One of the key techniques of N-ISDN is how to redesign and reform the existing stored program control exchangers.
实现N—ISDN的关键技术之一是对现有程控交换机的改造。
The communicative services of B-ISDN has its own alternation services and distribution services in addition to the services of N-ISDN.
ISDN的通信服务除了能提供N - ISDN所提供的各种通信服务外，还能提供交换型服务和分配型服务，并有自己的服务特点。
This Recommendation specifies the DSS 1 signalling requirement on the N-ISDN user-network interface for the Explicit Call Transfer (ECT) supplementary service.
本建议规定了在N - ISDN用户-网络接口上用于明确呼叫转移(ECT)补充业务的DSS1信令要求。
This Recommendation specifies the DSS 1 signalling requirement on the N-ISDN user-network interface for the Explicit Call Transfer (ECT) supplementary service.
本建议规定了在N - ISDN用户-网络接口上用于明确呼叫转移(ECT)补充业务的DSS1信令要求。
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