Patent ID: 7724730

Claim:
A computer readable medium storing a program executable by a voice communication server to perform a method for a voice communication process between a telephone connected to a line switching network employing a telephone number scheme and a plurality of communication devices connected to a packet switching network employing a communication address scheme which is different from the telephone number scheme, the method comprising the steps of: receiving a call setting request from the telephone, the call setting request including a telephone number according to the telephone number scheme for identifying one of the communication devices as a communication partner; transmitting a call setting response in response to the call setting request; obtaining a communication address of the communication device according to the communication address scheme identified by the telephone number in the call setting request; transmitting a voice communication request packet, whose destination is the obtained communication address, to the packet switching network for requesting the communication device to communicate with the telephone; receiving a voice communication response packet in response to the voice communication request packet from the communication device to which the obtained communication address is assigned; and performing the voice communication process between the telephone and the communication device when the voice communication response packet indicates an accepting response, wherein the voice communication request packet includes the communication address, according to the communication address scheme, which identifies the voice communication server in the packet switching network and the communication address, according to the communication address scheme, which identifies the communication device in the packet switching network.