Glossary and Abbreviations
ICD
Inbound Call Director
ICDOS
International
ICHT
Incoming
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, 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
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,
INS
ISDN Network Service
inside call
A call placed from one telephone to another within the local communications system.
