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10-6
Cisco ONS 15454 SDH Reference Manual, R5.0
April 2008
Chapter 10 Circuits and Tunnels
10.2.2 Circuit States
• If all cross-connects in a circuit are in the Locked-enabled,maintenance;
Unlocked-disabled,automaticInService; or Locked-enabled,disabled service state, the circuit
service state is Locked.
• Partial is appended to the Locked circuit service state when circuit cross-connects state are mixed
and not all in the Unlocked-enabled service state. The Locked-partial state can occur during
automatic or manual transitions between states. The Locked-partial service state 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. Refer to the Cisco ONS 15454 SDH
Troubleshooting Guide for troubleshooting procedures. The Locked-partial circuit state does not
apply to OCHNC circuit types.
The state of a VCAT circuit is an aggregate of its member circuits. An In Group member has
cross-connects in the Unlocked-enabled; Unlocked-disabled,automaticInService; or
Locked-enabled,maintenance service states. An Out of Group member has cross-connects in the
Locked-enabled,disabled; or Locked-enabled,outOfGroup service states. You can view whether a VCAT
member is In Group or Out of Group in the VCAT State column on the Edit Circuits window.
• If all member circuits are Unlocked, the VCAT circuit is Unlocked.
• If all In Group member circuits are Locked, the VCAT circuit state is Locked.
• If no member circuits exist or are all Out of Group, the state of a VCAT circuit is Locked.
• A VCAT circuit is Locked-partial when In Group member states are mixed and not all in the
Unlocked state.
You can assign a state to circuit cross-connects at two points:
• During circuit creation, you can set the state on the Create Circuit wizard.
• After circuit creation, you can change a circuit state on the Edit Circuit window or from the
Tools > Circuits > Set Circuit State menu.
During circuit creation, you can apply a service state to the drop ports in a circuit; however, CTC does
not apply a requested state other than Unlocked-enabled to drop ports if:
• The port is a timing source.
• The port is provisioned for orderwire or tunnel orderwire.
• The port is provisioned as a DCC or DCC tunnel.
• The port supports 1+1 or multiplex section-shared protection ring (MS-SPRing).
Circuits do not use the soak timer, but ports do. The soak period is the amount of time that the port
remains in the Unlocked-disabled,automaticInService service state after a signal is continuously
received. When the cross-connects in a circuit are in the Unlocked-disabled,automaticInService service
state, the ONS 15454 SDH monitors the cross-connects for an error-free signal. It changes the state of
the circuit from Locked to Unlocked or to Locked-partial as each cross-connect assigned to the circuit
path is completed. This allows you to provision a circuit using TL1, verify its path continuity, and
prepare the port to go into service when it receives an error-free signal for the time specified in the port
soak timer.
To find the remaining port soak time, choose the Maintenance > AINS Soak tabs in card view and click
the Retrieve button. If the port is in the Unlocked-disabled,automaticInService state and has a good
signal, the Time Until IS column shows the soak count down status. If the port is
Unlocked-disabled,automaticInService and has a bad signal, the Time Until IS column indicates that the
signal is bad. You must click the Retrieve button to obtain the latest time value.
For more information about cross-connect states, see Appendix B, “Administrative and Service States.”