Table of Contents
Configuring a Channelized T3 Link
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Configuring a BER Test on a T1 Line
Bit error rate test (BERT) circuitry is built into the PA-MC-2T3+. With BER tests, you can test cables
and signal problems in the field. You can configure BER tests on each of the 28 T1 lines but only one
BER test can be active at a time.
There are two categories of test patterns that can be generated by the onboard BER test circuitry:
pseudorandom and repetitive. The former test patterns are polynomial based numbers and conform to
the CCITT/ITU O.151 and O.153 specifications; the latter test patterns are zeros or ones, or alternating
zeros and ones.
A list of the available test patterns follows:
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PA-MC-2T3+ Multi-Channel T3 Port Adapter Installation and Configuration
5-16
Router(config)# controller T3 1/0
Router(config-controller)# t1 1 loop remote line fdl ansi
In the preceding examples, remote line FDL ANSI loopback sends a repeating 16-bit ESF data link
code word (of 00001110 11111111) to the remote end, requesting that it enter into a network line
loopback.
Set the first T1 line into remote line FDL bellcore loopback
The example that follows is for a port adapter on a VIP in interface processor slot 1:
Router# configure terminal
Enter configuration commands, one per line.
Router (config)#controller t3 1/0/0
Router (config-controller)#t1 1 loop remote line fdl bellcore
The example that follows is for a port adapter in slot 1 of the Cisco 7200 series routers:
Router# configure terminal
Enter configuration commands, one per line.
Router (config)#controller t3 1/0
Router (config-controller)#t1 1 loop remote line fdl bellcore
In the preceding examples, remote line FDL bellcore loopback sends a repeating 16-bit ESF data
link code word (00010010 11111111) to the remote end, requesting that it enter into a network line
loopbacks.
Set the first T1 line into remote payload FDL ANSI loopback.
The example that follows is for a port adapter on a VIP in interface processor slot 1:
Router# configure terminal
Enter configuration commands, one per line.
Router(config)# controller T3 1/0/0
Router(config-controller)# t1 1 loop remote payload fdl ansi
The example that follows is for a port adapter in slot 1 of the Cisco 7200 series routers:
Router# configure terminal
Enter configuration commands, one per line.
Router(config)# controller T3 1/0
Router(config-controller)# t1 1 loop remote payload fdl ansi
In the preceding examples, remote payload ANSI loopback sends a repeating 16-bit ESF data link
code word (of 00010100 11111111) to the remote end, requesting that it enter into a network
payload loopback.
Pseudorandom test patterns:
2^11 (per CCITT/ITU O.151)
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Chapter 5
Configuring Channelized mode for the Cisco PA-MC-2T3+
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