Patent ID: 6904027

Claim:
A packet switched network for performing a call transfer service, comprising: a transferring end-point within said packet switched network and involved in a held call with a first subscriber and an active call with a second subscriber, said transferring end-point having an active port associated with said active call, a held port associated with said held call and at least one additional port; and a controlling node within said packet switched network and connected to said transferring end-point, in response to the initiation of a call transfer service by said transferring end-point of said first subscriber to said second subscriber, said controlling node establishing communication between said held call and said active call by relaying media packets between said active port to said first subscriber and said held port to said second subscriber wherein said first subscriber and said second subscriber communicating there between by using said active port associated with said transferring end-point as the destination address and wherein said connection to said transferring end-point has been disconnected by said controlling node allowing said transferring end-point to make and receive other calls; wherein said transferring end-point comprises a mobile station in wireless communication with an A-bis gateway within said packet switched local area network, said A-bis gateway having said active port, said held port and said at least one additional port associated therewith; and wherein said controlling node is an access node connected to said A-bis gateway, said access node being further adapted to order said A-bis gateway to disconnect said active call and said held call upon initiation of said call transfer service and wherein said A-bis gateway is an anchor A-bis gateway, and wherein said transferring end-point further comprises a non-anchor A-bis gateway, a moblie station being handed over from said anchor A-bis gateway to said non-anchor A-bis gateway prior to initiating said call transfer service, said non-anchor A-bis gateway having a media port associated with said mobile station and a non-anchor port associated therewith, said non-anchor port being connected to said active port, said access node being further adapted to order said non-anchor A-bis gateway to release said non-anchor port to disconnect said active port from said non-anchor port.