Patent ID: 6240085
Filing Date: 2001-05-29
Classification: H04L,H04M,H04Q

Abstract:
A communication server connected both to a line switching network to which a plurality of telephones are connected and to a packet switching network to which a plurality of communication devices are connected, comprising:means for establishing a connection for a voice communication between the communication server and one of the communication devices;means for receiving a voice communication request including information specifying one of the telephones, the request being issued by said one of the communication devices and transmitted via the packet switching network;means for establishing a call between the communication server and said one of the telephones specified by the information in the received voice communication request, while maintaining the connection between the communication server and said one of the communication devices; andmeans for continuing the communication only when none of a call releasing request and a voice communication end notice is received via the line switching network and the packet switching network is received.