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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. 
    						
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    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. 
    						
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    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. 
    						
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    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. 
    						
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    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 
    						
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    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 
    						
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    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
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    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. 
    						
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    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. 
    						
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    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. 
    						
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