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Lucent Technologies DEFINITY Enterprise Communication Server Release 8.2 Administrators Guide
Lucent Technologies DEFINITY Enterprise Communication Server Release 8.2 Administrators Guide
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DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Glossary and abbreviations 1627 data service unit (DSU) A device that transmits digital data on transmission facilities. data terminal An input/output (I/O) device that has either switched or direct access to a host computer or to a processor interface. data terminal equipment (DTE) Equipment consisting of the endpoints in a connection over a data circuit. In a connection between a data ter- minal and host, the terminal, the host, and their associated modems or data modules make up the DTE. dB Decibel dBA Decibels in reference to amperes. dBrnC Decibels above reference noise with C filter. DC Direct current DCE Data-communications equipment D-channel backup Type of backup used with Non-Facility Associated Signaling (NFAS). A primary D-channel provides signal- ing for an NFAS D-channel group (two or more PRI facilities). A second D-channel, on a separate PRI facility of the NFAS D-channel group, is designated as backup for the D-channel. Failure of the primary D-channel causes automatic transfer of call-control signaling to the backup D-channel. The backup becomes the primary D-channel. When the failed channel returns to service, it becomes the backup D-channel. DCO Digital central office DCP Digital Communications Protocol DCS Distributed Communications System DDC Direct Department Calling DDD Direct Distance Dialing delay-dial trunk A trunk that allows dialing directly into a communications system (digits are received as they are dialed). denying a request Sending a negative acknowledgment (NAK), done by sending an FIE with a return error component (and a cause value). It should not be confused with the denial event report that applies to calls. designated voice terminal The specific voice terminal to which calls, originally directed to a certain extension, are redirected. Com- monly used to mean the forwarded-to terminal when Call Forwarding All Calls is active.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Glossary and abbreviations 1628 dial-repeating trunks A PBX tie trunk that is capable of handling PBX station-signaling information without attendant assistance. dial-repeating tie trunk A tie trunk that transmits called-party addressing information between two communications systems. DID Direct Inward Dialing digit conversion A process used to convert specific dialed numbers into other dialed numbers. digital The representation of information by discrete steps. See also analog . digital communications protocol (DCP) A proprietary protocol used to transmit both digitized voice and digitized data over the same communications link. A DCP link is made up of two 64-kbps information (I-) channels and one 8-kbps signaling (S-) channel. The DCP protocol supports two information-bearing channels, and thus two telephones/data modules. The I1 channel is the DCP channel assigned on the first page of the 8411 station form. The I2 channel is the DCP channel assigned on the analog adjunct page of the 8411 station form or on the data module page. Digital Communications Protocol. The DCP protocol supports two information-bearing channels, and thus two telephones/data modules. The I1 channel is the DCP channel assigned on the first page of the 8411 station form. The I2 channel is the DCP channel assigned on the analog adjunct page of the 8411 station form or on the data module page. digital data endpoints In DEFINITY ECS, devices such as the 510D terminal or the 515-type business communications terminal (BCT). digital multiplexed interface (DMI) An interface that provides connectivity between a communications system and a host computer or between two communications systems using DS1 24th-channel signaling. DMI provides 23 64-kbps data channels and 1 common-signaling channel over a twisted-pair connection. DMI is offered through two capabilities: bit-ori- ented signaling (DMI-BOS) and message-oriented signaling (DMI-MOS). digital signal level 0 (DS0) A single 64-kbps voice channel. A DS0 is a single 64-kbps channel in a T1 or E1 facility and consists of eight bits in a T1 or E1 frame every 125 microseconds. digital signal level 1 (DS1) A single 1.544-Mbps (United States) or 2.048-Mbps (outside the United States) digital signal carried on a T1 transmission facility. A DS1 converter complex consists of a pair, one at each end, of DS1 converter circuit packs and the associated T1/E1 facilities. digital terminal data module (DTDM) An integrated or adjunct data module that shares with a digital telephone the same physical port for connec- tion to a communications system. The function of a DTDM is similar to that of a PDM and MPDM in that it converts RS-232C signals to DCP signals. digital-to-analog converter (DAC) A device that converts data in digital form to the corresponding analog signals. See also analog-to-digital con- verter (ADC). digital transmission A mode of transmission in which information to be transmitted is first converted to digital form and then transmitted as a serial stream of pulses.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Glossary and abbreviations 1629 digital trunk A circuit that carries digital voice and/or digital data in a telecommunications channel. DIOD Direct Inward and Outward Dialing direct agent A feature, accessed only via ASAI, that allows a call to be placed in a split queue but routed only to a specific agent in that split. The call receives normal ACD call treatment (for example, announcements) and is mea- sured as an ACD call while ensuring that a particular agent answers. Direct Extension Selection (DXS) A feature on an attendant console that allows an attendant direct access to voice terminals by pressing a group-select button and a DXS button. Direct Inward Dialing (DID) A feature that allows an incoming call from the public network (not FX or WATS) to reach a specific tele- phone without attendant assistance. Direct Inward Dialing (DID) trunk An incoming trunk used for dialing directly from the public network into a communications system without help from the attendant. disk drive An electromechanical device that stores data on and retrieves data from one or more disks. distributed communications system (DCS) A network configuration linking two or more communications systems in such a way that selected features appear to operate as if the network were one system. DIVA Data In/Voice Answer DLC Data line circuit DLDM Data-line data module DMI Digital-multiplexed interface DND Do not disturb DNIS Dialed-Number Identification Service DOD Direct Outward Dialing domain VDNs, ACD splits, and stations. The VDN domain is used for active-notification associations. The ACD-split domain is for active-notification associations and domain-control associations. The station domain is used for the domain-control associations. domain-control association A Third Party Domain Control Request capability initiates a unique CRV/link number combination, which is referred to as a domain-control association.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Glossary and abbreviations 1630 domain-controlled split A split for which Third Party Domain Control request has been accepted. A domain-controlled split provides an event report for logout. domain-controlled station A station for which a Third_Party_Domain_Control request has been accepted. A domain-controlled station provides event reports for calls that are alerting, connected, or held at the station. domain-controlled station on a call A station that is active on a call, and which provides event reports over one or two domain-control associa- tions. DOSS Delivery Operations Support System DOT Duplication Option Terminal DPM Dial Plan Manager DPR Dual-port RAM DS1 Digital Signal Level 1 DS1C Digital Signal Level-1 protocol C DS1 CONV Digital Signal Level-1 converter DSI Digital signal interface DSU Data service unit DTDM Digital-terminal data module DTE Data-terminal equipment DTGS Direct Trunk Group Select DTMF Dual-tone multifrequency DTS Disk-tape system duplicated common control Two processors ensuring continuous operation of a communications system. While one processor is online, the other functions as a backup. The backup processor goes online periodically or when a problem occurs.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Glossary and abbreviations 1631 duplication The use of redundant components to improve availability. When a duplicated subsystem fails, its backup redundant system automatically takes over. duplication option A system option that duplicates the following: control carrier containing the SPE, EI circuit packs in carriers, fiber-optic cabling between port networks, and center-stage switch in a CSS-connected system. DWBS DEFINITY Wireless Business System DXS Direct extension selection E E1 A digital transmission standard that carries traffic at 2.048 Mbps. The E1 facility is divided into 32 channels (DS0s) of 64 kbps information. Channel 0 is reserved for framing and synchronization information. A D-channel occupies channel 16. E & M Ear and mouth (receive and transmit) EA Expansion archangel EAL Expansion archangel link ear and mouth (E & M) signaling Trunk supervisory signaling, used between two communications systems, whereby signaling information is transferred through 2-state voltage conditions (on the E and M leads) for analog applications and through a single bit for digital applications. EAS See Expert Agent Selection. ECC Error Correct Code ECMA European Computer Manufacturers Association EEBCDIC Extended Binary-Coded Decimal Interexchange Code EFP Electronic power feed EI Expansion interface EIA Electronic Industries Association
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Glossary and abbreviations 1632 EIA-232 A physical interface specified by the EIA. EIA-232 transmits and receives asynchronous data at speeds of up to 19.2 kbps over cable distances of up to 50 feet. EIA-232 replaces RS-232 protocol in some DEFINITY applications. electronic tandem network (ETN) A tandem tie-trunk network that has automatic call-routing capabilities based on the number dialed and the most preferred route available. Each switch in the network is assigned a unique private network office code (RNX), and each voice terminal is assigned a unique extension. Electronics Industries Association (EIA) A trade association of the electronics industry that establishes electrical and functional standards. emergency transfer If a major system failure occurs, automatic transfer is initiated to a group of telephones capable of making outgoing calls. The system operates in this mode until the failure is repaired and the system automatically returns to normal operation. Also called power-failure transfer. EMI Electromagnetic interference end-to-end signaling The transmission of touch-tone signals generated by dialing from a voice terminal to remote computer equip- ment. These digits are sent over the trunk as DTMF digits whether the trunk signaling type is marked as tone or rotary and whether the originating station is tone or rotary. Example: a call to a voice-mail machine or auto- mated-attendant service. A connection is first established over an outgoing trunk. Then additional digits are dialed to transmit information to be processed by the computer equipment. enhanced private-switched communications service (EPSCS) An analog private telecommunications network based on the No. 5 crossbar and 1A ESS that provides advanced voice and data telecommunications services to companies with many locations. EPN Expansion-port network EPROM Erasable programmable read-only memory EPSCS Enhanced Private Switched Communications Services ERL Echo return loss Erlang A unit of traffic intensity, or load, used to express the amount of traffic needed to keep one facility busy for one hour. One Erlang is equal to 36 CCS. See also capability . ESF Extended superframe format ESPA European Standard Paging Access ETA Extended Trunk Access; also Enhanced Terminal Administration ETN Electronic tandem network
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Glossary and abbreviations 1633 ETSI European Telecommunications Standards Institute expansion archangel (EAA) A network-control microprocessor located on an expansion interface (EI) port circuit pack in an expansion port network. The EA provides an interface between the EPN and its controlling switch-processing element. expansion-archangel link (EAL) A link-access function on the D-channel (LAPD) logical link that exists between a switch-processing element and an expansion archangel (EA). The EAL carries control messages from the SPE to the EA and to port cir- cuit packs in an expansion port network. expansion control cabinet See expansion control carrier . expansion control carrier A carrier in a multicarrier cabinet that contains extra port circuit packs and a maintenance interface. Also called expansion control cabinet in a single-carrier cabinet. expansion interface (EI) A port circuit pack in a port network that provides the interface between a PN’s TDM bus/ packet bus and a fiber-optic link. The EI carries circuit-switched data, packet-switched data, network control, timing control, and DS1 control. In addition, an EI in an expansion port network communicates with the master maintenance circuit pack to provide the EPN’s environmental and alarm status to the switch-processing element. expansion port network (EPN) A port network (PN) that is connected to the TDM bus and packet bus of a processor port network (PPN). Control is achieved by indirect connection of the EPN to the PPN via a port-network link (PNL). See also port network (PN). Expert Agent Selection A feature allowing incoming calls to be routed to specialized groups of agents within a larger pool of agents. extension-in Extension-In (ExtIn) is the work state agents go into when they answer (receive) a non-ACD call. If the agent is in Manual-In or Auto-In and receives an extension-in call, it is recorded by CMS as an AUX-In call. extension-out The work state that agents go into when they place (originate) a non-ACD call. external measurements Those ACD measurements that are made by the External CMS adjunct. extension A 1- to 5-digit number by which calls are routed through a communications system or, with a Uniform Dial Plan (UDP) or main-satellite dialing plan, through a private network. external call A connection between a communications system user and a party on the public network or on another com- munications system in a private network. F FA C Feature Access Code
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Glossary and abbreviations 1634 facility A telecommunications transmission pathway and associated equipment. facility-associated signaling (FAS) Signaling for which a D-channel carries signaling only for those channels on the same physical interface. FA S Facility-associated signaling FAT Facility access trunk FA X Facsimile FCC Federal Communications Commission FEAC Forced Entry of Account Codes feature A specifically defined function or service provided by the system. feature button A labeled button on a telephone or attendant console used to access a specific feature. FEP Front-end processor fiber optics A technology using materials that transmit ultrawideband electromagnetic light-frequency ranges for high-capacity carrier systems. FIC Facility interface codes fixed A trunk allocation term. In the fixed allocation scheme, the time slots necessary to support a wideband call are contiguous, and the first time slot is constrained to certain starting points. flexible A trunk allocation term. In the flexible allocation scheme, the time slots of a wideband call can occupy non- contiguous positions within a single T1 or E1 facility. floating A trunk allocation term. In the floating allocation scheme, the time slots of a wideband call are contiguous, but the position of the first time slot is not fixed. FNPA Foreign Numbering-Plan Area foreign-exchange (FX) A CO other than the one providing local access to the public telephone network. foreign-exchange trunk A telecommunications channel that directly connects the system to a CO other than its local CO. foreign numbering-plan area code (FNPAC) An area code other than the local area code, that must be dialed to call outside the local geographical area.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Glossary and abbreviations 1635 FRL Facilities Restriction Level FX Foreign exchange G G3-MA Generic 3 Management Applications G3-MT Generic 3 Management Terminal G3r Generic 3, RISC (Reduced Instruction Set Computer) generalized route selection (GRS) An enhancement to Automatic Alternate Routing/Automatic Route Selection (AAR/ARS) that performs rout- ing based on call attributes, such as Bearer Capability Classes (BCCs), in addition to the address and facilities restriction level (FRL), thus facilitating a Uniform Dial Plan (UDP) that is independent of the type of call being placed. glare The simultaneous seizure of a 2-way trunk by two communications systems, resulting in a standoff. GM Group manager GPTR General-purpose tone receiver grade of service The number of call attempts that fail to receive service immediately. Grade of service is also expressed as the quantity of all calls that are blocked or delayed. ground-start trunk A trunk on which, for outgoing calls, the system transmits a request for services to a distant switching system by grounding the trunk ring lead. To receive the digits of the called number, that system grounds the trunk tip lead. When the system detects this ground, the digits are sent. GRS Generalized Route Selection H H0 An ISDN information transfer rate for 384-kbps data defined by CCITT and ANSI standards. H11 An ISDN information transfer rate for 1536-kbps data defined by CCITT and ANSI standards.
DEFINITY ECS Release 8.2 Administrator’s Guide 555-233-506 Issue 1 April 2000 Glossary and abbreviations 1636 H12 An ISDN information transfer rate for 1920-kbps data defined by CCITT and ANSI standards. handshaking logic A format used to initiate a data connection between two data module devices. hertz (Hz) A unit of frequency equal to one cycle per second. high-reliability system A system having the following: two control carriers, duplicate expansion interface (EI) circuit packs in the PPN (in G3r with CSS), and duplicate switch node clock circuit packs in the switch node (SN) carriers. See also duplicated common control , duplication, duplication option, and critical-reliability system. HNPA See home numbering-plan area code (HNPA). holding time The total length of time in minutes and seconds that a facility is used during a call. home numbering-plan area code (HNPA) The local area code. The area code does not have to be dialed to call numbers within the local geographical area. hop Nondirect communication between two switch communications interfaces (SCI) where the SCI message passes automatically without intermediate processing through one or more intermediate SCIs. host computer A computer, connected to a network, that processes data from data-entry devices. hunt group A group of extensions that are assigned the Station Hunting feature so that a call to a busy extension reroutes to an idle extension in the group. See also ACD work mode . Hz See hertz (Hz). I I1 The first information channel of DCP. I2 The second information channel of DCP. I2 Interface A proprietary interface used for the DEFINITY Wireless Business System for the radio-controller circuit packs. Each interface provides communication between the radio-controller circuit pack and up to two wire- less fixed bases. I3 Interface A proprietary interface used for the DEFINITY Wireless Business System for the cell antenna units. Each wireless fixed base can communicate to up to four cell antenna units.