论文部分内容阅读
ISDN(综合业务数字网)控制器起用户网络接口作用,这种接口可为一个或多个ISDN终端服务。PEB 2070微片提供两条64 kb/s的线路交换数字信道(即两条B信道)和一条面向信息的16 kb/s的D信道。D信道载送信令信息、遥测数据和分组交换数据。在D信道上的链路访问规约(LAPD)是以X.25通信规约LAPS为基础的。
ISDN (Integrated Services Digital Network) controller acts as a user network interface for one or more ISDN terminals. The PEB 2070 chip provides two 64 kb / s line-switched digital channels (ie, two B-channels) and an information-oriented 16 kb / s D channel. D channel carries signaling information, telemetry data and packet switched data. The link access protocol (LAPD) on the D channel is based on the X.25 communication protocol LAPS.