Cisco Cisco IOS Software Release 12.0(19)S

To set the threshold values for the BER Threshold Crossing Alarms, use the following interface 
configuration commands:

pais

Path Alarm Indication Signal, or Alarm 
Indication Signal—Path (AIS-P)

Administrative Unit Alarm Indication 
Signal (AU-AIS)

plop

Path Loss of Pointer, or Loss of 
Pointer—Path (LOP-P)

Administrative Unit Loss of Pointer 
(AU-LOP)

prdi

Path Remote Defect Indication, or 
Remote Defect Indication—Path (RDI-P)

High Order Path Remote Defect 
Indication (HP-RDI)

sd-ber

Line BIP BER in excess of the Signal 
Degrade (SD) threshold

Multiplexer Section BIP BER in excess of 
the Signal Degrade (SD) threshold

sf-ber

Line BIP BER in excess of the Signal Fail 
(SF) threshold

Multiplexer Section BIP BER in excess of 
the Signal Fail (SF) threshold

slof

Section Loss of Frame (LOF)

Regenerator Section Loss of Frame 
(LOF)

slos

Section Loss of Signal (LOS)

Regenerator Section Loss of Signal 
(LOS)

Set the Threshold values using the following commands:

Sets the bit error rate (BER) threshold of the 
specified alarms for the POS interface. 

rate for each command can be 3 to 9.

The default rates are listed below. 

Use the no form of the command to return the 
settings to the default rate

 for descriptions of the 

alarms and events.

Router(config-if)# [no] POS threshold b1-tca rate

B1 BER threshold crossing alarm. 
Default: 6 (10e-6)

Router(config-if)# [no] POS threshold b2-tca rate

B2 BER threshold crossing alarm. 
Default: 6 (10e-6)

Router(config-if)# [no] POS threshold b3-tca rate

B3 BER threshold crossing alarm. 
Default: 6 (10e-6)

Router(config-if)# [no] POS threshold sd-ber rate

Signal degrade BER threshold. Default: 6 (10e-6)

Router(config-if)# [no] POS threshold sf-ber rate

Signal failure BER threshold. Default: 3 (10e-3)