数字多路系统(DMS)指的是Nortel网络开发的一个交换系统系列。它可以提供用于语音和数据传输的数字电路交换服务，数字传输的信息包交换服务。数字多路系统的特点是在整个交换网络中采用脉冲编码解调（PCM）和时分复用系统（TDM）。该系统允许对传输系统中的PCM信号进行直接交换而不需要转化成模拟格式。-Digital multi-channel system (DMS) refers to the Nortel Networks to develop a series of exchange system. It can provide for voice and data transmission of digital circuit-switched services, digital transmission of information packet-switched services. Digital multi-channel system is characterized by the exchange in the whole network using pulse code demodulator (PCM) and time division multiplexing system (TDM). The system allows for the transmission system of PCM signals without the need for direct exchange into analog format.