Voice over Internet protocol (VoIP) is a truly disruptive technology, allowing cable operators to gain a share of what has traditionally been the bread and butter of the Baby Bells -- landline voice. Vonage was the largest VoIP provider in the U.S. at the end of 2006, but this is unlikely to last. Comcast and Time Warner are growing their VoIP subscriber bases very quickly and will surpass Vonage in 2007. eMarketer estimates that the number of U.S. VoIP subscribers will rise from 9.8 million at the end of 2006 to 41.3 million by the end of 2011. VoIP subscribers will account for over one-third of all U.S. landline subscriptions in 2010, up from 10% in 2006.
Published in Brief: