Plivo sip implementation is great, played with their API, on a few side projects and their documentation is straight forward. Support is excellent, highly reco

Plivo sip implementation is great, played with their API, on a few side projects and their documentation is straight forward. Support is excellent, highly recommend their sip API. Especially since they are showing devs a ton of love, http://blog.plivo.com/post/45362689649/free-plivo-developer-accounts-for-life http://blog.plivo.com/post/45362689649/free-plivo-developer-...