NAT OR FIRE WALL TRAVERSAL CALL METHOD FOR STANDARD INTERNET-PHONE IN LAN

摘要

A method for passing through a fire wall or an IP(Internet Protocol) sharer through a main-side local network of a standard Internet phone is provided to enable an NFTS(NAT(Network Address Translation) and Fire wall Traversal Server) to process a call, while an MRWS(Media Relay Worker Server) shares relay of media data during call to distribute call traffic, thus speech quality can be improved. A user of an Internet phone(11) designates a self IP and a port, and registers an IP and a port of the Internet phone(11) in an SSCS(SIP(Session Initiation Protocol) Signaling Control Server)(6-3), in binding type(R1). The SSCS(6-3) stores contact head information, record route information, a source(user) address, and a port number, then encodes the stored information into a message(R2). If the SSCS(6-3) transmits the encoded message to a proxy server(6-1) and receives an acknowledgement(R3,R4), the SSCS(6-3) decodes the message to pass through a fire wall(1-1) based on registered port socket information, and is registered so that the user of the Internet phone(11) can call(R5,R6).