基于DSP技术模数兼容的多通道数字电话系统设计方案。设计中采用了DSP，低比特率语音压缩编解码，信道复用，FLASH MEMORY，DSP和调制解调器通信等技术。在通用调制解调器构成的点对点通信平台上实现了两路语音的复用，传输及交换。-Modulus based on DSP technology compatible multi-channel digital telephone system design. Designed to use a DSP, low bit rate voice compression codec, channel multiplexing, FLASH MEMORY, DSP and modem communications technology. At GM modem point-to-point communication platform consisting of two on implementation of the road voice multiplexing, transmission and exchange.