Circuit States


The following table describes the circuit service states that can appear on the node or card view Circuits tab. The State column on the Circuits tab shows an aggregate of the cross-connect service states.

Circuit State

Cross-Connect Service State

Definition

IS

IS-NR (In-Service and Normal)

The connection is fully operational and performing as provisioned. Traffic is carried.

OOS

OOS-MA,DSBLD (Out-of-Service and Management, Disabled)

Alarm reporting is suppressed. The cross-connect was manually removed from service and does not provide its provisioned functions. All services are disrupted; the cross-connect is unable to carry traffic.

OOS-AU,AINS (Out-of-Service and Autonomous, Automatic In-Service)

Alarm reporting is suppressed, but traffic is carried. Raised fault conditions, whether or not their alarms are reported, can be retrieved on the CTC Conditions tab or by using the TL1 RTRV-COND command. Specific synchronous transport signal (STS) or virtual tributary (VT) circuits with cross-connects in OOS-AU,AINS generally switch to IS when source and destination ports are IS-NR.

OOS-MA,MT (Out-of-Service and Management, Maintenance)

OOS-MA,LPBK (Out-of-Service and Management, Loopback)

Alarm reporting is suppressed, but traffic is carried and loopbacks are allowed. Raised fault conditions, whether or not their alarms are reported, can be retrieved on the CTC Conditions tab or by using the TL1 RTRV-COND command.

OOS-MA,OOG (Out-of-Service and Management, Out of Group)

Applies to virtual concatenated (VCAT) circuits only. This state is used to place a member circuit out of the group and to stop sending traffic. OOS-MA,OOG only applies to the cross-connects on end node where VCAT resides. For the intermediate nodes, the cross connections are OOS-MA,MT.

OOS
[PARTIAL]

Mixed

PARTIAL is appended to the OOS circuit service state when circuit cross-connect states are mixed and not all in IS-NR. The OOS-PARTIAL state can occur during automatic or manual transitions between states. For example, OOS-PARTIAL appears if some cross-connects are in the In-Service and Normal (IS-NR) service state while others are in the Out-of-Service and Autonomous, Automatic In-Service (OOS-AU,AINS) service state. OOS-PARTIAL can appear during a manual transition caused by an abnormal event such as a CTC crash or communication error, or if one of the cross-connects could not be changed.