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APSD

 

Table 1: Alarm Details

Parameter

Description

Code

apsd

Description

Automatic Power Shutdown: The local port has automatically shut down its laser because either the optical power received has dropped below the Loss of Light, Receive threshold or APSD has been triggered on the NE at the far end of the fiber.

For more information about APSD, see the BTI7800 Series Software Configuration Guide.

Entities Affected

  • DOL ports (see respective table below).

  • Terminal amplifier line ports (see respective table below).

Possible Causes

  • The fiber connection is poor.

  • There is a problem with the fiber.

  • There is a problem at the far-end transmitter.

Default Severity

Critical

Service Affecting

Yes (true).

Alarm Clearing

See:

Related Fault Hierarchy

See:

Table 2: DOL Ports

Entity Name

 

Fault Indicator

Module

Indicator

Status

port:<chassis>/<slot>/0/L1

ROADM2 or ILA

Fault LED, L1 port

On

port:<chassis>/<slot>/0/C<n>

where the range of n depends on the module.

Fault LED, C<n> port

Table 3: Terminal Amplifier Line Ports

Entity Name

 

Fault Indicator

Module

Indicator

Status

line:<chassis>/<slot>/1/<portNum>

AMP1

Fault LED, Line port

On

Clearing an APSD Alarm (DOL Port)

Note

Follow all applicable safety requirements as described in the BTI7800 Series Hardware Overview and Installation Guide.

  1. Check for and clear the following alarms and conditions:

    • LoLightRx raised against the DOL OSC and the DOL OMS

    • ContComS raised against the DOL OSC

    • OmsAis raised against the DOL OMS

  2. Check for alarms on the DOL port.

    • If the alarm has cleared, you have completed this procedure.

    • If the alarm does not clear, go to the next step.

  3. Check for and clear an APSD alarm on the NE at the far-end of the fiber.
  4. Check for alarms on the local DOL port.

    • If the alarm has cleared, you have completed this procedure.

    • If the alarm does not clear, contact your next level of support.

Clearing an APSD Alarm (terminal Amplifier Line Port)

Note

Follow all applicable safety requirements as described in the BTI7800 Series Hardware Overview and Installation Guide.

  1. Check whether an LoLightRx alarm has been raised against the input amplifier Optical Supervisory Channel on the line port, and clear the alarm if it exists.
  2. Check for alarms on the terminal amplifier line port.

    • If the alarm has cleared, you have completed this procedure.

    • If the alarm does not clear, go to the next step.

  3. Check for and clear an APSD alarm on the far-end NE.
  4. Check for alarms on the local terminal amplifier line port.

    • If the alarm has cleared, you have completed this procedure.

    • If the alarm does not clear, contact your next level of support.