords, deleting call records, determining call
processing options, and performing various disk maintenance operations.
Directory Lookup and Message Center: Allows the user to look up anyone by last name, first
name, or extension. Messages can be recorded for individuals and can be printed or
displayed.
November 19952-77 
						

							Features and Services
The following table summarizes CAS station and account capacities.
AT&T CALL ACCOUNTING SYSTEMS
CAS ModelStationsAccount Codes
2001005000
300
1505000
5005005000
2000200015000
Refer to the CAS documentation supplied with the software package for additional information.
Considerations
The CAS provides customers with an efficient tool to control and manage their telephone usage and
costs. The information available can be used to facilitate cost allocation, traffic analysis, and abuse
control.
Administration Requirements
System:
l Send SMDR Records to SMDR Port (yes or no; default = yes).
l Minimum length (seconds) of calls that are reported by SMDR (10-255; default = 40).
l Type of SMDR peripheral: CAT or non-CAT (yes = CAT, no = non-CAT; default = non-
CAT).
Hardware Requirements
CAS Model 200, 300, 500, or 2000 applications software must be run on an AT&T personal
computer equipped with MS-DOS (V2.11 or later) or on a UNIX PC Master Controller.
SMDR port parameters areas follows:
l No parity; bit is set to zero.
l 1 start bit, 1 stop bit, and 7 data bits.
l Baud rate defaults to 1200 (can be set to 300).
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							Call Accounting System (CAS)
l DTR (data terminal ready) required from printer.
l RTS (ready to send) and CTS (clear to send) not required.
l No flow control.
Refer to Figures 2-11 and 2-12 for typical CAS connection information.
SYSTEM 25PART OF
CABINETOCTOPUS
CABLE
PART OF
SIP
ZTN130C2Z210A>CPU/MEMADAPT.
C1
355A/AF
ADAPT.CALL
ACCOUNTING
SYSTEM
LEGEND:
C1 - MODULAR CORD (D8W-87) - PEC 2725-07G
C2 - OCTOPUS CABLE (WP90780) - PEC 2720-05P355A ADAPTER -RS-232 PLUG TO M0DULAR JACK - PEC 2750-A24
355AF ADAPTER -RS-232 RECEPTACLE TO MODULAR JACK - PEC 2750-A25
Figure 2-11.Call Accounting System—On-Premises Direct Connections (Sharing Same
AC Outlet)
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