Related HowStuffWorks Articles

• How Telephones Work
• How Cell Phones Work
• How Web Servers Work
• How Home Networking Works
• How Internet Infrastructure Works
• How Routers Work
• How Speakers Work
• How Sound Cards Work
• How Modems Work
• How Cable Modems Work
• How DSL Works

Sponsored Links


• VoIP forum
• Buy Digium for Asterisk
• VoIP Phone Service Provider and Free PC Calls
• VoIP

More Great Links

• iptel.org: On-line Reference for Internet Telephony
• Cisco.com: Configuring VoIP for the Cisco 3600 Series
• Protocols.com: H.323 Protocol
• VoIP Calculator
• Columbia.edu: Session Initiation Protocol (SIP)

Sources

• An Interview with Andy Melton of NOS Communications
• PC World: Avoid VoIP Gotchas by James A. Martin - June 2004
• PC World: Net phones evolve - Sept. 2004
• VoIP watch by Andy Abramson
• PC Magazine