Specifications

Reference Guide C-9
FRAD
Frame Relay Assembler/Disassembler, a card used in this system.
FRS
Frame Relay Server, a card used in this system.
FS
Frame Signaling bits (T1 line).
FT
Frame Terminal bits (T1 line)
FUNI
Frame User Network Interface
FX
Foreign Exchange, a line that goes from a CO or PBX beyond the PBX or the CO’s normal
service area.
FXO
Foreign Exchange - Office, performs analog to digital and digital to analog transmission at the
CO.
FXO Card
One of the voice cards for this system
FXS
Foreign Exchange - Subscriber or Station, an interface at the end of an FX line connected to a
telephone or PBX. Performs digital to analog and analog to digital transmission at the station
end.
FXS Card
One of the voice cards for this system
Ground
A physical connection to the earth, chassis, or other reference point