If you are using VRC integrated with PTC, you must use PTC to delete managed resources from the gateway.
If you are using VRC as a standalone application, refer to Attributes of a Gateway.
A gateway managed resource can be:
Voice port
Trunk group
Access list
An interface on the gateway
When you delete a managed resource from a gateway by using the PTC Topology Manager, PTC updates its database to remove the managed resource and notifies VRC that the gateway configuration has changed.
VRC validates the change and sets a reactivate flag on the gateway.
To remove the managed resource from the gateway in your dial plan, manually reactivate the gateway.