Kenneth Hunt points to Teamspeak:
15 minutes to deploy an anonymous server on my local lan and connect two windows boxes to the Debian server. Speex codec sounds decent from Plantronics headsets, definitely one to watch! Didn’t get time to dig into adminning the Teamspeak server, but it looks incredibly robust right now. If you’re interested in voip and oss codecs like speex it’s worth a closer look. Check back here for a link to the test server!
This is great. The Speex codec is quite good for compressing voice to itty bitty.