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Integrated Services Digital Network (ISDN) is a set of communication standards for simultaneous digital transmission of voice, video, data, and other network services over the digitalised circuits of the public switched telephone network. Work on the standard began in 1980 at Bell Labs and was formally standardized in 1988 in the CCITT "Red Book". By the time the standard was released, newer networking systems with much greater speeds were available, and ISDN saw relatively little uptake in the wider market. One estimate suggests ISDN use peaked at a worldwide total of 25 million subscribers at a time when 1.3 billion analog lines were in use. ISDN has largely been replaced with digital subscriber line (DSL) systems of much higher performance.
The following is an outline of communications technology in Morocco.
Plusnet plc is a British triple play internet service provider (ISP) providing broadband, landline and mobile services. The company was founded in 1997 in Sheffield, England, and became a public limited company (plc) in July 2004 when it was floated on the Alternative Investment Market. On 30 January 2007, Plusnet was acquired by BT Group, but it continues to operate as a separate business. By December 2013, it had over 750,000 customers across the UK.
The 21st Century Network (21CN) programme is the data and voice network transformation project, under way since 2004, of the UK telecommunications company BT Group plc. It was intended to move BT's telephone network from the AXE/System X Public Switched Telephone Network (PSTN) to an Internet Protocol (IP) system. As well as switching over the PSTN, BT planned to deliver many additional services over their new data network, such as on-demand interactive TV services.
BT Broadband is a broadband service offered by BT Consumer; a division of BT Group in the United Kingdom. It was formerly known as BT Total Broadband, BT Yahoo! Broadband and BT Openworld. With the introduction of BT Infinity, the Broadband package now refers to the legacy ADSL broadband products, such as ADSL Max and ADSL2+.
BT Fusion was a telecommunications product available from BT Group in the United Kingdom until 1 April 2009 when it was withdrawn. It "fused" together mobile telephony and, from the user's point of view, conventional landline telephony. In fact, the fixed portion of the link was provided by a Voice over IP implementation using the domestic ADSL service. The BT Fusion service was compatible with the BT Smart Hub.
The BT Versatility is a telephone PBX switchboard sold by BT and targeted at small businesses. It is manufactured by Taratel Communications previously Lake Communications in Ireland as the OfficeLink. In South Africa it was sold by Tellumat as the Convergence 30 or C30, in Australia it was sold as the Commander Connect, in the USA it was sold by Inter-tel as the Encore CX and by Mitel as the Mitel 3000
UK Online was a consumer Internet service provider that operated within the UK, and began as a dial-up provider in 1994. Network provider Easynet acquired the company in 1996, and were in turn acquired by BSkyB in 2005. The service was closed down in January 2011.
Sky Broadband is the consumer internet service offered by Sky UK in the United Kingdom.
TalkTalk TV is a UK-based consumer television and video on demand service, operated by the TalkTalk Group. It originally launched in 2000. In September 2012, the current TalkTalk TV was launched in partnership with YouView. Its television and video on demand service is delivered over a BT phone line, using ADSL or VDSL. It provides IPTV, video on demand, telephony and broadband internet access.
The BT Smart Hub is a family of wireless residential gateway router modems distributed by BT for use with their own products and services and those of wholesale resellers but not with other Internet services. Since v 5 Home/Smart Hubs support the faster Wi-Fi 802.11ac standard, in addition to the 802.11b/g/n standards. All models of the Home Hub prior to Home Hub 3 support VoIP Internet telephony via BT's Broadband Talk service, and are compatible with DECT telephone handsets. Since the Home Hub 4, all models have been dual band.
BT Wholesale and Ventures was a division of United Kingdom telecommunications company BT Group that provided voice, broadband, data, hosted communication, managed network and IT services to communications providers (CPs) in Great Britain. It was merged with BT's Business and Public Sector division to form BT Enterprise in October 2018.
The United Kingdom has been involved with the Internet throughout its origins and development. The telecommunications infrastructure in the United Kingdom provides Internet access to homes and businesses mainly through fibre, cable, mobile and fixed wireless networks, with the UK's 140-year-old copper network, maintained by Openreach, set to be withdrawn by December 2025, although this has since been extended to 31st January 2027 in some areas due to reasons including panic alarms in sheltered housing needing a persistent connection which can't be guaranteed with internet-based DECT systems.
British telephone sockets were introduced in their current plug and socket form on 19 November 1981 by British Telecom to allow subscribers to connect their own telephones. The connectors are specified in British Standard BS 6312. Electrical characteristics of the telephone interface are specified by individual network operators, e.g. in British Telecom's SIN 351. Electrical characteristics required of British telephones used to be specified in BS 6305.
TalkTalk Telecom Group Limited is a British telecommunications company that provides pay television and Internet access services to businesses and consumers in the United Kingdom. It was founded in 2003 as a subsidiary of Carphone Warehouse and was demerged as a standalone company in March 2010. Its headquarters are in Salford.
BT Highway was a UK retail ISDN2e service from British Telecom which was announced in November 1997 and withdrawn in February 2007. In the domestic market, it was sold as BT Home Highway and for small businesses, BT Business Highway. These names were used simply to differentiate billing schemes; the hardware for both services used the name BT Highway. Unlike regular ISDN2e service where only a digital S interface is provided BT Highway provided both digital and analogue connections simplifying migration from regular POTS service.
Andrews & Arnold Ltd is an Internet service provider based in Bracknell, England. Launched in 1998, the company serves businesses and home users.
BT Redcare is the largest supplier of alarm signalling services for security and fire in the UK. It was established over thirty years ago, and works with both the business and domestic markets.
References
- ↑ "BT Voyager 2110". TechRadar. Retrieved 2018-08-20.
- ↑ "BT Voyager 2100 Wireless ADSL Router Review | thinkbroadband". www.thinkbroadband.com. Retrieved 2018-08-20.
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