时分脉码交换是当前交换技术发展的主要方向,由时分脉码交换组成的数字通信网可以做到两个综合,即交换和传输的综合,以及通话和各种其他如数传等业务的综合。时分脉码交换的基本接续单元是T型时分接线器,它可以单独使用以组成无阻塞的小容量时分接续网,也可以和S型时分接线器一起组成大型数字交换网。本文准备以一个T型时分接线器单独使用为例,说明T型时分接线器的电路组成,具体实现以及交换接续原理。-Pulse code division switching technology exchange is currently the main direction of development, formed by the division of the digital pulse code switching can be done two integrated communication network, the integrated switching and transmission, and transfer calls and shown with a variety of other services such as comprehensive . Pulse code division switching unit is a continuation of the basic hours of T-connector, which can be used alone to form non-blocking network connecting the small hours of capacity, can and S-type connector with the composition of large-scale time-division digital switching network. This division is prepared to a T-connector used alone to illustrate the T-connector of the circuit division, and the concrete realization of the exchange follow the principle.