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FUNDAMENTAL CE3 INTERFACE
CONFIGURATION COMMANDS
bert (CE3 Interface)
Syntax bert pattern { 2^7 | 2^11 | 2^15 | qrss } time number [ unframed ]
undo bert
View CE3 interface view
Parameter pattern: Specifies BERT test mode, which can be 2^7, 2^11, 2^15, and QRSS.
2^7: Specifies the code stream transmitted is the 7th power of 2 bits in length.
2^11: Specifies the code stream transmitted is the 11th power of 2 bits in length.
2^15: Specifies the code stream transmitted is the 15th power of 2 bits in length.
qrss: Specifies the code stream transmitted is the 20th power of 2 bits in length
and the number of successive 0s in the code stream is no more than 14.
time number: Sets the duration (in minutes) of a BERT teat. The number argument
is in the range 1 to 1,440.
unframed: Sets the overhead bits of the padding frames for BERT test.
Description Use the
bert command to enable BERT test.
Use the
undo bert command to disable BERT test.
Multiple BERT test modes exist, as defined in ITU O.151, ITU O.153, and ANSI
T1.403-1999. Currently, 2^7, 2^11, 2^15, and QRSS are available on a CE3
interface.
To perform a BERT test, the local end transmits test data stream, which is returned
after reaching specific nodes. The local end then checks for the bit error rate by
comparing the returned data stream with the original, through which the state of
the link can be determined. BERT test requires that data stream can be looped
back on specific nodes. You can achieve this by enabling remote loop back on the
peer.
You can use the bert command to set the test mode and the test duration. During
the process of a BERT test, you can check the state and the result of the test. For
more information, refer to “display controller e1” on page 205.