IP has become the technology of choice for enterprises, with firms ditching traditional circuit-switched PBXs in favour of IP-based packet-switched devices at an unprecedented rate.
According to a newly published Dell'Oro Group report, sales of IP PBX and hybrid IP/TDM PBXs are forecasted to reach $6.1bn in 2009, representing an 11 per cent compound annual growth rate.
The analyst group said that IP PBXs and hybrid IP/TDM PBXs, which represented only half of the lines shipped in 2004, will comprise almost 88 per cent of lines shipped by 2009, taking share from traditional TDM systems.
"Hybrid IP/TDM PBXs are currently the most popular since they allow businesses to take advantage of IP telephony capabilities while preserving existing investments in TDM-based lines and digital telephones," said Steve Raab, director of IP telephony research at Dell'Oro Group.
"While we forecast that hybrid IP/TDM PBXs will represent a majority of sales over the next five years, sales of pure IP PBXs will achieve the highest growth rates."
According to the analyst's five-year forecast, the transition to voice over IP on the business desktop is preceding more slowly, with traditional circuit switched line shipments leading IP lines sold to support IP phones until 2009.
The adoption of IP phones is being slowed since businesses must upgrade existing local area networks to add capabilities such as Power over Ethernet in order to use VoIP.
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