H3C SR6600 Command Reference Manual

Also see for SR6600 SPE-FWM: Configuration guide Configuration guide Configuration guide Command reference Command reference

H3C SR6600 Command Reference Manual Manual pdf 221 page image

5-34Default Level2: System levelParameterst3-number: Number of a T3 channel on the current CPOS interface, in the range of 1 to 3.pattern: Sets a bit error rate test (BERT) pattern, which can be 2^7, 2^11, 2^15, or qrss.z 2^7: Two to the seventh power, length (in bits) of the transmitted BERT pattern.z 2^11: Two to eleventh power, length (in bits) of the transmitted BERT pattern.z 2^15: Two to the fifteenth power, length (in bits) of the transmitted BERT pattern.z qrss: Two to the twentieth power, length of the transmitted BERT pattern in bits. This is theQuasi-random signal sequence (QRSS) BERT pattern, which does not allow the presence of 14consecutive zeros.time number: Sets the duration of a BER test, in the range of 1 to 1440 minutes.DescriptionUse the t3 set bert pattern command to start a BERT test on the specified T3 channel.Use the undo t3 set bert pattern command to stop the BERT test running on the specified T3 channel.By default, BERT is disabled.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 at present.When running a BERT test, the local end sends out a pattern, which is looped over somewhere on theline and back to the local end. The local end then checks the received pattern for the bit error rate, andby so doing helps you determine whether the condition of the line is good. To this end, you mustconfigure loopback to allow the transmitted pattern to loop back from somewhere on the line, forexample, 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. system-view[Sysname] controller cpos 2/0/0[Sysname-Cpos2/0/0]t3 2 bert pattern qrss time 10t3 set clockSyntaxt3 t3-number set clock { master | slave }undo t3 t3-number set clockViewCPOS interface viewDefault Level2: System levelParameterst3-number: Number of a T3 channel on the current CPOS interface, in the range of 1 to 3.