System information

IPmux-8/16 User’s Manual Chapter 6 Performance Management
Viewing E1/T1, E3/T3 Port Statistics 6-11
Table 6-5. Current Data Parameters – E3/T3 (Cont.)
Parameter Possible Values / Remarks
LOS Loss of Signal failure
Sync. LED turns off during LOS
For T3:
Upon observing 192 contiguous pulse positions with no pulse of either positive or
negative polarity. (Signal is more than 30dB below nominal amplitude).
For E3:
Upon observing 255 contiguous pulse positions with no pulse of either positive or
negative polarity.
AIS Alarm Indication Signal - received from user
Sync. LED blinks during AIS
For T3:
Detected when an unframed "all 1" signal is received for 3 msec.
For E3:
Detected when a string of 512 bits contains fewer than three zero bits.
ES Errored Seconds
A second containing one or mode of the following events:
• CRC error event, SEF (OOF) event, or AIS
• OOF defect is the occurrence of framing bits error
If SES is also effective at the same time, ES will run for 10 seconds and stop
SES Severely Errored Seconds
320 or more CRC error events, one or more SEF (OOF), or AIS. OOF defect is the
occurrence of framing bits error
UAS Unavailable Seconds
Number of seconds that the interface is unavailable. The system is unavailable after
10 continuous SES.