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NOTE: The CT3/T3-F0 line module supports only the 2^11, 2^15, and 2^20-O153
options.
NOTE: The BERT patterns supported when testing the T1 layer vary depending on
the line module and I/O module assembly you are using.
t1 loopback
NOTE: The CT3/T3-F0 line module does not support the remote line inband option.
Specify one of the following test patterns:
0s Repetitive test pattern of all zeros, 00000...
1s Repetitive test pattern of all ones, 11111...
2^11 Pseudorandom test pattern, 2047 bits in length
2^15 Pseudorandom test pattern, 32,767 bits in length
2^20-O153 Pseudorandom test pattern, 1,048,575 bits in length
2^20-QRSS Pseudorandom QRSS test pattern, 1,048,575 bits in length
2^23 Pseudorandom test pattern, 8,388,607 bits in length
alt-0-1 Repetitive alternating test pattern of zeros and ones, 01010101...
Specify the duration of the test in the range 1–1440 minutes.
Optionally, specify the unframed keyword to overwrite the framing bits.
Example
host1(config-controll)#t1 2 bert pattern 2^11 interval 10 unframed
Use the no version to stop the test that is running.
See t1 bert.
Use to configure a loopback.
Specify one of the following options:
local Loops the router output data back toward the router at the T1 framer;
on supported line modules, also sends an alarm indication signal (AIS) out
toward the network
network { line | payload } Specify the line keyword to loop the data back
toward the network before the T1 framer and automatically set a local
loopback at the HDLC controllers. Specify the payload keyword to loop the
Chapter 1: Configuring Channelized T3 Interfaces
Testing Interfaces
27
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