SIP trunking will grow at 89 percent cumulative average growth rate between now and 2013 says Diane Myers, Infonetics directing analyst.
The converse is that we might finally be seeing the peaking of T1 services as the mainstay of business bandwidth. To be sure, SIP trunks are a replacement for channelized T1s used to support voice termination and origination operations. But even on the Internet access front, midband Ethernet services now are approaching price points that make them reasonable substitutes for data T1s, in some markets.
In 2008 the VoIP services market grew 33 percent to $30.8 billion. For the first three months of 2009, hosted IP service providers experienced an average of 40 percent to 50 percent year-over-year growth, says Myers.
"We expect hosted unified communications services to take off, with worldwide revenue doubling between 2009 and 2013," she says.
While residential VoIP services make up the bulk of VoIP service revenue, business VoIP service revenue growth outpaced residential in 2008, she says.
In 2008, managed IP PBX and hosted IP Centrex/hosted UC revenue together accounted for nearly three quarters of all business VoIP service revenue while IP connectivity service revenue made up the balance.