Loopback (OSCM)
Use the Loopback subtab to retrieve loopback information for the OSCM DWDM card.
 
Item
Description
Port
Displays the port number.
Admin State
Sets the port administration state. Choose an administrative state from the drop-down list and click Apply to change the port service state unless network conditions prevent the change. Admin states include:
 •
IS—Puts the port in service. The port service state changes to In-Service and Normal (IS-NR).
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IS,AINS—Puts the port in automatic in-service. The port service state changes to Out-of-Service and Autonomous, Automatic In-Service (OOS-AU,AINS).
 •
OOS,DSBLD—Removes the port from service and disables it. The port service state changes to Out-of-Service and Management, Disabled (OOS-MA,DSBLD).
 •
OOS,MT—Removes the port from service for maintenance. The port service state changes to Out-of-Service and Management, Maintenance (OOS-MA,MT). For loopbacks, the OOS,MT admin state must be initiated.
Note
CTC will not allow you to change a port service state from IS-NR to OOS-MA,DSBLD. You must first change a port to the OOS-MA,MT service state before putting it in the OOS-MA,DSBLD service state.
Service State
Shows the autonomously generated state that gives the overall condition of the port. Service states appear in the format: Primary State-Primary State Qualifier, Secondary State. For additional state information, see States.
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
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.

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