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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.

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