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MERLIN LEGEND Communications System Release 6.1
Network Reference
555-661-150
Issue 1
August 1998
Glossary
Page GL-14
H
I
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
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
.
ICLID (Incoming Call Line Identification) See
Caller ID
.
ICOM buttons (intercom buttons) Telephone buttons that provide access
to inside system lines for calling other extensions or
receiving calls from them.
immediate-start
tie trunk
Tie trunk
on which no start signal is necessary; dialing can
begin immediately after the trunk is seized.
in-band signaling See
robbed-bit signaling
.
inside dial tone A tone users hear when they are off-hook on an
SA
or
ICOM
button
.