Enterasys Networks Security Router X-PeditionTM - Manual (Page 100)

Troubleshooting T1/E1 & T3/E3 Links
4-12 Configuring T1/E1 & T3/E3 Interfaces
Figure 4-6 T1/E1 & T3/E3 Error Events Analysis Troubleshooting Flowchart
Slip Seconds Counter Increasing
If slip seconds are present on the T1/E1 or T3/E3 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 or T3/E3 clock source from Controller mode if needed.
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.
If your controller still
does not function as desired,
contact your service/network
Error Events Analysis
No
No
No
Yes
Is the slip seconds
counter increasing?
Is the framing loss
seconds counter
increasing?
Is the line code violations
counter increasing?
Is the clock source
derived from the
network/line?
Is the framing type
correct?
Is theT1/E1 line coding
correct?
Use these commands
to set framing:
controller t1 x
framing
If T1, then change LBO:
cablelength {long | short}
Use the following
T1/E1 commands to set
line coding:
controller t1 x
linecode {ami | b8zs}
If T1, then change LBO:
cablelength {long | short}
Use the command
below to verify the
error counter is still:
controller x
No
No
No Yes
Yes
Use the following
commands to set
source clocking:
controller t1 x
clock source line
increasing:
Use the command
below to verify the
error counter is still:
controller x
increasing:
Use the command
below to verify the
error counter is still:
controller x
increasing:
provider
If T3, then change LBO:
cablelength