Instruction manual

MERLIN LEGEND Communications System Release 5.0
System Planning
555-650-112
Issue 1
June 1997
Glossary
Page GL--9
H
I
GPA (General Purpose Adapter) Device that connects an analog
multiline telephone to optional equipment such as an
answering machine or a fax machine.
ground-start trunk Trunk on which the communications system, after verifying
that the trunk is idle (no ground on tip lead), transmits a
request for service (puts ground on ring lead) to the
telephone company central office (
CO ).
group
videoconferencing
system
A system application that allows face-to-face,
simultaneous video and voice communications between
groups and requires high-speed data transmission facilities.
See also
desktop videoconferencing system.
Hands Free
Answer on
Intercom
See HFAI .
hands-free unit See HFU .
headset Lightweight earpiece and microphone used for hands-free
telephone operation.
HFAI (Hands Free Answer on Intercom) Feature that allows a
user to answer a voice-announced call.
HFU (Hands-Free Unit) Unit for analog multiline telephones that
allows users to make and receive calls on the
speakerphone without using the handset.
Home screen Display normally shown on an MLX display telephone;
shows time, date, and call information, and shows when
some features are in use.
host Telephone company or other switch providing features and
services to the system users, usually when the system is
operating in
Behind Switch mode .
Hybrid/PBX mode One of three modes of system operation, in which the
system uses line/trunk
pool s and ARS in addition to
personal lines . Provides a single interface (SA buttons) to
users for both internal and external calling. See also
Behind
Switch mode
and Key mode .
ICOM buttons (intercom buttons) Telephone buttons that provide access
to inside system lines for calling other extensions or
receiving calls from them.
Inspect screen Display screen on an MLX display telephone that allows the
user to preview incoming calls and see a list of the features
programmed on line buttons.