User`s guide

XSR User’s Guide 55
Chapter 4 Troubleshooting T1/E1 Links
Configuring T1/E1 Interfaces
As shown in Figure 4, three troubleshooting actions are defined:
 T1/E1 Physical Layer (Layer 1) troubleshooting (loss of
signal/frame)
 T1/E1 Alarm Analysis
 T1/E1 Error Events Analysis
T1/E1 Physical Layer Troubleshooting
This section describes the techniques and procedures to troubleshoot T1/E1
Physical Layer problems. The troubleshooting flowchart below displays the
procedures described in the following section.
Figure 5 T1/E1 Physical Layer (Layer 1) Troubleshooting Flowchart
The
show controller command displays current controller parameters,
status and statistics data. Most T1/E1 errors are caused by incorrectly
configured lines including line coding, framing, and clock source parameters.
If your T1/E1 controller still
does not function as desired,
contact your service/network provider
Are the cables
Use the following commands to
bring up the T1/E1 controller:
controller t1 x
framing {SF | ESF}
Loss of Signal/Loss of Frame
No
and connectors
ok?
Loss of Signal
Loss of Frame
Connect or
replace the
cable
No
Yes
Is the
framing format
correct?
Use the following commands to
change the LBO:
cablelength long
cablelength short
Yes