AT&T MERLIN LEGEND Release 3.0 System Programming And Maintenance Manual page 107

Glossary
G
General-Purpose
Adapter.
glare
GPA
ground-start trunk
Group IV (G4) fax
machine
H
Hands Free Answer on
Intercom
hands-free unit
headset
See GPA.
Condition that occurs when a user tries to call
out on a loop-start trunk at the same time that
another call arrives on the same trunk.
(General-Purpose Adapter) Device that
connects an analog multiline telephone to
optional equipment such as an answering
machine or a fax machine.
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 off ice (CO).
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 Ill (G3)
fax machine or another Group IV (G4) fax
machine.
See HFAI.
See HFU.
Lightweight earpiece and microphone used for
hands-free telephone operation.
System Programming and Maintenance (SPM) GL-17