什麽是SIP – 會話初始化協定?
SIP是會話初始化協定的縮寫，是一種用於建立、修改和終止VOIP電話通話的IP電話信號協定。SIP由IETF 制訂，並作爲RFC 3261頒佈。
SIP 描述建立電話通話所需要的通信。詳情請見SDP協定。
SIP已席捲VOIP市場，該協定與 HTTP協定相似，是一種基於文本的、非常開放和靈活的協定，已在很大範圍內取代了H323標準。
Easy set up
Have your IT team deploy 3CX in a matter of days or even hours Pre-configured SIP trunks.
Do-it-yourself admin
3CX is so easy to manage your IT team can set up - or delegate to department Admins.
Cut call costs
Break free from expensive multi-year fixed contracts with a flat annual fee - no per user/per month.
Hosted or DIY
We let you choose - Windows or Linux, hosted by 3CX or self-hosted on Amazon, Digital Ocean, Azure or Google.