System information

IPmux-8/16 User’s Manual Chapter 6 Performance Management
Viewing E1/T1, E3/T3 Port Statistics 6-9
Table 6-4. Current Data Parameters – E1/T1
Parameter Remarks
Slot 3, 4
Port Port number of the interface
CH1..CH8
Type E1, T1
Current Data Each parameter displays the number of seconds of that particular type of error
encountered by the E1/T1 interface during the current 15-minute interval
Time Elapsed
(sec)
Amount of time that has passed since the beginning of the current 15-minute interval
0..899
LOS Loss of Signal failure
Sync. LED turns off during LOS
For T1:
Upon observing 192 contiguous pulse positions with no pulse of either positive or
negative polarity. (Signal is more than 30dB below nominal amplitude).
For E1:
Upon observing 255 contiguous pulse positions with no pulse of either positive or
negative polarity.
LOF
(RED alarm)
Loss of Frame, Local alarm
Sync. LED turns off during LOF
Declared when an OOF defect persists for 2.5 seconds and no AIS detect is present
OOF defect is the occurrence of a framing bits error
RAI Remote Alarm indication (also called - YELLOW ALARM)
An RAI pattern is received from the far end (user) when the far end framer enters a RED
condition (Loss Of Frame). In this condition, the sync. LED turns off
AIS Alarm Indication Signal - received from user
Sync. LED blinks during AIS
For T1:
Detected when an unframed "all 1" signal is received for 3 msec
For E1:
Detected when a string of 512 bits contains fewer than three zero bits
LOMF Loss of Framing sequence in Time Slot 16
Valid in E1 MF mode only
FEBE Number of FEBE (Far End Back Failure) seconds
BES Bursty Errored Seconds
(Errored second type B)
A count of seconds with 2 up to 319 CRC error events, without AIS or SEF (framing bits
errors) detection
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