| 摘要 |
PURPOSE: A VoIP gateway differentiating a switching path by analyzing inputted numbers is provided to differentiate a switching path by analyzing digit numbers inputted from a PBX, thereby selectively performing a voice call through the Internet or a PSTN. CONSTITUTION: The first trunk interface module(21) is connected to a PBX(10). A number analyzer(22) dials a trunk access code from an extension subscriber of the PBX(10), and analyzes predetermined digits inputted to the first trunk interface module(21). A controller(24) decides whether to connect a voice speech path to an IP-based LAN or the Internet or to a PSTN on the basis of the analyzed digits. A voice data packetizer(25) packetizes inputted voice data to be transmitted through VoIP, when the voice speech path is connected to the LAN or the Internet. A switch(27) connects the voice speech path to the LAN, the Internet, or the PSTN according to a decided result of the controller(24). The second trunk interface module(28) is connected to the PSTN. An LAN connector(26) is connected to the LAN or the Internet.
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