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The civil telecomms monopoly ended when Mercury Communications arrived in 1983. The Post Office system evolved into British Telecom and was privatised in 1984. Broadcast transmitters, which belonged to the BBC and IBA, were privatised during the 1990s and now belong to National Grid Wireless , VT Communications and Arqiva . Regulation of communications has changed many times during the same period, and most of the bodies have been merged into Ofcom , the independent regulator and competition authority for the UK communications industries {Link without Title} . INFRASTRUCTURE Domestic Trunk Infrastructure All communications Trunks are now Digital . Most are carried via national Optical Fibre networks. There are several companies with national fibre networks, including BT , NTL , Cable & Wireless , Easynet and Thus . Microwave links are used up to the 155 Mbit/s level, but are seldom cost-effective at higher Bit Rate s. International Trunks The UK is a focal point for many of the world's Submarine Communications Cable s, which are now mostly digital optical fibre cables. There are many satellite links too, but these now provide a relatively small part of the international bandwidth. Broadcast Transmission Most broadcasting organisations, BBC and commercial, lease transmission facilities from one or more of the transmission companies. The main exception is the smaller local radio stations, some of which find it more cost-effective to provide their own. Fixed Phone Lines BT is still the main provider of fixed telephones lines, both POTS and ISDN, and it has a universal service obligation. NTL is the second biggest player in the residential telephone line market. Other companies provide fixed telephone lines too, but mainly to large companies in the major cities. There are many other providers who sell fixed telephone services carried over BT lines. They have no network infrastructure of their own. Mobile Phone Networks First and Second Generation Networks
Third Generation Networks The four 2G companies all won 3G licences in a competitive auction, as did a new entrant known as 3 . They have now rolled out their networks. The 3rd generation stems from technological improvements and is in essence an improvement of the available bandwidth, enabling new services to be provided to customers. Such services include streaming of live radio or video, video calls and live TV. A new technology was announced and demonstrated at 3GSM in Cannes by Nortel in association with Orange in 2005: HSDPA ( High Speed Downlink Packet Access ), potentially enabling bandwidth of up to 8 Mbit/s in the future. SERVICES Telephones Fixed Telephones In the United Kingdom , there are 35 million ( 2002 ) main line telephones. The telephone service in the , Yorkshire and Guernsey had been bought out by the Post Office . Post Office Telephones also operated telephone services in Jersey and the Isle Of Man until 1969 when the islands took over responsibility for their own postal and telephone services. Post Office Telephones was reorganised in '', or ''BT''), and was the first nationalised industry to be privatised by the Conservative government. The Hull Telephone Department was itself sold by Hull City Council as '' Kingston Communications '' in the late 1990s and celebrated its centenary in 2004 . Mobile Telephones As of January 2005, there are now more Mobile Phone s than people - over 55 million - in the UK. However, this does not compare with Luxembourg , which has achieved 133% market penetration. {Link without Title} Each of the five network operators (see Infrastructure above) sells mobile phone services to the public. In addition, Virgin Mobile sells a service using network capacity bought from T-Mobile. Numbering ''Main article: UK Telephone Numbering Plan '' There is a set numbering plan for phone numbers within the United Kingdom, which is regulated by the Office of Communications ( Ofcom ), which replaced the Office of Telecommunications ( Oftel ) in 2003 . Each number consists of an area code - one for each of the large cities and their surroundings - and a subscriber number - the individual number. Television and Radio Broadcasting Radio ''Main article: Radio In The United Kingdom '' As of , 431 on FM and 3 on shortwave. There are 84.5 million radio receiver sets ( 1997 ). Television ''Main article: British Television '' As of 1997 , there are 30.5 million television sets. There are five main free-to-air analogue networks - BBC One , BBC Two , ITV , Channel 4 and Five . Other networks are the Satellite Television provider BSkyB , Cable Television companies NTL and Telewest , and Digital Terrestrial Television company Freeview . Internet At the end of also provide access to the internet, sometimes for a fee. As of 1999 , there are 364 Internet Service Provider s (ISPs). The Country Code Top-level Domain for United Kingdom web pages is '' .uk ''. Nominet UK is the .uk Network Information Centre and second-level domains must be used. SEE ALSO
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