| 摘要 |
PURPOSE: An IP-PBX(Internet Protocol-Private Branch eXchange) for supporting multiple channels using an SC-BUS is provided to install a chip and bus for supporting TDMA(Time Division Multiple Access) inside of the IP-PBX. CONSTITUTION: An IP-PBX(200) is comprised of a control part(310), an SSM(Subscriber Switch Module) part(320), a PSM(Public Switch Module) part(330), and a VSM(VoIP Switch Module) part(340). The control part(310), comprising CPU 1(312) and DPRAM 1(314), controls traffic channel allocation through the IP-PBX(200) and the transmission and reception of various data through allocated channels. The SSM part(320) is comprised of DPRAM 2(322), CPU 2(324), SC-BUS control part A(326), and a SLIC(Subscriber Line Interface Circuit)(328). The PSM part(330) is composed of DPRAM 3(332), CPU 3(334), SC-BUS control part B(336), a codec part(337), and a DAA(Data Access Arrangement)(338). The VSM part(340) is comprised of DPRAM 4(342), CPU 4(344), SC-BUS control part C(346), and a DSP(Digital Signal Processor)(348). The VSM part(340) modulates data, received from the SSM part(320) and the PSM part(330), using a VoIP technique in order to transmit the data through the Internet.
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