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ODU-AIS

 

Table 1: Condition Details

Parameter

Description

Code

odu-ais

Description/Cause

ODU Alarm Indication Signal: The local interface has received an ODU-AIS signal from the NE at the far end of the fiber, indicating that no OTN OTU or OTN ODU signal is being transmitted upstream of (and toward) the local NE. (See also Maintenance Signaling.)

In addition to standard use of ODU-AIS signals, the BTI7800 originates an ODU-AIS signal in the following situations:

  • A multiplexed ODU sub-interface transmits an ODU-AIS signal when the sub-interface detects an ODTG tributary mismatch.

  • On a UFM6, an optical channel transmits a default ODU4 signal containing ODU-AIS for each ODU4 interface not created.

Entities Affected

  • OTN OTU interfaces (see respective table below).

  • OTN ODU interfaces (see respective table below).

Default Severity

Not alarmed.

Service Affecting

Yes (true).

Condition Clearing

See Clearing an ODU-AIS condition.

Related Fault Hierarchy

See OTN interface fault hierarchy.

Table 2: OTN OTU Interfaces

Entity Name

 

Fault Indicator

Module

Indicator

Status

otu4:<chassis>/<slot>/<subslot>/<port>

UFM4

otu4:<chassis>/<slot>/<2>/<1>/<subport.och.tributary>

UFM6

Table 3: OTN ODU Interfaces

Entity Name

 

Fault Indicator

Module

Indicator

Status

odu4:<chassis>/<slot>/<2>/<1>/<subport.och.tributary>

UFM6

odu3:<chassis>/<slot>/2/1/<subport.och.tributary.sub-interface>

odu2:<chassis>/<slot>/2/1/<subport.och.tributary.sub-interface>

odu2e:<chassis>/<slot>/<2>/<1>/<subport.och.tributary.sub-interface>

odu4:<chassis>/<slot>/<1>/<1>

UFM4

odu4:<chassis>/<slot>/<subslot>/<port>

1x CFP BIC

odu2:<chassis>/<slot>/<subslot>/<port.sub-interface>

odu2e:<chassis>/<slot>/<subslot>/<port.sub-interface>

Note: Supported on UFM3 only.

odu2:<chassis>/<slot>/<subslot>/<port>

12x SFP+ BIC

odu2e:<chassis>/<slot>/<subslot>/<port>

Note: Supported on UFM3 only.

Clearing an ODU-AIS Condition

Note

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

  1. Check for and clear all alarms upstream of the local NE.
  2. Check for conditions on the local interface.
    • If the condition clears, you have completed this procedure.

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