Cisco 10000 Series Troubleshooting Guide

6-4
Cisco 10000 Series Router Troubleshooting Guide
OL-0439-02
Chapter 6 Troubleshooting Serial Lines
Using Bit Error Rate Tests
Sending a BER Test Pattern on a T1 Line
You can send a BER test pattern on a T1 line with the controller command. The unframed option causes
the BER test pattern to use the entire T1 bandwidth including the T1 framing as well as payload bits. If
“unframed” is omitted then the T1 will be either SF or ESF framed as configured by the T1 framing
command and the BER test pattern will occupy only the T1 payload bits.
t1 t1-line-number bert pattern pattern interval time [unframed]
where:
• t1-line-number is 1–28.
• time is 1–14400 minutes.
• pattern is:
– 0s, repetitive test pattern of all zeros (as 00000...).
– 1s, repetitive test pattern of all ones (as 11111...).
– 2^11, pseudorandom test pattern (2,048 bits long).
– 2^15, pseudorandom O.151 test pattern (32,768 bits long).
– 2^20-O153, pseudorandom O.153 test pattern (1,048,575 bits long).
– 2^20-QRSS, pseudorandom QRSS O.151 test pattern (1,048,575 bits long).
– 2^23, pseudorandom O.151 test pattern (8,388,607 bits long).
– alt-0-1, repetitive alternating test pattern of zeros (0s) and ones (1s), as 01010101.
Examples:
• Send a BER test pseudorandom pattern of 2^20 through T1 line 10 for 5 minutes.
The example that follows is for a T1, numbered 10, on a CT3 line card in slot 1:
Router(config)# controller T3 1/0/0
Router(config-controller)# t1 10 bert pattern 2^20 interval 5 unframed
• Send a repetitive pattern of all ones through T1 line 10 for 14400 minutes (240 hours).
The example that follows is for a T1, numbered 10, on a CT3 line card in slot 1:
Router(config)# controller T3 1/0/0
Router(config-controller)# t1 10 bert pattern 1s interval 14400 unframed
Note You can terminate a BER test during the specified test period with the no t1 bert command.

Cisco 10000 Series Specifications

General

Brand	Cisco
Model	10000 Series
Category	Network Router
Language	English