SIP is currently the basic signaling and call setup protocol for IP telephony, and SIP applications are the basic way to provide voice and other multimedia services over IP.
SIP是当前IP电话的会话建立和信令控制的基础协议，SIP应用也是实现基于IP网络的语音等多种多媒体应用的基本途径。
This information is sent as a setup message by the signaling gateway back to the MGC.
这种消息作为建立的消息由信令网关发回给mgc。
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.
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.
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。
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