Patent ID: 7583655

Claim:
A communication network, comprising: a legacy subscriber server of a legacy network that is adapted to identify feature data for a legacy call feature being provided to a dual mode device when the dual mode device receives communication access through the legacy network; an application server of an IP Multimedia Subsystem (IMS) network that is adapted to provide an IMS call feature to the dual mode device when the dual mode device receives communication access through the IMS network; and an IMS subscriber server adapted to store feature data for the IMS call feature being provided to the dual mode device by the IMS network; the application server is adapted to receive a change to the feature data for the IMS call feature from the user of the dual mode device, and to notify the IMS subscriber server of the change to the feature data for the IMS call feature; and the IMS subscriber server is further adapted to update the feature data for the legacy call feature in the legacy subscriber server based on the change to the feature data for the IMS call feature to synchronize the feature data for the legacy call feature with the feature data for the IMS call feature.