WIRELESS CONFERENCE PHONE SYSTEM USING VOIP

摘要

PURPOSE: A wireless conference phone system using a VoIP(Voice over Internet Protocol) is provided to use a VoIP technology for communication with an overseas branch office and buyers in a remote site for a long time at a low price. CONSTITUTION: A handset(100) wirelessly transceives voice and DTMF(Dual Tone Multi-Frequency). A base set(200) transceives voice signals or DTMF with the handset(100). A PC(300) is connected with the handset(100) through a USB(Universal Serial Bus). An Internet network(500) is connected with the PC(300) through a LAN(Local Area Network). A user terminal(800) is connected through the Internet network(500). If the handset(100) transmits voice and DTMF signals, the base set(200) receives the signals and transmits digital packet signals to a terminal of the other party through the USB of the PC(300) over the Internet. For a receiving case, the user terminal(800) or a wireless conference phone transmits signals to the base set(200), and the base set(200) wirelessly transmits the signals to the handset(100) for communication. And the user terminal(800) and the base set(200) are connected with each other through local PSTNs(Public Switched Telephone Networks)(400,700).