Filter
Top Products
MERLIN LEGEND Communications System Release 6.1
Network Reference
555-661-150
Issue 1
August 1998
Glossary
Page GL-13
G
Flash ROM Beginning with Release 3.0, a type of read-only memory
provided on the
processor
module
, used to supply system
features.
foil shield Copper foil sheet (for power units) used to prevent
excessive noise on the module.
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)
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.