MERLIN LEGEND Communications System Release 6.1
System Programming Guide
555-661-111
Issue 1
August 1998
Glossary
Page GL-14
H
glare Condition that occurs when a user tries to call out on a
loop-start
line
at the same time that another call arrives on
the same line.
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 IV (G4) fax
machine
A fax unit, offering 400 by 100 dots per inch (DPI) in fine
mode, that can operate at any speed for communication
with a Group III (G3) fax machine or another Group IV (G4)
fax machine.
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
.
hub system In
private network
that is arranged in a
star configuration
,
the communications system through which all calls across
the network pass.
Hybrid/PBX mode One of three modes of system operation, in which the
system uses line/trunk
pools
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
.
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