HP MSR2000/3000/4000 Router Series Interface Command Reference

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For LOS, the value of pulse-detection is 176 and the value of pulse-recovery is 22. A LOS alarm is
created if the number of pulses detected within 176 pulse intervals is less than 22.
Views
CT1/PRI interface view
Predefined user roles
network-admin
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
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 alignment (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
lost.
• The level-2 keyword specifies generating an LFA alarm when two of five frame alignment bits are
lost.
• The level-3 keyword specifies generating an LFA alarm when two of six frame alignment bits are
lost.
• The level-4 keyword applies only to ESF frames. It specifies generating an LFA alarm when errors
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, is in the range of 16 to 4096.
The threshold of pulse-recovery is in the range of 1 to 256.
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.
Examples
# Set the number of detection intervals to 300 for the pulse detection duration threshold.
<Sysname> system-view
[Sysname] controller t1 2/0
[Sysname-T1 2/0] alarm-threshold los pulse-detection 300
bert (CT1/PRI interface)
Use bert to start a BERT test on a CT1/PRI interface.
Use undo bert to stop the BERT test running on the CT1/PRI interface.