Glossary and Abbreviations
I
1804
Administrator’s Guide for Avaya Communication Manager
November 2003
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.
IMT
Intermachine trunk
in
Inch
INADS
Initialization and Administration System
ICLID
Incoming Caller ID
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.
Information Systems Network (ISN)
A WAN and LAN with an open architecture combining host computers, minicomputers, word
processors, storage devices, PCs, high-speed printers, and nonintelligent terminals into a single
packet-switching system.
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 terminals and digital terminals fitted with ISDN terminal adapters. See also
Integrated
Services Digital Network (ISDN)
and
Integrated Services Digital Network Primary Rate Interface
(ISDN-PRI)
.