AT&T MERLIN LEGEND Installation & Maintenance Manual page 697

Glossary
G
General Purpose Adapter
(GPA)
A device that connects an
analog multiline telephone to
optional equipment such as
an answering machine or a
fax machine.
glare
The loud dual-tone multi-
frequency (DTMF) signal an
incoming caller hears when
another caller tries to call out
on a line/trunk at the same
time the call is coming in on
that line/trunk.
ground-start (GS) Iine/trunk
A line/trunk on which, after
verifying that the line/trunk is
idle (no ground on tip), the
communications system
transmits a request for
service (puts ground on ring)
to a distant central office
(CO).
H
headset
An ultralight earpiece and
microphone for hands-free
telephone operation.
GL-12 Glossary
Home screen
"home base" of the
display screen on
digital/lSDN telephones,
which shows time, date, and
call information, and when a
feature is in use.
house cable
Cable that runs from the
equipment room to a small,
walk-in closet (called a
satellite closet) elsewhere in
the building.
Hybrid/PBX
A mode of operation in which
the communications system
uses trunk pools and
Automatic Route Selection
(ARS) in addition to personal
lines—that is, direct facility
terminations (DFTs) on line
buttons. The Hybrid/PBX
mode also provides a single
interface to users for both
internal and external calling.
I
immediate-start tie trunk
A tie trunk on which no start
signal is necessary and
dialing can begin
immediately after the tie trunk
is seized.
in-band signaling
See robbed-bit signaling.