From the archives: An in-depth look at VoIP, specifically its past.
By Gilad Shaham
Update: We're in the last throes of winter break 2019, which means most Ars' home office phones can stay dormant for a few more days. As such, we've been resurfacing a few classics from the archives - the latest being this look at how SIP (Session Initiation Protocol) won the VoIP protocol wars once upon a time. This story first appeared on December 8, 2009, and it appears unchanged below.