MERLIN LEGEND Communications System Release 6.0
System Manager’s Guide
555-660-118
Issue 1
February 1998
Glossary
Page GL-13
G
forced idle
Condition of the system during certain programming or
maintenance procedures; system prevents initiation of new
calls.
foreign exchange
See
FX.
Fractional-T1
A digital transmission facility consisting of at least one, and
fewer than 24
DS0 channels using robbed-bit signaling and
connecting a
PBX and a central office or toll office.
frame
One of several segments of an analog or digital signal that
has a repetitive characteristic. For example, a
DS1 frame
consists of a framing
bit and 24 bytes, which equals 193
bits.
framing format
Pattern of
frames used in transmissions.
frequency
generator
See
ring generator.
FRL
(Facility Restriction Level)
Calling 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.
