Bert (Ct1 Interface) - HP 6600 Command Reference Manual

Parameters
ais: Sets the alarm threshold of alarm indication signal (AIS), which can be level-1 and level-2.
The level-1 keyword specifies generating an AIS alarm when the number of 0s in the bit stream of
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an SF or ESF frame is less than or equal to 2.
• The level-2 keyword specifies generating an AIS alarm when the number of 0s is less than or equal
to 3 in the bit stream of an SF frame or less than or equal to 5 in the bit stream of an ESP frame.
Level-1 AIS alarm threshold applies.
lfa: Sets the loss of frame align (LFA) alarm threshold, which can be level-1, level-2, level-3, and level-4.
The level-1 keyword specifies generating an LFA alarm when two of four frame alignment bits are
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lost.
The level-2 keyword specifies generating an LFA alarm when two of five frame alignment bits are
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lost.
The level-3 keyword specifies generating an LFA alarm when two of six frame alignment bits are
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lost.
The level-4 keyword applies only to ESF frames. It specifies generating an LFA alarm when errors
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are detected in four consecutive ESF frames.
Level-1 LFA alarm threshold applies.
los: Sets a loss of signal (LOS) alarm threshold, which can be pulse-detection (for the pulse detection
duration threshold with LOS) and pulse-recovery (for the pulse threshold with LOS).
The threshold of pulse-detection, in units of pulse intervals, ranges from 16 to 4,096 and defaults to 176.
The threshold of pulse-recovery, ranges from 1 to 256 and defaults to 22.
If the number of the pulses detected during the total length of the specified pulse detection intervals is
smaller than the pulse-recovery threshold, a LOS alarm occurs. For example, if the two thresholds take
their defaults, a LOS alarm is created if the number of pulses detected within 176 pulse intervals is less
than 22.
Examples
# Set the number of detection intervals to 300 for the pulse detection duration threshold.
<Sysname> system-view
[Sysname] controller t1 2/0/0
[Sysname-T1 2/0/0] alarm-threshold los pulse-detection 300

bert (CT1 interface)

Use bert to start a BERT test on a CT1 interface.
Use undo bert to stop the BERT test running on the CT1 interface.
Syntax
bert pattern { 2^15 | 2^20 } time minutes [ unframed ]
undo bert
Default
No BERT test is performed.
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