本建议涉及在S和T参考点处使用的一次群速率用户—网络接口的第1层电的、格式的和通路特性。

This Recommendation is concerned with the layer 1 electrical, format and channel usage characteristics of the primary rate user-network interface at the S and T reference points.

youdao

本文提出了ISDN基群速率接入的一种TDMA模式，描述了它的参考配置、协议配置和用户-网络接口中需新开发的第一层。

In this paper, the author presents a TDMA model for ISDV primary ac-cess, describes its reference configuration, its protocol configuration and its first layer of UNI which needs to be developed.

youdao