Instruction manual

GLOSSARY
I
Immediate-Start Tie Trunk
After establishing a connection with the distant switching system for an outgoing call, the
system waits a nominal 65 milliseconds before sending the digits of the called number.
This allows time for the distant system to prepare to receive the digits. Similarly, on an
incoming call, the system has less than 65 milliseconds to prepare to receive the digits.
Information Exchange
The exchange of data between users of two
host computer) over a local area network
Initialization and Administration System (INADS)
different systems (DEFINITY Generic 1 and
An AT&T Network Operations Division (NOD) services alarm reception and trouble track-
ing system.
Integrated Services Digital Network—Primary Rate Interface (ISDN-PRI)
ISDN-PRI is an internationally accepted standard interface that provides end-to-end digi-
tal connectivity. It uses a high-speed interface which provides service-independent
access to switches services. It uses a T1 interface and supports 23 64-kbps voice or
data B-Channels and one 64-kbps signaling D-channel (on the 24th channel when using
FAS) or 24 B-Channels on one DS1 facility and a D-Channel on a separate DS1 facility
(when using Non-facility Associated Signaling) for a total bandwidth of 144 MB.
Intercept Tone
An alternating
requested.
Interface
high and low tone; indicates a dialing error or denial of the service
A common boundary between two systems or pieces of equipment.
Interflow
Interflow allows calls directed or redirected to one split to be redirected to an external
destination.
Internal Call
A connection between two users within the system.
G-15