Lucent Technologies 8.2 User Manual

Page of 1707
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 gateway 
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
ISN
Information Systems Network
ISO
International Standards Organization
ISV
Independent software vendor
ITP
Installation test procedure
ITU
International Telecommunications Union
IXC
Interexchange carrier code
K
kHz
Kilohertz
kbps
Kilobits per second