Open Source VoIP Overview and Update
Presented at ISPCON Spring 2007

This presentation reviews the top open source VoIP projects and provides a framework for evaluating them and others. It pays particular attention to: Asterisk, OpenSER, SIPX, Freeswitch, OpenSBC and JAIN.

Getting Connected with SIP Encryption
Presented at Communications Developer Conference 2007

This presentation discusses why VoIP calls are being blocked, how they are blocked, the approaches to avoid SIP blocking, and what you can do to leverage development efforts.