Patent ID: 7188167

Claim:
A method for registering multiple communication devices in a Session Initiation Protocol (SIP) based communication system comprising the steps of: identifying a communication device for registration by a user for providing an identified communication device; setting a registration time of the identified communication device for registering the identified communication device of the user; selecting an expiration registration time corresponding to the identified communication device and based upon a type of the identified communication device, wherein the expiration registration time selected for a first type of identified communication device is a first value, wherein the expiration registration time selected for a second type of identified communication device, is a second value, the second value being greater than the first value; selecting a priority for the identified communication device based upon one or more of the type of the identified communication device, a type of registration by the user of the identified communication device and a location of the identified communication device, wherein the step of selecting the priority for the identified communication device further comprises: selecting a first priority based upon a location of a mobile station or based on a manual registration; and selecting a second priority for an automatic registration or re-registration, wherein the first priority is higher than the second priority; and storing the identified communication device, the priority, the registration time and the expiration registration time corresponding to the identified communication device in an entry in a database.