Loopback


Use the Loopback (or Loopback > Port) subtab to initiate terminal or facility loopbacks.

Port

The port number.

Admin State

The port administration state. Choosing an administrative state from the drop-down list and clicking Apply changes the port's service state unless network conditions prevent the change. Admin states include:

  • unlocked-Puts the port in-service. The port service state changes to unlocked-enabled.

  • locked,disabled-Removes the port from service and disables it. The port service state changes to unlocked-enabled,disabled.

  • locked,maintenance-Removes the port from service for maintenance. The port service state changes to unlocked-enabled,maintenance. For loopbacks, the locked,maintenance admin state must be initiated.

  • unlocked,automaticInService-Puts the port in automatic in-service. The port service state changes to unlocked-disabled,automaticInService.

Service State

An autonomously generated state that gives the overall condition of the port. Service states appear in the format: Primary State-Primary State Qualifier, Secondary State. Port service states include:

  • unlocked-enabled-The port is fully operational and performing as provisioned.

  • unlocked-enabled,disabled-The port is out-of-service and unable to carry traffic.

  • unlocked-enabled,maintenance-The port is out-of-service for maintenance. Alarm reporting is suppressed, but traffic is carried and loopbacks are allowed.

  • unlocked-disabled,automaticInService-The port is out-of-service, but traffic is carried. Alarm reporting is suppressed. The ONS node monitors the ports for an error-free signal. After an error-free signal is detected, the port stays in unlocked-disabled,automaticInService state for the duration of the soak period. After the soak period ends, the port service state changes to unlocked-enabled.

Loopback Type

Allows you to provision a terminal or facility loopback, or clear an existing current loopback (none). Loopbacks can only be provisioned when the service state is unlocked-enabled,maintenance.

Inhibit Lbk

(Inhibit loopback does not appear on all cards.) When selected, inhibits far-end loopback.

Apply

Applies changes made to the fields in the tab.

Reset

Cancels any changes to the tab and returns the fields to their last-saved settings.

Help

Displays context-sensitive help.