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ATT DEFINITY Communications System Generic 3 Instructions Manual

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    							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 — Voice Terminal — Termination
    nRingback Queuin g
    nRinger Cutoff
    nRinging Abbreviated and Delayed
    nRotary Dialin g
    nSend All Calls
    nSenderized Operation
    nSingle-Digit Dialing and Mixed Station Numbering
    nStraightforward Outward Completion
    nTemporary Bridged Appearance
    nTenant Partitioning
    nTerminal Translation Initialization
    nTerminating Extension Group
    nThrough Dialing
    nTimed Reminder
    nTouch-Tone Dialin g
    nTransfer
    nTransfer - Outgoing Trunk to Outgoing Trunk Trunk Flash
    nTrunk Group Busy/Warning Indicators to Attendant
    nTrunk Id entification by Attendant 
    						
    							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 Selection
    nAttendant Intrusion (Call Offer)
    nAttendant Override of Diversion Features
    nAttendant Priority Queue
    nAttendant Recall
    nAttendant Release Loop Operation
    nAttendant Serial Callin g
    nAttendant Display
    nConference — Attendant
    nCentralized Attendant Service  (CAS)
    nDial Access to Attendant
    nEmergency Access to the Attendant
    nIndividual Attendant Access
    nInter-PBX Attendant Calls
    nPrivacy — Attendant Lockout
    nTrunk Group Busy/Warning Indicators to Attendant
    nTrunk Id entification By Attendant
    nTimed Reminder and Attendant Timers
    nVisually Impaired Attendant Service (VIAS) 
    						
    							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 procedures are supported. Administration forms are available to 
    support combine d (external) mo dem p ools.
    The system p rovides the ability to option d ata mo dules [or data-like devices such 
    as a Data Line Circuit (DLC)] for Terminal Dialing. Also, data mo dules can be 
    used without Terminal Dialing with host computers, printers, or other such 
    applications. Computer file transfer at a rate of 64 kb ps is possible with the 
    Modular Processor Data Module (MPDM) and the Modular Trunk Data Module 
    (MTDM).
    The family of data modules includes a Wideband Data Module (WDM), Processor 
    Data Mo dule (PDM), a Digital Terminal Data Module (DTDM), a Trunk Data 
    Module (TDM), a Z702AL1-DSU Data Module Base, a 7400A Data Mo dule, a 
    7500B Data Mo dule, an ISDN Asynchronous Data Module (ADM), and a 3270 
    Data Mo dule. The data mo dules are generally more versatile than modems, 
    operate at faster data rates, and provide additional features.
    The WDM provides Wideband (128 kbps plus any multiple of 64 k b ps, up to a 
    total of 1984 kb ps) communications between a Wideband data and dialing 
    interfaces and an ISDN PRI interface. WDM p rovides for extremely high-speed 
    data transmission and is used b y applications ranging from video conferencing 
    to data backup.
    The DTDM provides synchronous or asynchronous data communications to 
    7403D and 7405D digital voice terminal users who have a terminal or personal 
    computer. The DTDM and voice terminal integrate data and voice into the Digital 
    Communications Protocol (DCP) to the digital switch.
    The Z702AL1-DSU Data Mo dule Base provides the Data Communications 
    Equipment (DCE) interface connection for a 7407D voice terminal to d ata 
    terminals. The module provides full-duplex asynchronous operation only. The 
    module and 7407D voice terminal integrate data and voice into the DCP to the 
    digital switch.
    The MTDM provides an EIA RS-232D Data Terminal Equipment (DTE) interface 
    for connection to off-premises (out of building) private-line trunk facilities, or a 
    switched telecommunications network, and a DCP interface for connection to the 
    d i gital sw itch. The MTDM may also serve as part of a conversion resource for 
    modem pooling. The MTDM is also used to interface with DCE-type multiplexers. 
    						
    							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 support Automatic Calling Unit (ACU) type dialing. The MPDM can be 
    configured to support the Data Call Setup or Off-Premises Data-Only Extension 
    feature. The MPDM also supports data rates of 56 and 64 kbps for downloading 
    and other high-speed data transfer requirements.
    The 7400A Data Mo dule may b e used instead of an MTDM when supporting the 
    combined Modem Pooling feature. The 7400A Data Mo dule sup ports 
    asynchronous operation and provides a DCP interface to the switch and an EIA 
    RS-232C interface to the associated modem. The 7400A Data Mo dule also can 
    be used with a data terminal and supports keyboard  dialing in the same manner 
    as the MPDM.
    The 7500B Data Mo dule is a stand-alone unit that supports asynchronous or 
    synchronous DCE and asynchronous DTE on the ISDN Basic Rate Interface 
    (BRI) switch interface (G3, DEFINITY Generic 2 (G2) and the 5ESS switch). In 
    asynchronous mode, the 7500B supports p a cket or circuit-switched data 
    communications, and can be controlled via the front panel or the keyboard of a 
    connected terminal. In synchronous mode, the 7500B supports circuit-switched 
    or nailed-up data communications, requires either the Multipurpose 
    Enhancement Board or the High-Speed Synchronous Enhancement Board , and 
    only can be controlled via the front panel.
    When configured as an asynchronous DCE, the 7500B provides an EIA RS-232D 
    interface and sup ports full-duplex data transmission at rates of 300, 1200, 2400, 
    4800, 9600, and 19200 b ps. The following optional enhancements are available 
    for the 7500B in an asynchronous DCE configuration:  an RS-366 ACU interface 
    and a se cond asynchronous EIA RS-232D interface. With an additional 
    asynchronous EIA RS-232D interfa ce, the 7500B can simultaneously support 
    either two D-channel packet data calls or one D-channel p a cket call and one 
    B-channel circ uit call. However, the 7500B cannot simultaneously support two 
    B-channel circ uit-switched calls.
    When configured as an asynchronous DTE, the 7500B provides an EIA RS-232D 
    interface and supports full-duplex data transmission at rates of up to 19200 bps. 
    This configuration is most commonly used for modem pooling a p plications.
    In order to b e c onfigured as a synchronous DCE, the 7500B must have either the 
    Multipurpose Enhancement Board or the High-Speed Synchronous 
    Enhancement Board. With the Multipurpose Board, the 7500B provides an EIA 
    RS-232D interface and an RS-366 ACU interface, and supports full-duplex data 
    transmission at rates of 1200, 2400, 4800, 9600, 19200, 56000, and 64000 bps. 
    The 7500B also supports half-duplex emulation at rates of 1200, 2400, 4800, 
    9600, 19200, and 56000 bps. With the High-Speed Synchronous Enhancement 
    Board, the 7500B provides a V.35 interface and supports full-duplex data  
    						
    							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 
    through one terminal. The ISDN ADM supports the standard Hayes command set 
    for comp atibility with existing PC communications packages and provides AT&T 
    extensions to the standard Hayes command set to allow even g reater flexibility in 
    future a p plications. PC a p plications that use the  ISDN ADM Ap plications 
    Programming Interface (API) can simultaneously control, monitor, and process 
    both voice and data calls.
    The DLC, which provides eight ports to connect user’s asynchronous EIA 
    RS-232D interfa ce to DTE, can be used as an alternative to DTDM or PDM.
    Data mo dules su pp ort the following interfaces:
    nAll data modules (except the WDM, MPDM, and 3270) provide a modified 
    EIA RS-232D  interfa ce.
    nThe WDM provides a ITU-T interface for Wideband transmissions.
    nThe MPDM provides either EIA RS-232D V.35 or RS-449 interface. The 
    MPDM can also emulate an Automatic Call Unit (ACU) and supports the 
    RS-366 interface. The ACU emulation and RS-366 interface are required 
    for Keyboard Dialing and are discussed in the Data Call Setup feature 
    description. 
    nThe 3270 Data Module provides a Category A coaxial DCE interface for 
    connection to 3270-type data terminals or a cluster controller. It also 
    provides a DCP interface for connection to the digital switch.
    The 3270 Data Module is available in the following three models:
    n3270T (Terminal) — connects to a Category A 3270-type terminal, such as 
    the IBM. 3278 Information Delivery System. The 3270T Data Module must 
    connect through the switch to a 3270C (Controller) Data Module.
    n3270A (Asynchronous) — provides the same function as the 3270T Data 
    Module. It also allows the 3270-type terminal to emulate a Digital 
    Equipment Corporation VT100 or an AT&T asynchronous terminal.
    n3270C (Controller) — connects an IBM 3274 or 3276 cluster controller to 
    the switch. A 3270C Data Module can contain as many as eight ports.
    Trunks or channels of a DS1/E1 can also b e used as non-signaling data 
    endpoints with the A c cess End points function. An access endpoint is either a 
    non-signaling channel on a DS1/E1 interface or a non-signaling port on an 
    Analog Tie Trunk circ uit pack that is assigned a unique extension. Since an 
    access endpoint is non-signaling, it neither generates nor responds to signaling. 
    As a result, an access endpoint cannot be use d as a trunking facility (it cannot  
    						
    							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 PC with a 
    terminal emulator.
    The system supports digital-to-digital, digital-to-analog, analog-to-digital, and 
    analog-to-analog data calls. For data calls, the user can access the system 
    through these digital or analog data endpoints. Digital data en d points are data 
    modules and associated data equipment, PCs, and data channels [used for 
    remote G3-MT terminals, and CDR] . Analog data endpoints are modems (or 
    acoustic coupled modems) and associated data equipment connected to the 
    system through analog lines or trunks. Voice-band data calls using modems can 
    be connected to the system through digital trunks.
    The system supports DCP. This protocol provides framing, control, and  signaling 
    for each of two information channels. Only one channel is used for voice-only or 
    data-only a p plications. Both channels are used for simultaneous voice and data 
    transmission. Simultaneous voice and data information can b e transmitte d on 
    c alls to or from a 7403D or 7405D voice terminal with a DTDM, a 7404D with its 
    b uilt-in data module, any 7400-series with an optional data module base, and 
    any 8400 series voice terminal with listed 7400 d ata module. Calls to or from 
    other equipment are either voice-only or data-only.
    ISDN-BRI provides one 16 k b ps signaling channel (D-channel) and two 64 kbps 
    information channels (B-channels), with a total information rate of 144 kbps. The 
    primary purpose of the signaling channel is to convey Q.931 messa ge-oriented 
    signaling for the setup and tear down of calls carried by the B-Channels on the 
    BRI. Since all the signaling is done on the D-channel, both B-channels are 
    ‘‘clear.’’ As a result, the entire widths of the B-channels are used for 
    simultaneously carrying voice and circuit-switched data. Voice and data 
    information c an be simultaneously transmitte d on c alls to or from a 7505, 7506, or 
    7507 voice terminal equip ped with an optional ADM. Without the optional ADM, 
    the 7505, 7506, and 7507 voice terminals can handle voice-only calls.
    Data Networking
    Data networking connects two or more data endpoints. The system is a highly 
    reliable, centralized switch that provides switched access between en d points. 
    Typical data communications configurations for the system are shown in Figure 
    2-1.
    Switc h ed  access allows one terminal to connect to one of any number of 
    devices. Therefore, more effective use of data equipment is obtained than with 
    dedicated (hard-wired) links. Switched access also reduces the need for 
    duplicated (dedicated) equipment. Switched Ac cess systems can emulate 
    hardwired networks through use of the Ad ministered Connections feature. 
    						
    							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. System Data Communications Configuration
    Generally, data networks are either local area networks, extended networks, or 
    combinations of both. The two networks and their implementation within the 
    system are d efined as follows:
    HOST
    COMPUTER 513 BCT
    TERMINAL 7404D WITH
    BUTTON
    DATA MODULE
    DATA
    TERMINAL
    PROCESSOR
    DATA MODULE
    515 BCT
    TERMINALANALOGDCPDCP
    DCP DCP
    DLC³DCP
    DCPDCP*
    COAX A RS-232C
    RS-232C RS-232C
    RS-232CRS-232CRS-232C
    DEFINITY
    GENERIC 3
    PROCESSOR
    DATA MODULE
    3270-TYPE
    DATA MODULEDATA
    TERMINAL EIA PRINTER
    LEGEND
    *  DCP - DIGITAL COMMUNICATIONS PROTOCOL
    ²  ADU - ASYNCHRONOUS DATA UNIT ³  DLC - DATA LINE CIRCUIT
    ADU²
    DATA MODEM
    3270-TYPE
    DATA
    TERMINAL
    ANALOG
    VOICE
    TERMINALPROCESSOR
    DATA MODULE DATA
    TERMINALDATA
    TERMINAL
    DIGITAL VOICE
    TERMINAL WITH
    AN ATTACHED
    DIGITAL
    TERMINAL DATA
    MODULE 
    						
    							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 to the endpoints. Since the business office 
    equipment can access multiple data systems, the data equipment and 
    applications can be used more productively. The system also provides 
    several data-related features that are easy to use and contribute to 
    expedient use of the system and its networking capabilities.
    nExtended Networks 
    Extended networks mainly provide connections between the system and 
    other distant switches, including remote access facilities. With remote 
    access facilities, a local terminal can access remote host computers. Also, 
    remote terminals can access either local computer facilities or other 
    remote comp uter facilities. Extended networks are constructed of analog 
    or digital facilities and can be either p u blic or private. Typical networking 
    configurations are shown in Figure 2-2. Public networks available in the 
    US include the following:
    — Local Central Office (CO) switching extended through direct 
    distance dialing
    — Foreign exchange (FX) central office trunking
    — Wide Area Telecommunications Service (WATS)
    — MEGACOM Telecommunications Service
    — MEGACOM 800 Telecommunications Service
    — Software Defined Network (SDN)
    — Software Defined Data Network (SDDN) (G3i)
    — ACCUNET. Digital Service
    nPrivate networks include:
    — AT&T DATAPHONE. Data Communications Service
    — Distributed Communications System (DCS)
    — Electronic Tandem Network (ETN)
    — Enhanced Private Switched Communications Service (EPSCS )
    — Private line (PL)
    — Software Defined Network (SDN)
    — Software Defined Data Network (SDDN)
    — Tandem tie trunk 
    						
    							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  ETN
    DS1
    LOCAL AREADATA TERMINALS
    PERSONAL COMPUTERS
    PRINTERS
    FACSIMILE EQUIPMENT
    OTHERS
    COMPUTERHOST
    PRIVATE LINES APPLICATIONS
    PROCESSOR
    CENTRAL
    OFFICE
    DATA
    TERMINAL
    HOST
    COMPUTER
    REMOTE ACCESS FACILITIES
    SYSTEM A
    SYSTEM CSYSTEM B
    WATS
    FX TRUNKS
    CO TRUNKS
    DIGITAL - PUBLIC
    NETWORK FACILITIES
    DS1/CO
    DS1/FX
    DS1/WATS
    ISDN-PRI 
    						
    							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)
    nTeletypewriter (TTY) Modes
    nDigital Communications Protocol (DCP)
    nBX.25 Packet Switching
    nITU-T V.35
    nWideband Switching
    nBinary Synchronous Communications (Bisync )
    ISDN Protocols
    The ISDN Q.931 Proto c ol is used to support Layer 3 call control signaling for both 
    the network and user sides of an ISDN Primary Rate Interface (PRI). Both DS1 
    and E1 digital transmission standards are supported on a per-interface basis. 
    This implementation provides call state transition, proper message content, and 
    error recovery, as well as protocol support for other related features. For all 
    switches (except G3vs/G3s ABP), the ISDN Q.932 Protocol is used to support the 
    CallVisor Adjunct Switch Ap plications Interface (ASAI) required for the Inbound 
    Call Management feature.
    Electronic Industries Association (EIA)
    EIA RS-232D
    This protocol is widely used for short distance and low-sp eed applications such 
    as data terminals and modems connecting data terminals. The data link  consists 
    of a 25-conductor cable. The conductors are used for data-link control and 
    timing, as well as for transmitting and receiving signals. Data-link control is 
    accomplished by handshake signaling between the transmit and receive 
    devices. Data speeds are limited to 19.2 kb ps or fewer. 
    						
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