To: Stephen B. Temple who wrote (1988 ) 12/1/1998 8:08:00 AM From: Stephen B. Temple Respond to of 3178
"While IP voice over cable has been shown before, the combination of voice and data capabilities in a single cable modem is a significant advance" Voice over IP adds spice to cable modem services" December 1, 1998 Network World: Anaheim, Calif. Cable modem service providers may soon have a new weapon to use in their fight against digital subscriber line (DSL) service provide rs: voice over IP. At the Western Cable Show here this week, Motorola will demonstrate a prototype cable modem that can also handle IP voice. The company expects the box, known as an integrated multimedia terminal adapter (MTA), to be in full production by mid-1999. With it, cable providers can be expected to offer voice and data services to homes over the same coaxial cable that delivers TV service. "It's a great telecommuter answer. Many corporations are talking about doing voice over IP internally, and this could extend that out to the telecommuter," says Jeff Wilson, director of access programs at Infonetics Research in San Jose, Calif. While IP voice over cable has been shown before, the combination of voice and data capabilities in a single cable modem is a significant advance, according to Jim Wahl, an analyst with The Yankee Group in Boston. Until now, to put voice and data on the cable network required a modem and a separate voice gateway, which Infonetics' Wilson says is a more complex and expensive approach. DSL uses over traditional phone lines to deliver a voice channel and a high-bandwidth datastream, and strides are being made to ensure the interoperability of DSL modems (see story, page 30). Motorola's MTA prototype has a telephone port and a four-port Ethernet hub built into it. Data speeds on the cable can be as high as 10M bit/sec depending on how many other customers are using the same shared cable subnet to exchange information. The integrated MT A uses proprietary methods for ensuring there is enough bandwidth to prevent voice packets from getting delayed. Motorola is still trying to slim down the design of the integrated MTA to cut costs, so pricing has not been set for the production model, according to Jeff Walker, director of marketing for Motorola's cable data products. But even without the integrated MTA, Time Warner Cable in San Diego last week started testing an IP voice and data service designed for telecommuters. Time Warner is using a separate Motorola MTA in conjunction with a stand-alone cable modem to support the service . Testing it out Qualcomm, the wireless communications hardware maker, is the test customer, buying the service for 10 of its work-at-home employees. The company is interested in voice over IP generally as a way to save money over traditional circuit-switched local and long-distan ce voice service. Qualcomm is also looking for an alternative to ISDN for its telelcommuters, according to Corey Hale, a network eng ineer for the company. ISDN can cost more than $300 per month in California, depending on use. " It comes down to money. If we weren't worried about money, we'd stick with ISDN," he says. To make phone calls, a remote user dials the desired number, and the call is converted to IP packets that are sent over the cable ne twork to Qualcomm's headquarters. There the packets are converted back to voice signals that run through the corporate PBX to the pu blic telephone network. Time Warner is offering the service for its standard data-only cable modem service fee of $40 per month. When voice and data become regular services, the price will increase to $75 to $100 per month, according to Richard Kirby, sales manager for business services at Time Warner Cable. <<Network World -- 11-30-98, p. 10>>