一份详细的SIP协议的数据流分析的文档，该文档有两百多页，包含的SIP消息的各种情况，内容实用，可供SIP协议的VoIP开发者做一份详细的SIP数据流的分析手册。-a detailed SIP protocol data flow analysis of the document, the document is over 200 pages and contains information of the various SIP, as practical, the SIP for VoIP d

PSTN to PSTN Dialing via SIP Network.This is a representation, as a slide show, of the SIP examples detailed in RFC 3666 - RFC3666 SIP PSTN Call Flow.-PSTN to PSTN Dialing via SIP Network.This i 's a representation, as a slide show. of the SIP ex