什么是SDP – 会话描述协议?
SDP是会话描述协议的缩写，是描述流媒体初始化参数的格式，由IETF作为RFC 4566颁布。流媒体是指在传输过程中看到或听到的内容。
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.