cisco统一通讯IP电话开发向导，英文版本，看到现在有很多和我一样做这方面开发而没有资料的同志在辛苦的找资料，所以拿来分享一下-cisco unified communications IP telephone development wizard, the English version, see now there are many like me do in this area and do not have information on the development of the c

本文档是一份介绍有关SIP协议方面的资料，对入门者了解SIP有一定的帮助。资料为英文-This document is a brief us on SIP protocol information, for beginners to understand the SIP have some help. Information in English