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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

    Table 3: OTN ODU Interfaces

    Entity Name

     

    Fault Indicator

    Module

    Indicator

    Status

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

    UFM6

    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.

    Modified: 2017-10-24