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Study: VoIP on the Rise--But TDM Still Rules: Page 2 of 2

That said, In-Stat is forecasting continued IP telephony growth in the coming years. By 2011, 33 percent of all companies are expected to use VoIP in some capacity, In-Stat said. Thirty-six percent of the companies that have deployed IP telephony are actually using products from multiple vendors.

The market research firm said smaller businesses are most drawn to broadband IP telephony products while IP PBXs appeal to large companies. About 14 percent of companies are using some form of voice-enabled IM.

In-Stat said it expects hosted IP telephony revenue to surpass that of broadband IP telephony (BBIPT) by 2010.

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