[die_sekte]

It's probably best to get yourself some books. The online documentation for both Asterisk and FreeSWITCH is shit, the IRC channels are mostly useless unless you already know a lot and the configuration files are just plain weird (Asterisk uses ini-style files with embedded programming, FreeSWITCH's configuration format pretends to be XML (which it certainly isn't)). Asterisk also has severe performance problems and AFAIR has some extremely bad code.

[nimish79]

The entire idea with Plivo (much like Twilio and Tropo) is to simplify i.e. let web developers build telephony apps without having to learn much about a telephony engine.