R3303-HP HSR6800 Routers Interface Command Reference

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time-number: Duration of a BERT test, in the range of 1 to 1440 minutes.
Usage guidelines
ITU O.151, ITU O.153, and ANSI T1.403-1999 define many BERT patterns, among which 2^7, 2^11,
2^15, and QRSS are supported.
When running a BERT test, the local end sends out a pattern, which is looped over somewhere on the line
and back to the local end. The local end then examines the received pattern for the bit error rate to help
you determine whether the condition of the line is good. To this end, you must configure loopback to
allow the transmitted pattern to loop back from somewhere on the line, for example, from the far-end
interface by placing the interface in far-end loopback.
You can view the state and result of a BERT test with the display controller cpos t3 command.
Examples
# Run a 10-minute QRSS BERT test on T3 channel 2 of interface CPOS 2/0/0.
<Sysname> system-view
[Sysname] controller cpos 2/0/0
[Sysname-Cpos2/0/0]t3 2 bert pattern qrss time 10
t3 set clock
Use t3 set clock to set clock mode for a T3 channel.
Use undo t3 set clock to restore the default.
Syntax
t3 t3-number set clock { master | slave }
undo t3 t3-number set clock
Default
The clock mode of a T3 channel is slave.
Views
CPOS interface view
Default command level
2: System level
Parameters
t3-number: Number of a T3 channel on the current CPOS interface, in the range of 1 to 3.
master: Sets the clock mode to master.
slave: Sets the clock mode to slave.
Usage guidelines
You can configure different clock modes for different T3 channels depending on the device each T3
channel is connected to. For example, when a T3 channel is connected to a SONET/SDH device, set its
clock mode to slave. When two devices are directly connected through an optical fiber, set different clock
modes for the two ends.
The clock mode of a T3 channel of a CPOS interface is independent of that of any other T3 channel of
the CPOS interface.