Circuit Attributes: VC Low-Order Path Tunnel
(ONS 15454 SDH only) Use the Circuit Attributes page to provision basic circuit parameters. The following table describes the Circuit Attributes page fields and buttons that appear for low-order path tunnels.
 
Item
Description
Name
Displays the circuit name. The name can be alphanumeric and up to 48 characters (including spaces). Circuit names should be 44 characters or less if you want to preserve the ability to create monitor circuits. If you leave the field blank, CTC assigns a default name to the circuit.
Type
(Display only) VC_LO_PATH_TUNNEL.
Size
(Display only) VC4.
For VC3 Port Grouping
(Display only) Checked if you selected For VC3 Port Grouping in the Circuit Creation page.
Bidirectional
(Display only) Checked is the default for a low-order path tunnel.
State
Lists the administrative states. An administrative state puts the circuit cross-connects into the related service state if network conditions allow:
unlocked: Puts the circuit cross-connects in the unlocked-enabled service state.
locked,disabled: Puts the circuit cross-connects in the locked-enabled,disabled service state. Traffic is not passed on the circuit.
locked,maintenance: Puts the circuit cross-connects in the locked-enabled,maintenance service state. The locked-enabled,maintenance service state does not interrupt traffic flow; it suppresses alarms and conditions and allows loopbacks to be performed on the circuit. Use the locked,maintenance administrative state for circuit testing or to suppress circuit alarms temporarily. Change the administrative state to unlocked; unlocked,automaticInService; or locked,disabled when testing is complete.
unlocked,automaticInService: Puts the circuit cross-connects in the unlocked-disabled,automaticInService service state. Alarms and conditions are suppressed. When the connections receive a valid signal, the service state automatically changes to unlocked-enabled.
locked,outOfGroup: (VCAT circuits only) Puts the circuit cross-connects in the locked-enabled,maintenance & outOfGroup service state. The locked,outOfGroup administrative state is used to place a VCAT member circuit out of the group and to stop sending traffic. locked,outOfGroup only applies to the cross-connect on the end node where the VCAT resides.
For additional state information, see States.
Apply to drop ports
Applies the state chosen in the State field to the circuit source and destination ports. CTC applies the circuit state to the ports only in the following cases:
The circuit bandwidth is the same as the port bandwidth.
The port bandwidth is larger than the circuit and the circuit is the first circuit to use the drop port.
A Warning dialog box shows the ports where the circuit state could not be applied. If the box is unchecked, CTC does not change the state of the source and destination ports.
Back
Displays the Circuit Creation page.
Next
Displays the Circuit Source page.
Cancel
Cancels circuit creation.
Help
Displays context-sensitive help.

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