Cisco 10000 Series Configuration Manual page 204

Creating a T3, VT, or AUG Controller
Where:
•
•
The default idle character is 0x7e.
Use the no form of the command to return the idle character to its default.
In the following example, the idle character is set to flags:
Router(config)# interface serial 1/0/0.1
Router(config-if)# idle-character flags
Some systems interpret marks, 0xff, as an abort signal. Therefore, flags, 0x7e, is preferred.
Note
Running a T3 BER Test under SONET or SDH Framing
You can configure an unchannelized T3 interface to run a bit error rate (BER) test. The test is used to
check cables and solve signal problems in the field. To send a BER test pattern on an unchannelized T3
interface, use the following interface configuration command:
bert [errors number | pattern pattern] interval time
[no] bert
Where:
•
•
•
You can terminate a BER test at any time using the no bert command.
For more information, refer to the online
Examples:
•
•
Cisco 10000 Series Router Line Card Configuaration Guide
7-20
flags sets an idle character of 0x7e
marks sets an idle character of all 0xff
errors number is 1 to 255
pattern pattern is
0s—repetitive test pattern of all zeros (00000... )
–
1s—repetitive test pattern of all ones (11111... )
–
2^15—pseudorandom O.151 test pattern (32,768 bits in length)
–
2^20-O153—pseudorandom O.153 test pattern (1,048,575 bits in length)
–
QRSS-2^20—pseudorandom QRSS O.151 test pattern (1,048,575 bits in length)
–
2^23—pseudorandom O.151 test pattern (8,388,607 bits in length)
–
interval time is 1 to 1440 minutes
Send a BER test pseudorandom pattern of 2^20 through T3 line 1 for 5 minutes.
Router(config)# interface serial 1/0/0.1
Router(config-if)# bert pattern 2^20 interval 5
Send a repetitive pattern of all 1s through T3 line 1 for 1440 minutes.
Router(config)# interface serial 1/0/0.1
Router(config-if)# bert pattern 1s interval 1440
Chapter 7 4-Port Channelized OC-3/STM-1 Line Card Configuration
Cisco 10000 Series Internet Router Troubleshooting Guide.
OL-8834-04