Filter
Top Products
257
e1 bert
Syntax e1 line-number bert pattern { 2^11 | 2^15 | 2^20 | 2^23 | qrss } time number
[ unframed ]
undo e1 line-number bert
View CE3 interface view
Parameter line-number: E1 channel number, in the range 1 to 28.
pattern: Specifies BERT test mode, which can be 2^11, 2^15, 2^20, 2^23, and
QRSS.
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.
2^20: Specifies the code stream transmitted is the 20th power of 2 bits in length.
2^23: Specifies the code stream transmitted is the 23th 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
e1 bert command to enable BERT test for an E1 channel created on a
CE3 interface.
Use the
undo e1 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, 2^11, 2^15, 2^20, 2^23, and QRSS are available on E1
channels created on CE3 interfaces.
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.
Example # Perform BERT test in QRSS mode on E1 channel 1 created on CE3 2/0 interface,
setting the duration to ten minutes.