VOIP stats

IDC:

“The overall market is projected to increase at a compound annual growth rate of 45% to reach a revenue base of $15.1 billion by the year 2007,” noted Tom Valovic, director of IDC’s IP Telephony program. IDC is projecting the best growth in enterprise systems such as IP-PBXs. For this year, the current forecast shows a 66% increase in equipment sales to enterprises.

WORLDWIDE IP TELEPHONY EQUIPMENT REVENUE, 2001–2007 ($M)
  2001 2002 2003 2004 2005 2006 2007
Total 1846 2398 3336 4945 7592 11356 15142
Growth (%) NA 30% 39% 48% 54% 50% 33%