EMC

摘要

As mentioned in Feb 2008 EMC, a major Internet service provider is marketing an Internet Protocol TV (IPTV) service that is delivered via computer networks and a broadband Internet connection instead of using conventional TV broadcasting or cable TV distribution. This service is called BT Vision. A typical BT Vision installation includes a BT Home Hub and a BT Vision V-box. In some installations, these devices are located in different rooms. Although it would be possible for the two boxes to communicate via a wired Ethernet network cable or a 2.4GHz wireless network, BT is supplying home powerline networking devices to some BT Vision customers, about 250,000 according to some reports. This almost certainly makes BT the largest supplier of such devices in the UK. In autumn 2007, the RSGB President wrote to the Director of Technology Strategy and Development at BT Vision expressing the Society's concerns about this matter.