User`s guide

XSR User’s Guide 61
Chapter 4 Troubleshooting T1/E1 Links
Configuring T1/E1 Interfaces
NOTE
Statistics displayed with the show controllers command are reset
every 24 hours. That is, once the port or line is created with the
controller command, the 24-hour timer starts.
Slip Seconds Counter Increasing
If slip seconds are present on the T1/E1 line, usually there is a clocking
problem. Complete the following steps to correct this problem:
1 Ensure the clock source is derived from the network (source clocking
extracted from the line).
2 Set the T1/E1 clock source from Controller mode if needed.
Framing Loss Seconds Increasing
If framing loss seconds are present on the T1/E1 line, usually there is a
framing problem. Perform the following steps to correct this problem:
1 Ensure the framing format configured on the controller port matches
the framing format of the line.
2 Set the T1/E1 framing mode from Controller mode if needed.
3 (T1 Only) Change the line build out (LBO) using the cablelength
long or cablelength short command if needed.
Line Code Violations Increasing
If line code violations are present on the T1/E1 line, usually there is a line
encoding problem. Perform the following steps to correct this problem:
1 Ensure the line coding format configured on the controller port
matches the framing format of the line.
2 Set the T1/E1 linecode mode from Controller mode if needed.
3 (T1 Only) Change the line build out (LBO) using the cablelength
long and cablelength short command if needed.