3Com 3C8S5007 - SuperStack II PathBuilder S500 Switch User Manual page 171

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CONNECTOR 4B
TIME SINCE FLUSH/REBOOT(days:hours:mins:secs):
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CUMULATIVE STATISTICS SINCE LAST FLUSHED OR REBOOTED+
ES 00010
OOF 00001
CRC 00019K
FERR 00134
BPV 00005
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LAST 24 HOURS STATISTICS IN 15 MINUTE SAMPLES
00:15
ES 00000 00000
OOF 00000 00000
CRC 00900 00900
FERR 00900 00900
BPV 00000 00000
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last 24 hour period) and are collected for each Ultra-WAN CSU/DSU
interface. The display shows the cumulative number of events since the
last FLUSH command or ReBoot command was issued and also the 96
15-minute intervals, in the last 24 hour period.
A partial sample display is shown here:
00:30 00:45 01:00
00000 00000 00000
00000 00000 00000
00900 00900 00900
00900 00900 00900
00000 00000 00000
The statistics definitions are as follows:
ES - Errored Second = A second in which a OOF (Out of Frame) or CRC
(Cyclic Redundancy Check error) occured and a UAS (UnAvailable
Second) has not occured.
OOF - Out Of Frame = A count of the number of times synchronization to
the receive T1 or E1 frame was lost.
CRC - Cyclic Redundancy Check error = A count of CRC-Errored T1 or E1
frames in the receive stream, based on CRC checksum calculations.
FERR - Frame bit ERRor = A count of frame bit errors occuring in the
receive T1 or E1 framing patterns.
BPV - BiPolar Violation = A count of illegal bipolar violations reported in
the line code of receive T1 or E1 signal.
00:02:34:12
01:15 01:30 01:45
00000 00000 00000
00000 00000 00000
00900 00900 00900
00900 00900 00900
00000 00000 00000
02:00 02:15
00000
00000
00900
00900
00000
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