Circuit Attributes: VC High-Order Path Circuit


Use the Circuit Attributes page to provision the basic circuit parameters. The following table describes the Circuit Attributes page fields and buttons that appear for specific high-order path circuits.

Item

Description

Name

The circuit name. The name can be alphanumeric and up to 48 characters (including spaces). Circuit names should be 44 characters or less 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_HO_PATH_CIRCUIT.

Size

Sets the circuit size. Available high-order sizes are VC4, VC4-2c, VC4-3c, VC4-4c, VC4-8c, VC4-16c, VC4-64c.

Bidirectional

If checked, creates a bidirectional VC4 circuit.

Create cross-connects only (TL1-like)

Creates one or more cross-connects to complete a signal path for TL1-generated circuits. If this box is checked, you cannot assign a name to the circuit or choose an E-Series card as a circuit source or destination.

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,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.

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.

Provision working go & return on primary path

If checked, the shortest path is the working path for both traffic directions. If unchecked, only one direction makes the shortest path the working path.

Revertive

If checked, traffic reverts to the working path when the conditions that diverted it to the protect path are repaired. If unchecked, traffic remains on the protect path after the switch.

Reversion time

Available when Revertive is checked. Sets the amount of time (in minutes) that will elapse before traffic reverts to the working path. Traffic can revert when conditions causing the switch are cleared. The range is 0.5 to 12.0 minutes. The default is 5.0 minutes.

SF threshold

Sets the SNCP path-level signal failure bit error rate (BER) thresholds. Valid entries are IE-3, IE-4, and IE-5. Unavailable for low-order path circuits.

SD threshold

Sets the SNCP path-level signal degrade BER thresholds. Valid entries are IE-5, IE-6, IE-7, IE-8, and IE-9. Unavailable for low-order path circuits.

Switch on PDI-P

(Display only.) If checked, traffic switches when a VC4 payload defect indicator is received.

Protected Drops (non-Ethernet)

If checked, CTC displays only protected cards as source and destination choices, that is, to ONS cards that are in 1:1, 1:N, or 1+1 protection.

Back

Displays the Circuit Creation page.

Next

Displays the Circuit Source page.

Cancel

Cancels circuit creation.

Help

Displays context-sensitive help.