Loopback > VC4
Use the Loopback > VC4 subtab to initiate cross-connect card loopbacks for VC4s. For a list of ONS nodes and cards that support this subtab, see Maintenance.
 
VC4
Shows the Port and VC4 numbers that are available for a cross-connect card loopback.
XC Loopback
When checked, initiates a cross-connect card 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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