VoIP services are rapidly becoming the bread and butter of enterprise voice networks, as roughly 72% of all enterprise voice lines shipped by vendors in 2007 were IP-capable. Now that companies are definitively moving away from the traditional Time-Division Multiplexing (TDM) voice networks and into Session Initiation Protocol-based (SIP) VoIP networks, we examine the VoIP industry’s most pressing issues, including SIP interoperability, TDM-to-SIP transition services and VoIP security issues.

To read this Network World article in full, see www.networkworld.com/news/2008/073108-burning-voip.html.