大型语音网关fxo盘程序，支持二次拨号、来电显示等功能，汇编语音。-large voice gateway Foreign exchange office set procedures, to support the Second dialing, caller ID and other functions, compiled voice.

这是一篇关于p2p协议和sip协议互通的文章,他们共同作用来实现分布式的功能:语音,视频,文件等功能-This an agreement on p2p sip agreement and the exchange of articles, they work together to achieve distributed functions : voice, video, documents, etc. Function