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.
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.
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。
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