2009 should be the year the installed base of IP-based virtual private networks surpasses the installed base of frame relay and asynchronous transfer mode sites, Vertical Systems Group forecasts suggest.The shift has been going on for years, but a crossover point would be significant, as it will be when the installed base of IP phone systems surpasses that of digital systems.
Adoption of the ascendant technology gets a boost when vendors begin to slow and end development of legacy applications and gear.
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