附件M包括虚拟专用网应用中支持专用网互联的附加基本呼叫信令要求。
Annex m contains the additional basic call signalling requirement for the support of private network interconnection for VPN applications.
会话初始化协议(SIP)是IETF提出的IP电话呼叫信令协议，是一个基于文本的协议，用来创建、修改和终止多媒体呼叫与会话。
SIP is proposed by IETF as IP phone call order protocol which is totally a text modality that to be used to establish, modify and terminate multimedia calls and conversation.
为了支持多媒体业务，提供呼叫建立、会话控制、接纳控制等功能的信令协议必不可少。
To support the multimedia operation and supply the function such as call building and session control, the signal protocol is absolutely necessarily.
本文探讨了SIP协议性能测试方法与评价标准，提出了基于基本呼叫流程的测试方案，并对测试方案中SIP信令和媒体流的NAT穿越问题作了深入的分析。
This thesis discusses SIP performance test method and criterion, putting forward test schemes based on basic call flows and analyzing the problem of SIP signaling and media stream traversing the NAT.
IP电话网关主要功能为连接传统电话网与IP网络，完成多路呼叫的信令协议和语音格式的转换。
The main function of gateways is to connect IP network and traditional phone system, and provide multi-call signaling exchanging and the conversion of voice formats.
然后，为了能访问到呼叫方和被叫方的地址信息，电话局向信令网关发一个SS7消息。
The central office then sends an SS7 message to a signaling gateway in order to get access to calling and called address information.
可通过信令链路将 信令消息，比如用于呼叫建立、查询和应答监控消息以及话务量控制，从网络中的一个SS7节点路由到另一个 SS7 节点。
Signaling messages such as supervisory messages for call setup, query and reply and traffic control, will be routed through the signaling links from one SS7 node to another SS7 node in the network.
与传统的基于CTI技术的呼叫中心系统相比，本系统采用SIP协议作为信令协议，可以提供较好的扩展性和灵活性。
Compared with the traditional call center system based on CTI technology, this call center system adopts SIP as its signaling protocol, which will provide good extensibility and flexibility.
一个电话利用信令协议收回或领受呼叫。
A phone uses signinging protocols to pl_ design or receive a cmostly.
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。
This Recommendation specifies the DSS 1 signalling requirement on the N-ISDN user-network interface for the Explicit Call Transfer (ECT) supplementary service.
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