ATT System 25 Reference Manual

OVERVIEW
SYSTEM
CALL ACCOUNTINGCONTROL
SOFTWARE ORRS232COMPLEX
SMDR PRINTER
SYSTEM ADMINISTRATION
TERMINAL OR
RS232
MS-DOS PC WITH
ADVANCEDADMINISTRATION
DIGITAL TAPE UNIT ORRS232
MS-DOS PC WITH
ADVANCEDADMINISTRATION
TRUNK FACILITIES
l DID
l FX
l TIE
l WATS
l COPAGING
l AUXILIARY-DICTATIONEQUIP
SINGLE-LINEANALOG
VOICE TERMINAL
MULTILINE VOICE
TERMINAL AND ATL
CORDED AND CORDLESS
TELEPHONES
DIRECT TRUNK
ATTENDANT CONSOLE ORHYBRID
SWITCHED LOOP
ATTENDANT CONSOLE
l MUSIC SOURCE
l EXTERNAL ALERTANALOGl...

OVERVIEW
be used to set up connections between data terminals, word processors, personal
computers, and host computers.System 25 uses intelligent port circuits equipped with
distributed network processor elements to provide (essentially) nonblocking voice and data
switching.
Voice communications features combine traditional telephone features, such as Transfer and
Hold, with advanced features, such as Individual and Group Coverage, Hands-Free Answer
On Intercom, and Speed Dialing (see Section 2,...

OVERVIEW
— STARLAN NETWORK Access (Release 2 of STARLAN only)
— DS1 Facility interface.
l Networking Capability
— Remote Access
— Tie Trunks
— Tandem Trunking
— Endpoint in Electronic Tandem Network (Tributary only, not Satellite)
— Endpoint of Enhanced Private Switched Communications Services (EPSCS)
— Endpoint of Tandem Tie Trunk Network (TTTN)
— Endpoint of Common Control Switching Arrangement (CCSA)
— DS1 Facility Interface.
Call Handling Capabilities
System 25 can be arranged as a stand-alone system...

OVERVIEW
Business Communications Needs
The remainder of this section describes how System 25’s features may be used to satisfy a
customer’s communications needs. This material may be thought of as the reverse of the
“Features and Services” in Section 2.
The business communications capabilities of the majority of small businesses with more than
30 phones are provided by a PBX. System 25 is a PBX designed to meet the business
communications needs of customers in the 30 to 150 station range.
The...

`OVERVIEW
l The Call Management System provides Automatic Call Distribution (ACD) service and
associated call traffic and agent performance reports.
l Direct Group Calling (DGC) allows incoming calls to be directed to a specific group of
stations. Calls to a DGC group hunt for an idle station in a circular manner, starting
at the station following the last one called.If all group members are busy, calls are
queued and can be sent to a delay announcement.A DGC group can terminate calls
to sales, services,...

OVERVIEW
l Station Hunting provides automatic redirection of incoming calls to an idle member of
a hunt group when the called party is busy.
l Pickup allows a user to answer a call ringing at another terminal. Directed Pickup
allows a user to answer a call ringing at any terminal by dialing the pickup code and
the Personal Dial Code (PDC) of the ringing station. Group Pickup permits calls to
any other terminal in the pickup group to be answered by dialing the group call
pickup code. With Pickup, users do...

OVERVIEW
l Automatic Route Selection provides manager defined routing of calls over the
telecommunications network based on preferred routes (normally the least expensive
route available at the time the call is placed) with capacity for multiple common
carriers and routing through tandem switch points.The user dials a standard Direct
Distance Dialing (DDD) number and the system selects the call route.
l Station Message Detail Recording (SMDR) generates detailed call information on all
incoming and...

OVERVIEW
l Pooled Facility-Dial/Direct Access allows both multiline and single-line voice terminal
users to access a common pool of trunks for outgoing calls by dialing a facility
access code, or, on multiline voice terminals, by pressing a button. This grouping
provides resource pooling, which results in better service with a given number of
trunks.
l Personal Lines provide dedicated outside lines for multiline voice terminal users.
Personal lines are accessed via a dedicated feature button. Up to 16...

OVERVIEW
Efficient internal call termination is supported with the following features.
l Distinctive Ringing provides various patterns of ringing to allow users to distinguish
outside calls, inside calls, callbacks on queued calls, and calls set up at an
associated data terminal.
l Hands-Free Answer on Intercom (HFAI) allows Speakerphone and HFAI terminals to
auto-answer inside or attendant extended calls. With HFAI active, the set generates
a tone burst over its speaker to alert the calling and called...

OVERVIEW
l Circuit switched data communications up to 19,200 bps (RS-232 interface) provide
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 4-pair wiring plan.
Thus an asynchronous terminal or PC can have access to multiple host computers,
remote data bases via a modem pool, and a local area network (STARLAN) via
System 25’s STARLAN...