Tropo sits in Voxeo’s live communications cloud; an environment specifically designed for real-time voice, instant messaging and SMS applications. On the voice side, a key feature of the Tropo platform is its extensive support for SIP. The Session Initiation Protocol is a Voice over IP (VoIP) technology enabling two ends of a conversation (or session) to negotiate media formats much like the Accepts/Content-Type header does for HTTP.

As a voice provider, SIP is the best way to guarantee seamless interoperability between existing phone systems, carriers and call centers. Not having SIP is like playing Call of Duty on a 15” with no HDMI. Sure it technically works…. but why?!?

Read the full article here for a real world example.