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MERLIN LEGEND Communications System Release 6.0
System Programming
555-660-111
Issue 1
February 1998
Glossary
Page GL-13
F
facility Equipment (often a
line
/
trunk
) constituting a
telecommunications path between the system and the
telephone company central office (
CO
).
Facility Restriction
Level
See
FRL
.
factory setting Default state of a device or feature when an optional setting
is not programmed by the user or system manager.
fax (facsimile) Scanning and transmission of a graphic image
over a telecommunications facility, or the resulting
reproduced image, or the machine that does the scanning
and transmitting.
Fax Attendant
System
Fax handling and processing application available with
AUDIX Voice Power
.
FCC (Federal Communications Commission)
feature Function or service provided by the system.
feature code Code entered on a dialpad to activate a feature.
feature module Prior to Release 3.0, a circuit pack inserted into the
processor
module
, used to provide system features and
replaced when the system is upgraded.
Feature screen Display screen on MLX display telephones; provides quick
access to commonly used features.
ferrite core Attachment to the AC power cord and ground wire of the
carrier power supply for compliance with FCC, part 15
requirements.
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.