Abstract: A method for transferring subscriber location information in a network communication system, including: converting the accessed subscriber location information into a code in the encoding format of the corresponding field in a subscriber packet to be sent outwards by the subscriber, carrying the code in the subscriber packet, and transferring the packet in the network communication system. It is also provided a method for converting MAC address, including: a network access device generating an MAC address from an MAC address resource pool; and replacing the source MAC address in a packet from a subscriber with said generated MAC address. The methods are no longer restricted by the number of permitted VLAN IDs in the network, and thereby improve feasibility of subscriber location information acquisition, providing a convenience for network operators to implement relevant extended services in network communication systems.

Abstract: Disclosed herein is a system and method for Voice over Internet Protocol (VoIP) communication using an instant messenger (IM). The disclosed system sets up a phone terminal connected with the IM and set up a phone control module inside the IM. The disclosed method generally carries out the sending and receiving of instructions as well as carrying out voice processing through said phone terminal so as to accomplish voice-information communications between the calling and called terminals. The disclosed system and method provide a more practical technique, inasmuch as the set phone terminal may connect with the IM via a USB port or IEEE 1394 port. With the disclosed method and system, the drawbacks of current methods of phone communications using IM are overcome while the operation remains simple.