Service Manual

361
6802800U74-AN
Chapter 13: MTS Troubleshooting
Non octet aligned : 0
E1 Statistics:-
Second timer ex-
pired
: 11 Remote Alarm :0
Line Loss : 0 Framer Rx Data Over-
flow :0
Frame alignment
Loss
: Failed Framer Tx Data Under-
run :0
AIS : On Negative Rx clock
slip :0
CRC4 Error : Off Positive Rx clock
slip :0
Errored Seconds : 0 Negative Tx clock
slip :0
Bipolar Violation : 0 Positive Tx clock
slip :0
E1 Configura-
tion:-
crc4:on
crdStart:1
crd:1 ts16Skip:on Port:1 Clock:External
For E1, the E1 statistics provide a running count of errors encountered or detected on the E1 interface.
These include a count of the potential link loss errors as indicated by the front panel LEDs. For
convenience, the current E1 timeslot configuration is also shown.
Line Loss
An increasing value of this statistic indicates existence of low-level E1 electric connection issues
between the site and network equipment.
AIS
An increasing value of this statistic indicates that the network equipment directly connected to the
site is not getting correct transmission from the far-end network equipment and it notifies the site
about that fact.
Remote Alarm
An increasing value of this statistic indicates that the network equipment directly connected to the
site is not getting correct E1 transmissions from the Site Controller and notifies the Site Controller of
the error.
Frame alignment Loss
An increasing value of this statistic indicates that the E1 signal received by the site from the
connected network equipment lost frame alignment. Each incremental increase of the statistic
indicates that three or more frames have been received without alignment.
NOTICE: The growing value of the Second timer expired statistic is no reason for
concern. The Second timer expired value is incremented every second no matter if the
Site Link is up or down. The Second timer expired count does not indicate any Site Link
failure.
The HDLC statistics provide a running counter of HDLC frames transmitted and received on the site
link interface as shown by the "Good frames" counters. Incrementing counters with the absence of