Verilink Access Manager 2000 (896-502037-001) Product Manual - Manual (Page 342)

A-10 Access Manager 2000 Manual
F
Failed Second See Unavailable Seconds (UAS).
Failed Signal State A failed signal state is declared whenever 10 SESs occur consecutively.
(The FSS will not clear until 10 consecutive seconds of data are
processed with no SESs present). New standards refer to a failed signal
state as an Unavailable Signal State (UASS).
Far-En This refers to a circuit element located at the remote end of a T1 circuit,
which may be accessed through the ESF Data Link to control and
retrieve performance data.
FCC Federal Communications Commission: a board of commissioners
appointed by the President under the Commissions Act of 1934, with
the authority to regulate all interstate telecommunications originating
in the United States.
FDL See ESF Facilities Data Link.
FE See Frame Bit Error.
FEC See Forward Error Correction.
Forward Error
Correction A technique used by a receiver for correcting errors incurred in
transmission over a communications channel without requiring the
retransmission of the information by the transmitter.
Frame Bit Error An error in the received framing bit pattern.
Frame Bit Errored
Second The number of whole seconds that a framing bit error has occurred.
Front-end Processor A special purpose computer dedicated to the handling of
communication links for a host computer.
FS Failed Second. See Unavailable Seconds (UAS).
FSS See Failed Signal State.
Full Duplex A communication link where both pieces of equipment can transmit in
both directions at the same time.
Term Definition