SCOTTSDALE, AZ--(Marketwire - February 8, 2011) - Worldwide sales of IP phones picked up momentum in 2010, as the movement toward IP telephony systems continues. Within the business market, corded IP phones remain the standard, and will continue to dominate the enterprise IP phone market throughout the forecast period. New In-Stat (www.in-stat.com) research forecasts IP phone shipments, for business and consumer, will exceed 40 million units in 2015.