可配置的代理呼叫 Configurable Proxy Pinging
代理呼叫会话控制功能 Proxy CSCF ; Proxy-Call Session Control Function ; I-CSCF ; Interrogating CSCF
呼叫代理 call agent ; Call Proxy
呼叫代理服务器 call proxy server
SIP主要采用三种呼叫方式建立连接：直接呼叫、重定向呼叫和代理呼叫。
SIP mainly adopts3ty pes of calling modes to establish connection:direct call, re-direct call and agent call.
该系列文章的各部分中使用的例子都是基于一个场景，在该场景中，一个呼叫中心代理需要检索某一特定客户的信息。
The example used in both parts of this article series is based on a scenario where a call center agent needs to look up information for a particular customer.
要实现这些操作，需要有一个应用程序在呼叫的中间位置充当背靠背的用户代理，并提供对上述服务的访问。
To make these actions happen, you need an application to sit in the middle of the call, act as a back-to-back user agent, and provide access to the services mentioned.
应用推荐