Mike opened the presentation with a demo. He asked the audience for a cell phone number and ran a little script that drives an Asterisk Gateway Interface Manager program to call the number. The phone rang. The callee answered with the speaker on. An audio file played on the phone. The callee was then instructed to press 1, 2, or 3. He pressed 2. The script printed "pressed 2" on the screen and hung up the call.
Mike then proceeded to talk about VOIP and Asterisk technologies in terms that a non-specialist like me can understand. (The slides will be posted to the St. Louis JUG Knowledgebase in a few days.)
The presentation was lively with many audience member questions and answers. Some centered around the VOIP technology details and some centered around the business of Agilis Systems, which is by itself pretty interesting. The St. Louis Post-Dispatch did a write-up about them last year. You can find the article here.
BTW, they are hiring. They also invited JUG members to a Half-Life 2 Frag Fest. Sorry I did not copy down the details.