Instruction manual

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