Lucent Technologies DEFINITY Business Communications System And GuestWorks Instructions Manual

							DEFINITY® Business Communications System and GuestWorks® Issue 6 
Overview  555-231-208  Issue 1
April 2000
Glossary and Abbreviations 
GL-13  
DND
Do not disturb
DNIS
Dialed-Number Identification Service
DOD
Direct Outward Dialing
DOSS
Delivery Operations Support System
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
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) 
						

							DEFINITY® Business Communications System and GuestWorks® Issue 6 
Overview  555-231-208  Issue 1
April 2000
Glossary and Abbreviations 
GL-14  
ear and mouth (E & M) signaling
Trunk supervisory signaling, used between two communications systems, whereby signaling 
information is transferred through two-state voltage conditions (on the E and M leads) for analog 
applications and through a single bit for digital applications.
EBCDIC
Extended Binary-Coded Decimal Interexchange Code
ECMA
European Computer Manufacturers Association
EIA
Electronic Industries Association
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 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 telephone 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 telephone to remote computer 
equipment. 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 system or automated-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.
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 CCS or hundred call seconds
.
ESF
Extended superframe format 
						

							DEFINITY® Business Communications System and GuestWorks® Issue 6 
Overview  555-231-208  Issue 1
April 2000
Glossary and Abbreviations 
GL-15  
ESPA
European Standard Paging Access
ETA
1. Extended Trunk Access
2. Enhanced Terminal Administration
ETN
Electronic tandem network
ETSI
European Telecommunications Standards Institute
extension-in
Extension-In (ExtIn) is the work state agents go into when they answer (receive) a non-ACD call.
extension-out
The work state that agents go into when they place (originate) a non-ACD call.
extension
A 1- to 5-digit number by which calls are routed through a communications system or, with a 
Uniform Dial Plan (UDP), through a private network.
external call
A connection between a communications system user and a party on the public network or on 
another communications system in a private network.
F
FA C
Feature Access Code
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
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.
fiber optics
A technology using materials that transmit ultrawideband electromagnetic light-frequency ranges 
for high-capacity carrier systems. 
						

							DEFINITY® Business Communications System and GuestWorks® Issue 6 
Overview  555-231-208  Issue 1
April 2000
Glossary and Abbreviations 
GL-16  
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.
FRL
Facilities Restriction Level
FX
Foreign exchange
G
generalized route selection (GRS)
An enhancement to Automatic Alternate Routing/Automatic Route Selection (AAR/ARS) that 
performs routing 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.
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.
H12
An ISDN information transfer rate for 1920 kbps data defined by CCITT and ANSI standards. 
						

							DEFINITY® Business Communications System and GuestWorks® Issue 6 
Overview  555-231-208  Issue 1
April 2000
Glossary and Abbreviations 
GL-17  
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.
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.
hunt group
A group of extensions that are assigned so that a call to a busy extension reroutes to an idle 
extension in the group. See also ACD split.
hunt group condition
A condition whereby a caller is temporarily separated from a connection with an attendant. A hunt 
group condition automatically occurs when the attendant, active on a call, presses the start button.
hunt group number
The hunt group’s identity to the switch and BCMS.
hunt group report
A report that provides historical traffic information for internally-measured hunt groups.
I
I1
The first information channel of DCP.
I2
The second information channel of DCP.
ICC
Intercabinet cable or intercarrier cable
ICDOS
International Customer-Dialed Operator Service
ICI
Incoming call identifier
ICM
Inbound Call Management
IDDD
International Direct Distance Dialing 
						

							DEFINITY® Business Communications System and GuestWorks® Issue 6 
Overview  555-231-208  Issue 1
April 2000
Glossary and Abbreviations 
GL-18  
IDF
Intermediate distribution frame
immediate-start tie trunk
A trunk on which, after making a connection with a distant switching system for an outgoing call, the 
system waits a nominal 65 ms before sending the digits of the called number. This allows time for 
the distant system to prepare to receive digits. On an incoming call, the system has less than 65 ms 
to prepare to receive the digits.
INADS
Initialization and Administration System
incoming gateway
A PBX that routes an incoming call on a trunk 
not administered for Supplementary Services 
Protocol B to a trunk 
not administered for Supplementary Services Protocol B.
information exchange
The exchange of data between users of two different systems, such as the switch and a host 
computer, over a LAN.
INS
ISDN Network Service
inside call
A call placed from one telephone to another within the local communications system. 
Integrated Services Digital Network (ISDN)
A public or private network that provides end-to-end digital communications for all services to which 
users have access by a limited set of standard multipurpose user-network interfaces defined by the 
CCITT. Through internationally accepted standard interfaces, ISDN provides digital circuit-switched 
or packet-switched communications within the network and links to other ISDNs to provide national 
and international digital communications. See also Integrated Services Digital Network Basic Rate 
Interface (ISDN-BRI) and Integrated Services Digital Network Primary Rate Interface (ISDN-PRI).
Integrated Services Digital Network Basic Rate Interface (ISDN-BRI)
The interface between a communications system and terminal that includes two 64 kbps 
B-channels for transmitting voice or data and one 16 kbps D-channel for transmitting associated 
B-channel call control and out-of-band signaling information. ISDN-BRI also includes 48 kbps for 
transmitting framing and D-channel contention information, for a total interface speed of 192 kbps. 
ISDN-BRI serves ISDN telephones and digital terminals fitted with ISDN terminal adapters. See 
also Integrated Services Digital Network (ISDN)
 andIntegrated Services Digital Network Primary 
Rate Interface (ISDN-PRI).
Integrated Services Digital Network Primary Rate Interface (ISDN-PRI)
The interface between multiple communications systems that in North America includes 24 64 kbps 
channels, corresponding to the North American digital signal level-1 (DS1) standard rate of 1.544 
Mbps. The most common arrangement of channels in ISDN-PRI is 23 64 kbps B-channels for 
transmitting voice and data and one 64 kbps D-channel for transmitting associated B-channel call 
control and out-of-band signaling information. With nonfacility-associated signaling (NFAS), 
ISDN-PRI can include 24 B-channels and no D-channel. See alsoIntegrated Services Digital 
Network (ISDN) andIntegrated Services Digital Network Basic Rate Interface (ISDN-BRI).
intercept tone
An alternating high and low tone that indicates a dialing error or denial of the service requested.
internal call
A connection between two users within a system. 
						

							DEFINITY® Business Communications System and GuestWorks® Issue 6 
Overview  555-231-208  Issue 1
April 2000
Glossary and Abbreviations 
GL-19  
International Telecommunications Union (ITU)
Formerly known as International Telegraph and Telephone Consultative Committee (CCITT), ITU is 
an international organization that sets universal standards for data communications, including 
ISDN. ITU members are from telecommunications companies and organizations around the world.
International Telegraph and Telephone Consultative Committee
See International Telecommunications Union (ITU)
.
interflow
The ability for calls to forward to other splits on the same PBX or a different PBX using the Call 
Forward All Calls feature.
intraflow
The ability for calls to redirect to other splits on the same PBX on a conditional or unconditional 
basis using call coverage busy, don’t answer, or all criteria.
internal measurements
BCMS measurements that are made by the system.
in-use lamp
A red light on a multi-appearance telephone that lights to show which call appearance will be 
selected when the handset is lifted or which call appearance is active when a user is off-hook.
INWATS
Inward Wide Area Telephone Service
ISDN
See Integrated Services Digital Network (ISDN)
.
ISDN trunk
A trunk administered for use with ISDN-PRI. Also called ISDN facility.
ISDN-PRI terminal adapter
An interface between endpoint applications and an ISDN PRI facility. ISDN-PRI terminal adapters 
are currently available from other vendors and are primarily designed for video conferencing 
applications. Accordingly, currently available terminal adapters adapt the two pairs of video codec 
data (V.35) and dialing (RS-366) ports to an ISDN PRI facility.
ISO
International Standards Organization
ITU
International Telecommunications Union
IXC
Interexchange carrier code
L
LAN
Local area network
LAP-D
Link Access Procedure on the D-channel
LAPD
Link Access Procedure data 
						

							DEFINITY® Business Communications System and GuestWorks® Issue 6 
Overview  555-231-208  Issue 1
April 2000
Glossary and Abbreviations 
GL-20  
LATA
Local access and transport area
LDN
Listed directory number
LEC
Local exchange carrier
LED
See light-emitting diode (LED)
.
light-emitting diode (LED)
A semiconductor device that produces light when voltage is applied. LEDs provide a visual 
indication of the operational status of hardware components, the results of maintenance tests, the 
alarm status of circuit packs, and the activation of telephone features.
lightwave transceiver
Hardware that provides an interface to fiber-optic cable from port circuit packs and DS1 converter 
circuit packs. Lightwave transceivers convert electrical signals to light signals and vice versa.
line
A transmission path between a communications system or CO switching system and a telephone or 
other terminal.
line appearance
See appearance
.
line buildout
A selectable output attenuation is generally required of DTE equipment because T1 circuits require 
the last span to lose 15–22.5 dB.
line port
Hardware that provides the access point to a communications system for each circuit associated 
with a telephone or data terminal.
link
A transmitter-receiver channel that connects two systems.
link-access procedure on the D-channel (LAPD)
A link-layer protocol on the ISDN-BRI and ISDN-PRI data-link layer (level 2). LAPD provides data 
transfer between two devices, and error and flow control on multiple logical links. LAPD is used for 
signaling and low-speed packet data (X.25 and mode 3) on the signaling (D-) channel and for 
mode-3 data communications on a bearer (B-) channel.
local area network (LAN)
A networking arrangement designed for a limited geographical area. Generally, a LAN is limited in 
range to a maximum of 6.2 miles and provides high-speed carrier service with low error rates. 
Common configurations include daisy chain, star (including circuit-switched), ring, and bus.
logical link
The communications path between a processor and a BRI terminal.
loop-start trunk
A trunk on which, after establishing a connection with a distant switching system for an outgoing 
call, the system waits for a signal on the loop formed by the trunk leads before sending the digits of 
the called number.
LSU
Local storage unit 
						

							DEFINITY® Business Communications System and GuestWorks® Issue 6 
Overview  555-231-208  Issue 1
April 2000
Glossary and Abbreviations 
GL-21  
LW C
Leave Word Calling
M
MADU
Modular asynchronous data unit
main distribution frame (MDF)
A device that mounts to the wall inside the system equipment room. The MDF provides a 
connection point from outside telephone lines to the PBX switch and to the inside telephone 
stations.
maintenance
Activities involved in keeping a telecommunications system in proper working condition: the 
detection and isolation of software and hardware faults, and automatic and manual recovery from 
these faults.
management terminal
The terminal that is used by the system administrator to administer the switch. The terminal may 
also be used to access the BCMS feature.
major alarm
An indication of a failure that has caused critical degradation of service and requires immediate 
attention. Major alarms are automatically displayed on LEDs on the attendant console and 
maintenance or alarming circuit pack, logged to the alarm log, and reported to a remote 
maintenance facility, if applicable.
Manual-In work mode
One of four work modes: the mode in which an agent is ready to process another call manually. 
See 
Auto-In Work mode
 for a contrast.
MAPD
Multiapplication platform for DEFINITY
MCC
Multicarrier cabinet
MCT
Malicious Call Trace
MCU
Multipoint conferencing unit
MDF
Main distribution frame
MDM
Modular data module
MDR
Message detail record
MET
Multibutton electronic telephone 
						

							DEFINITY® Business Communications System and GuestWorks® Issue 6 
Overview  555-231-208  Issue 1
April 2000
Glossary and Abbreviations 
GL-22  
MF
Multifrequency
MFB
Multifunction board
MFC
Multifrequency code
minor alarm
An indication of a failure that could affect customer service. Minor alarms are automatically 
displayed on LEDs on the attendant console and maintenance or alarming circuit pack, sent to the 
alarm log, and reported to a remote maintenance facility, if applicable.
MIS
Management information system
modular processor data module (MPDM)
A processor data module (PDM) that can be configured to provide several kinds of interfaces 
(RS-232C, RS-449, and V.35) to customer-provided data terminal equipment (DTE). See also 
processor data module (PDM)
.
modular trunk data module (MTDM)
A trunk data module that can be configured to provide several kinds of interfaces (RS-232, RS-449, 
and V.35) to customer-provided data terminal equipment.
MOS
Message-oriented signaling
MPDM
Modular processor data module
MS
Message server
MSA
Message servicing adjunct
MSG
Message service
MT
Management terminal
MTDM
Modular trunk data module
MTP
Maintenance tape processor
MTT
Multitasking terminal
multiappearance telephone
A telephone equipped with several call-appearance buttons for the same extension, allowing the 
user to handle more than one call on that same extension at the same time.
Multicarrier cabinet
A structure that holds one to five carriers. See also single-carrier cabinet
.