Cisco Cisco IOS Software Release 12.0(21)S

     Total errors     :5 

     Time this sync   :00:02:30

     Errors this sync :5

     Sync count       :1

To monitor a BER test on a channelized line card, use the following EXEC commands:

This section provides an example of how to send the BERT pseudo-random pattern of 2^20 through a 
T1 line 10 for five minutes.

Router(config)# controller T3 6/0

Router(config-controller)# t1 10 bert pattern 2^20 interval 5

The following sections provide references related to bit error rate testing.

Router# show controllers t3 slot/port:

-line-number

Displays complete or partial results of the BER test on a T1 
line. 

Router# show controllers sonet slot/port:

sts1-number

Displays results of the BER test on a DS-3/E3 interface with 
SONET framing. 

Router# show controllers sonet slot/port:

au3-number

Displays results of the BER test on a DS-3/E3 interface with 
SDH framing with AU-3 mapping. 

Router# show controllers sonet 

slot/port:

au4-number:vc3-number

Displays results of the BER test on a DS-3/E3 interface with 
SDH framing with AU-4 mapping.