DEFINITY ECS Release 8.2
Administrator’s Guide
555-233-506 Issue 1
April 2000
Glossary and abbreviations
1639
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
ISDN
See Integrated Services Digital Network (ISDN).
ISDN Gateway (IG)
A feature allowing integration of the switch and a host-based telemarketing application via a link to a gatewa y
adjunct. The gateway adjunct is a 3B-based product that notifies the host-based telemarketing application of
call events.
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
ISNInformation Systems Network
ISOInternational Standards Organization
ISVIndependent software vendor
ITPInstallation test procedure
ITUInternational Telecommunications Union
IXCInterexchange carrier code
KkHzKilohertz
kbps
Kilobits per second