Nortel Secure Router 3120 Installation Manual page 68

68 TROUBLESHOOTING
The following loopback commands are available:
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BERT Test
This command is used to initiate a bit error rate test. The following BERT
tests commands are available to test specific T1 or E1 links or a T3.
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The pattern parameter may have any of the following values:
BERT Test Patterns for T1
Pattern
interval
BERT Test Patterns for E1
Pattern
0s
1s
2^15
2^20
2^23
Copyright © 2005-2007, Nortel Networks
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Router> test t1 1
Router/test/t1 1/loopback line
Router/test/t1 1/loopback payload
Router/test/t1 1/loopback remote line
Router/test/t1 1/loopback remote payload
Router/test/t1 1/loopback
Router/test/e1 1/bert
Router/test/t1 1/bert
Router/test/t3 1/bert
Description
2^11 (2^11 -1) pattern
2^15 (2^15 -1) pattern
2^20
(2^20 -1) pattern
QRSS QRSS pattern (default)
Duration for BERT test
The range is 1-1092 minutes; the default is continuous.
Description
All-zeros pattern.
All-ones pattern.
Pseudorandom pattern with no more than 14 consecutive
zeros and no more than 15 consecutive ones.
Use this pattern for testing at data rates above 19.2 kbps
(G.703-standard test).
A pattern of no more than 19 consecutive zeros and no
more than 20 consecutive ones.
Pseudorandom signal with no more than 22 consecutive
zeros and no more than 23 consecutive ones.
Secure Router 3120
Installation Guide
NN47260-300 02.01 Standard
9.2 10 January 2007
Nortel Networks Confidential