Information Technology Reference
In-Depth Information
Show controller e1 Conditions
The E1 controller can be in three states:
Administratively down
•
Down
•
Up
•
Is the Controller Administratively Down?
The controller is administratively down when it has been manually shut down. You should restart the
controller to correct this error.
Step 1
Enter enable mode.
maui-nas-03>
en
Password:
maui-nas-03#
Step 2
Enter global configuration mode.
maui-nas-03#
configure terminal
Enter configuration commands, one per line. End with CNTL/Z
.
maui-nas-03(config)#
Step 3
Enter controller configuration mode.
maui-nas-03(config)#
controller e1 0
maui-nas-03(config-controlle)#
Step 4
Restart the controller.
maui-nas-03(config-controlle)#
shutdown
maui-nas-03(config-controlle)#
no shutdown
Is the Line Up?
If the E1 line is not up, check to see that the line configuration is correct and matches the settings of the
remote end.
Check the framing of the line and the remote end. For E1 lines, the framing is either CRC4 or noCRC4.
Check the linecoding of the line and the remote end. The linecoding is either AMI or HDB3.
Check whether the line termination is set for balanced or unbalanced (75 ohm or 120 ohm).
Consult your service provider for more information regarding the correct settings. Make any changes as
necessary to both local or remote end devices.
If the E1 controller and line are not up, check to see whether you are seeing one of the following
messages in the
show controller e1
exec output:
Receiver has loss of frame.
or
Receiver has loss of signal.
