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。
Because SS7 has more intelligent capabilities than User-Network Interface protocols such as ISDN Primary Rate Interface, SS7 can help ease congestion across the Internet.
由于七号信令比诸如ISDN的基础速率接口等用户网络接口协议更具智能功能，所以七号信令有助减轻因特网上的拥挤。
Because SS7 has more intelligent capabilities than User-Network Interface protocols such as ISDN Primary Rate Interface, SS7 can help ease congestion across the Internet.
由于七号信令比诸如ISDN的基础速率接口等用户网络接口协议更具智能功能，所以七号信令有助减轻因特网上的拥挤。
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