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MERLIN LEGEND Communications System Release 6.0
System Programming
555-660-111
Issue 1
February 1998
Glossary
Page GL-14
G
H
frequency
generator
See
ring generator
.
FRL (Facility Restriction Level)
C
alling restriction type that
restricts calls to certain specified
ARS
and
UDP
routes.
FX (Foreign exchange) Central office (
CO
) other than the one
that is providing local access to the public telephone
network.
General Purpose
Adapter
See
GPA
.
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.