SIP协议中文版 IETF RFC3261(SIP协议)的中文翻译版；觉得看英文比较慢的朋友可以先看看这个，有少量翻译错误请对照英文版校对-IETF RFC3261 (SIP) version of the Chinese translation; Think of English slower you can take a look at this, a small amount of translation errors in the English version control Please proofread