Administrator's Guide

I
Issue 5 October 2002 1977555-233-506
International Telecommunications Union (ITU)
Formerly known as International Telegraph and Telephone Consultative Committee (CCITT), ITU is an inter-
national organization that sets universal standards for data communications, including ISDN. ITU members
are from telecommunications companies and organizations around the world. See alsoBX.25.
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. ACD measurements that are made external to the system
(via External CMS) are referred to as external measurements.
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
IP
Internet Protocol
ISDN
See Integrated Services Digital Network (ISDN).
ISDN-BRI
Integrated Services Digital Network-Basic Rate Interface
ISDN Gateway (IG)
A feature allowing integration of the switch and a host-based telemarketing application via a link to a gateway
adjunct. The gateway adjunct is a 3B-based product that notifies the host-based telemarketing application of
call events.
ISDN-PRI
Integrated Services Digital Network-Primary Rate Interface
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 cur-
rently available from other vendors and are primarily designed for video conferencing applications. Accord-
ingly, currently available terminal adapters adapt the two pairs of video codec data (V.35) and dialing
(RS-366) ports to an ISDN PRI facility.
IS/DTT
Integrated Services/digital tie trunk