Executive Guide: VoIP
The VoIP bloggers we read
Speaking of VoIP with Russ Shaw
VoIP series references
What are media gateways and how do H.323, SIP, MGCP and other support protocols work?
Learning Guide: How is transmitting voice different from sending data?
Leaning Guide: What causes VoIP QoS problems?
How does VoIP work? A technical guide to functional VoIP
Paving the pathway to a voice over IP network
Adding VoIP to an existing network
Top 25 voice terms of 2005