The inexorable move from circuit switching technology to packet switching technology for PBXs continues worldwide, according to a new survey by Infonetics Research. Infonetics' Enterprise Telephony report forecasts that IP PBX revenue will jump 82% between 2005 and 2009, while TDM revenue will plunge 88%.
The report also found that worldwide TDM system revenue fell 11% while IP PBX revenue inched up 1% between the fourth quarter of 2005 and the first quarter of 2006.
The combined worldwide revenue for TDM and IP PBX systems revenue is 15% higher than a year ago, according to the report, although it fell 2% to $2.1 billion in the first quarter of 2006.
The report also found that :
* Cisco leads the IP phone market, with 39% unit market share, followed by 3Com and NEC.
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