Patent ID: 7586885
Filing Date: 2009-09-08
Classification: H04L,H04M,H04W

Abstract:
1. A voice over Internet protocol (VoIP) wireless telephone system utilizing a wireless local area network (LAN), comprising: a session initiation protocol (SIP) server which manages an Internet protocol (IP) telephone subscriber information and an IP telephone connection information by the SIP for use in an IP telephone communication; a broadband access server (BAS) which manages issuance of an IP address and connection to an Internet by an Internet protocol control protocol (IPCP); an office device accommodating a broadband line; a broadband modem having a main telephone interface of the wireless LAN and a broadband line interface; a wireless LAN terminal which has an extension telephone interface of the wireless LAN and a VoIP interface, performs exchange between an audio signal of a telephone under the terminal and IP data on the wireless LAN side, and operates as a point-to-point protocol over Ethernet (PPPoE) client; and a telephone which is connected to the wireless LAN terminal when used, wherein first identifying information (ID) and password for connection to the Internet by the PPPoE are set in the wireless LAN terminal, and user authentication is executed with the first ID and password upon connection to the BAS through the office device to make the connection from the wireless LAN terminal to the Internet; the broadband modem relays by a bridge operation and transmits, to the BAS, an IP frame received from the wireless LAN terminal via the wireless LAN; the IP address is provided to the wireless LAN terminal by the BAS after the connection by the PPPoE; second ID and password for connection to the SIP server and a uniform resource locator (URL) of the SIP server are beforehand registered in the wireless LAN terminal, and connection from the wireless LAN terminal to the SIP server is made on the basis of the connection information and a telephone number of a connection destination designated by the telephone; the broadband modem transmits an IP frame received from the wireless LAN terminal to the SIP server by the bridge operation; and a session to a telephone talk destination is afterward established via the SIP server to make a communication.