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ATT DEFINITY Communications System Generic 3 Instructions Manual
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.