Zhone Technologies IMACS-200 - Manual (Page 284)

-10 Glossary
Model No. Running Head
Far End Block Error, shows transmission errors detected by the far end equipment
FOTS
Fiber Optics Transmission Systems
frame
A delineated assembly of information, consisting of one sequence of 24 encoded channel
samples (T1) or 32 channel samples (E1).
FS
Frame Signaling bits (T1 line).
FT
Frame Terminal bits (T1 line)
FT1
Fractional T1
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.
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 port
One of the voice ports for this system
Ground