ATT DEFINITY Communications System Generic 3 Instructions Manual

Voice Management Overview
Issue  3   March 1996
2-5
nRecorded Announcement
nRecorded Telephone Dictation Access
nRemote Access
nRestriction — Controlle d
nRestriction — Fully Restricted Service
nRestriction — Miscellaneous Terminal
nRestriction — Miscellaneous Trunk
nRestriction — Toll 
nRestriction — Toll/Code
nRestriction — Voice Terminal — Inward
nRestriction — Voice Terminal — Manual Terminating Line
nRestriction — Voice Terminal — Origination
nRestriction — Voice Terminal — Outward
nRestriction —...

Functional Description
2-6Issue  3   March 1996 
nTrunk-to-Trunk Transfer
nVoice Message Retrieval
nVoice Terminal Display
nVoice Terminal Alerting O ptions
Specific Attendant Features are listed below.
nDCS Attendant Control of Trunk Group Ac cess
nDCS Attendant Display
nDCS Attendant Direct Trunk Group Selection
nAttendant Auto-Manual Splitting
nAttendant Control of Trunk Group Access
nAttendant Call Waiting
nAttendant Direct Extension Selection With Busy Lamp Field
nAttendant Direct Trunk Group...

Data Management
Issue  3   March 1996
2-7
Data Management
The DEFI NI TY switch is a private digital switching system that permits 
connections with a variety of data e quipment. Data terminals, printers, g raphics, 
facsimile equipment, and computers can be connected to the switch through 
various protocols or interfaces. The physical connection can be through a di gital 
data module, analog modem, or access endpoint.
For use outside the United States, modems that  comply with the ITU-T 108.1 
signaling...

Functional Description
2-8Issue  3   March 1996 
The MPDM provides a DCE asynchronous or synchronous interface for 
connection to data terminals, Call Detail Recording (CDR) output devices, 
DEFI NI TY Com munications System Generic 3 Management Terminals (G3-MT), 
Generic 3 Management Ap plication Systems (G3-MA), on-premises (in building) 
administration terminals, and host computers. The MPDM can be preset in the 
factory to provide the following interfaces:  EIA RS-232C, RS-449, V.35, and 
RS-366 to...

Data Management
Issue  3   March 1996
2-9
transmission at rates of 48000, 56000, and 64000 bps. The 7500B only provides 
half-duplex emulation at a rate of 56000 bps. Regardless of the c onfiguration, the 
7500B provides no voice functions and is not used with voice terminals.
The ISDN ADM may be used with asynchronous DTE as a data stand for 
7500-series BRI voice terminals. Consisting of a b oard located inside the BRI 
voice terminal, the ISDN ADM allows  simultaneous voice and d ata transmissions...

Functional Description
2-10Issue  3   March 1996 
receive incoming calls or route outgoing calls). An access endpoint is used 
primarily to support devices, switches, or services that have a trunk interface but 
do not support signaling for the trunk. An access endpoint may be d esignated as 
the originating (local) endpoint or destination en d point in an Administered 
Connection. The status of an access endpoint can be displayed by entering the 
status access-endpoint command from the G3-MT/G3-MA or a...

Data Management
Issue  3   March 1996
2-11
The system uses twiste d-p air standard building wiring and eight-pin modular wall 
jacks. Each wall jack is a single outlet that can handle simultaneous voice and 
data information.
The d i gital switch, data modules, DCP, twisted-pair wiring, modular wall jacks, 
and switched data features give the system its unique capabilities. These 
capabilities merge the business office data processing and telecommunications 
functions into a single system.
Figure 2-1....

Functional Description
2-12Issue  3   March 1996 
nLocal Area Networks (LANs) 
The system provides this capability by connecting communication 
devices physically located within a local-area or campus-like environment.
These include conventional, semi-intelligent, and intelligent data 
terminals, personal computers, host computers, and virtually any device 
with the proper communications interface.
The centralized network provides circ uit-switched p aths using twisted-pair 
building cable that extends...

Data Management
Issue  3   March 1996
2-13
Figure 2-2. System Networking Configurations
Data Communications Protocols and Interfaces
A protocol is a set of conventions or rules that governs how data is transmitted 
and received. The rules generally cover the following:
nPhysical interface
nMechanical interface
nElectrical interface
nFraming
ANALOG - PRIVATE
NETWORK FACILITIES
EPSCS
ETN
PL
TANDEM TIE TRUNKS
DIGITAL - PRIVATE
NETWORK FACILITIES
ANALOG - PUBLIC
NETWORK FACILITIES
DIGITAL SERVICE DATAPHONE...

Functional Description
2-14Issue  3   March 1996 
nError detection and control
Communications protocols are designed to meet the transmission requirements 
for specific data exchange and data communications equipment. These 
communications protocols are sponsored by a national or international 
organization or a major corporation. The system e quipment and communications 
processing software provide the following protocols:
nISDN Protocols
nEIA RS-232C
nRS-449
nRS-366
nStandard Serial Interface (SSI)...