Telenetics Corporation FT100 S, Инструкция по установке и эксплуатации

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Control Port Operation
FT 100S 6-21
SF Error Count (SF framing only) contains a count of SF error events.
An SF error event is either a bipolar violation (BPV) or an out of frame
error.
Error Second (ES) is any second in which an ESF (or SF) error event
occurred.
Bursty Errored Second (BES)
ESF framing is an errored second with more than one but less than
320 ESF error events with no OOF detected.
SF framing is an errored second with more that one but less than
320 SF error events with no OOF detected.
Severely Errored Second (SES)
ESF framing is an errored second either with an OOF detected or
with 320 or more ESF errored events.
SF framing is an errored second either with an OOF detected or
with 320 or more SF errored events.
Unavailable Second (UAS) is a count of seconds in which service is
unavailable. An unavailable state is declared at the onset of 10 consecu-
tive SES and is cleared at the onset of 10 consecutive seconds with no
SES. Also, an unavailable state is declared during power off times of
less than 24 hours. If the CSU power is off for more than 24 hours, all
error history is reset.
Controlled Slip Second (CSS) any second with a replication or deletion
of a DS1 frame. This data is not detected by the FT 100S, but can be
retrieved from the AT&T 54016 compatible equipment.
Loss of Frame Count (LOFC) is the number of times a loss of frame is
declared. Loss of frame is declared after 2.5 seconds of continuous loss
of signal or OOF. Loss of frame is cleared after 2.5 seconds of no loss of
signal or OOF.