R0106-HP MSR Router Series Interface Command Reference(V7)

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Related commands
ft1 frame-format
ft1 alarm-threshold
Use ft1 alarm-threshold to set LOS, AIS, or LFA alarm thresholds on a T1-F interface.
Use undo ft1 alarm-threshold to restore the default.
Syntax
ft1 alarm-threshold { ais { level-1 | level-2 } | lfa { level-1 | level-2 | level-3 | level-4 } | los
{ pulse-detection | pulse-recovery } value }
undo ft1 alarm-threshold { ais | lfa | los { pulse-detection | pulse-recovery } }
Default
For AIS and LFA, the alarm threshold is level-1.
For LOS, the value of pulse-detection is 176 and the value of pulse-recovery is 22. A LOS alarm is
generated if the number of pulses detected within 176 pulse intervals is less than 22.
Views
T1-F interface view
Predefined user roles
network-admin
Parameters
ais: Specifies an AIS alarm.
• level-1: Specifies the condition when the number of zeros in the bit stream of an SF or ESF frame is
less than or equal to 2.
• level-2: Specifies one of the following conditions:
{ In an SF frame, the number of zeros is less than or equal to 3 in the bit stream.
{ In an ESP frame, the number of zeros is less than or equal to 5 in the bit stream.
lfa: Specifies an LFA alarm.
• level-1: Specifies the condition when two of four frame alignment bits are lost.
• level-2: Specifies the condition when two of five frame alignment bits are lost.
• level-3: Specifies the condition when two of six frame alignment bits are lost.
• level-4: Specifies the condition when errors are detected in four consecutive ESF frames. This
keyword is only available for ESF frames.
los: Specifies a LOS alarm.
• pulse-detection: Specifies the pulse detection duration threshold of the LOS alarm.
• pulse-recovery: Specifies the pulse threshold of the LOS alarm.
value: Specifies the value of the pulse-detection threshold or pulse-recovery threshold.
• For the pulse-detection threshold, this argument is in units of pulse intervals and in the range of 16
to 4096.
• For the pulse-recovery threshold, this argument is in the range of 1 to 256.