摘要
本文对ISDN基本接入率下第一类网络终接器(NT1)的功能及实现方案进行了分析比较,在剖析了 S/T 接口和 U 接口之后,提出一种适于同步时间压缩复用(S-TCM)和回波消除器两种传输方式的 NT1模块化方案.
In this paper analysis and comparision are made on function and implemen- ting scheme of network termination type 1 at ISDN basic access rate.After analysing S/T interface and U interface,the paper presents a modular Configura- tion of NT1 and an internal frame,which are suitable for S-TCM or EC transmission method.
关键词
ISDN
数字通信
传输设备
网络接口
Integrated Services Digital Network(ISDN)
data transmission equipment
digital communications system
