AT&T MERLIN LEGEND Release 3.1 System Manager's Manual page 399

Glossary
IROB protector
IS II/III
ISDN
ISDN terminal
adapter
J
jack
K
kbps
Key mode
GL–12
System Manager's Guide
(In-Range Out-of-Building protector) Surge-protection
device for off-premises telephones at a location within
1000 feet (305 m) of cable distance from the control unit.
(Integrated Solution II or Integrated Solution III) Set of
UNIX System-based applications that augments and
provides additional services using the system.
(Integrated Services Digital Network) Public or private
network that provides end-to-end digital connectivity for all
services to which users have access by a limited set of
standard multipurpose user and network interfaces ;
provides digital circuit-switched or packet-switched
connections within the network and to other networks for
national and international digital connectivity.
(Integrated Services Digital Network terminal adapter) A
device that connects the communications system with
data terminal equipment (DTE) ; for example, a data
module or modem acting as data communications
equipment (DCE) for a PC.
Physical connection point to the system for a telephone,
trunk, or other device. Also called "port."
(kilobits per second)
One of three modes of system operation, in which the
system uses personal lines on line buttons for outside
calls, with a separate interface ( ICOM buttons ) for internal
calling. See also Behind Switch mode and Hybrid/PBX
mode.