2-12
Cisco ME-3600X-24CX Series Switch Chassis Configuration Guide
OL-27620-01
Chapter 2 Configuring T1/E1 Interfaces
Troubleshooting E1 and T1 Controllers
•
Use a loopback somewhere in the link or network
•
Configure remote testing equipment to transmit the same BER test pattern at the same time
To run a BERT on an E1 or T1 controller, perform the following optional tasks beginning in global
configuration mode:
The following keywords list different BERT keywords and their descriptions.
Caution
2^11, 2^15, 2^20-O153, and 2^20-QRSS patterns are supported.
Both the total number of error bits received and the total number of bits received are available for
analysis. You can select the testing period from 1 minute to 24 hours, and you can also retrieve the error
statistics anytime during the BER test.
Note
To terminate a BER test during the specified test period, use the no bert command.
You can view the results of a BER test at the following times:
•
After you terminate the test using the no bert command
•
After the test runs completely
•
Anytime during the test (in real time)
Task
Command
Select the E1 or T1 controller and enter
controller configuration mode.
controller {e1 | t1} 0/number
•
number—Specifies the location of the
controller. The number range for T1 and E1 is 1
to 16.
Specify the BERT pattern for the E1 or T1
line and the duration of the test in minutes
(1 to 1440 minutes).
Note
2^11, 2^15, 2^20-O153, and
2^20-QRSS patterns are supported.
bert pattern {2^11 | 2^15 | 2^20-O153 |
2^20-QRSS} interval minutes
Exit configuration mode when you have
finished configuring the controller.
End
View the BERT results.
show controllers {e1 | t1} 0/number
Table 2-2
BERT Pattern Descriptions
Keyword
Description
2^11
Pseudo-random test pattern that is 2,048 bits in length.
2^15
Pseudo-random O.151 test pattern that is 32,768 bits in length.
2^20-O153
Pseudo-random O.153 test pattern that is 1,048,575 bits in
length.
2^20-QRSS
Pseudo-random QRSS O.151 test pattern that is 1,048,575 bits
in length.