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OCI

 

Table 1: Alarm Details

Parameter

Description

Code

oci

Description/Cause

Open Connection Indication, ODU: The local interface has received an ODU-OCI signal from the far-end NE, indicating that an optical cross-connect is not present on an upstream node.

Note: The local interface that receives the ODU-OCI signal raises this alarm only if the local interface is part of a cross-connect. If the local interface is not part of a cross-connect, the received ODU-OCI signal is ignored.

An interface transmits an ODU-OCI signal downstream if the interface is open (that is, not part of any cross-connect).

For multiplexed ODU interfaces, the ODU-OCI signal is transmitted (and therefore received) on the containing ODU interface, not on the individual ODU sub-interfaces. The containing ODU interface transmits the ODU-OCI signal if none of the contained ODU sub-interfaces is part of a cross-connect. The containing ODU interface stops transmitting the ODU-OCI signal if at least one of the contained ODU sub-interfaces is part of a cross-connect. The ODU-OCI signal on multiplexed interfaces does not indicate which specific sub-interface is open (that is, not part of a cross-connect).

Entities Affected

OTN ODU interfaces (see respective table below).

Default Severity

Critical

Service Affecting

Yes (true).

Alarm Clearing

See Clearing an OCI alarm.

Related Fault Hierarchy

See OTN interface fault hierarchy.

Table 2: OTN ODU Interfaces

Entity Name

Fault Indicator

Module

Indicator

Status

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

UFM6

Fault LED, 200-Gbps port, 400G Coherent MSA XCVR

On

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

Fault LED, 100-Gbps port, 100G Coherent MSA XCVR

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

1x CFP BIC

Fault LED, 100-Gbps port

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

Fault LED, 10-Gbps port

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

Note: Supported on UFM3 only.

Clearing an OCI Alarm

Note

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

  1. Provision the missing cross-connect. For information, see the BTI7800 Series Software Configuration Guide.
  2. Check for alarms on the local interface.

    • If the alarm clears, you have completed this procedure.

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