Circuit States


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

Circuit State
Cross-Connect Service State
Definition

unlocked

unlocked-enabled

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

locked

unlocked-disabled,automaticInService

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 high-order or low order circuits with cross-connects in unlocked-disabled, automaticInService generally switch to unlocked when source and destination ports are unlocked-enabled.

locked-enabled, 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.

locked-enabled, maintenance

locked-enabled, 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.

locked-enabled,outOfGroup

Applies to VCAT circuits only. This state is used to place a member circuit out of the group and to stop sending traffic. locked-enabled,outOfGroup only applies to the cross-connects on end node where VCAT resides. For the intermediate nodes, the cross connections are locked-enabled,maintenance.

locked
[PARTIAL]

Mixed

PARTIAL is appended to the locked circuit service state when circuit cross-connect states are mixed and not all in unlocked-enabled. The locked-PARTIAL state can occur during automatic or manual transitions between states. For example, locked-PARTIAL appears if some cross-connects are in the unlocked-enabled service state while others are in the unlocked-disabled,automaticInService service state. locked-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.