Lucent Technologies DEFINITY Enterprise Communication Server Release 8.2 Administrators Guide

DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Glossary and abbreviations 
1637  
IAS
Inter-PBX Attendant Service
ICC
Intercabinet cable or intercarrier cable
ICD
Inbound Call Director
ICDOS
International Customer-Dialed Operator Service
ICHT
Incoming call-handling table
ICI
Incoming call identifier
ICM
Inbound Call Management
IDDD
International Direct Distance Dialing
IDF
Intermediate distribution frame
IE
Information element
immediate-start tie trunk
A trunk on which,...

DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Glossary and abbreviations 
1638  
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...

DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Glossary and abbreviations 
1639  
in-use lamp
A red light on a multiappearance voice terminal 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
IO
Information outlet
ISDN
See Integrated Services Digital Network (ISDN).
ISDN Gateway (IG)
A feature allowing integration of the switch and a...

DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Glossary and abbreviations 
1640  
kbyte
Kilobyte
kg
Kilogram
L
LAN
Local area network
LAP-D
Link Access Procedure on the D-channel
LAPD
Link Access Procedure data
LATA
Local access and transport area
lb
Pound
LBO
Line buildout
LDN
Listed directory number
LDS
Long-distance service
LEC
Local exchange carrier
LED
See light-emitting diode (LED).
light-emitting diode (LED)
A semiconductor device that produces light when voltage...

DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Glossary and abbreviations 
1641  
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 tele-
phone or data terminal.
link
A transmitter-receiver channel that connects two systems.
link-access procedure on the D-channel...

DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Glossary and abbreviations 
1642  
main-satellite-tributary
A private network configuration that can either stand alone or access an ETN. A main switch provides inter-
connection, via tie trunks, with one or more subtending switches, called satellites; all attendant positions for 
the main/satellite configuration; and access to and from the public network. To a user outside the complex, a 
main/satellite configuration appears...

DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Glossary and abbreviations 
1643  
MDR
Message detail record
MEM
Memory
memory
A device into which information can be copied and held, and from which information can later be obtained.
memory shadowing link
An operating-system condition that provides a method for memory-resident programs to be more quickly 
accessed, allowing a system to reboot faster.
message center
An answering service that supplies agents to and stores...

DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Glossary and abbreviations 
1644  
MMS
Material Management Services
MO
Maintenance object
modem
A device that converts digital data signals to analog signals for transmission over telephone circuits. The ana-
log signals are converted back to the original digital data signals by another modem at the other end of the cir-
cuit.
modem pooling
A capability that provides shared conversion resources (modems and data modules) for...

DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Glossary and abbreviations 
1645  
MSS
Mass storage system
MSSNET
Mass storage/network control
MT
Management terminal
MTDM
Modular trunk data module
MTP
Maintenance tape processor
MTT
Multitasking terminal
multiappearance voice terminal
A terminal 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...

DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Glossary and abbreviations 
1646  
NANP
North American Numbering Plan
narrowband
A circuit-switched call at a data rate up to and including 64 kbps. All nonwideband switch calls are consid-
ered narrowband.
native terminal support
A predefined terminal type exists in switch software, eliminating the need to alias the terminal (that is, manu-
ally map call appearances and feature buttons onto some other natively supported...