Starting/Terminating A Bert Test On A Ct1 Interface; Configuring Error Packets Diffusion Restraint - HP HSR6800 Configuration Manual

Step
19. Shut down the CT1/PRI
interface.
20. Return to system view
21. Enter the view of the
synchronous serial interface
created on the CT1 interface.
22. Set the CRC mode.
Note:
1. B8ZS = Bipolar 8 zero substitution; 2. ESF = Extended super frame; 3. LOS = Loss of signal; 4. AIS = Alarm
indication signal; 5. LFA = Loss of frame align

Starting/terminating a BERT test on a CT1 interface

Bit error rate test (BERT) operates as follows:
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 checks the received pattern for the bit error rate, and by so doing helps 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 display the state and result of the BERT test with the display controller t1 command.
To start/terminate a BERT test on a CT1 interface:
Step
1. Enter system view.
2. Enter CT1 interface view.
3. Start a BERT test.

Configuring error packets diffusion restraint

Error packets diffusion occurs when the error packet received on one timeslot spreads to other timeslots.
You can suppress error packet diffusion by configuring three parameters: detection period (detect-timer),
renew-timer (renew-timer), and PER threshold (threshold).
If the packet error rate for the detection period exceeds the PER threshold, the interface automatically
shuts down to avoid the risk of error packets diffusion. At the same time, the renew timer starts. When the
timer expires, the interface automatically comes up.
To configure error packets diffusion restraint:
Command
shutdown
quit
interface serial
interface-number:set-number
or
interface serial
interface-number:23
crc { 16 | 32 | none }
Command
system-view
controller t1 number
bert pattern { 2^20 | 2^15 } time
minutes [ unframed ]
31
Remarks
Optional.
A CT1 interface is up by default.
N/A
N/A
Optional.
By default, 16-bit CRC is adopted..
Remarks
N/A
N/A
By default, no BERT test is
performed.