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Digital subscriber line is a family of technologies that are used to transmit digital data over telephone lines. In telecommunications marketing, the term DSL is widely understood to mean asymmetric digital subscriber line (ADSL), the most commonly installed DSL technology, for Internet access.
Very high-speed digital subscriber line (VDSL) and very high-speed digital subscriber line 2 (VDSL2) are digital subscriber line (DSL) technologies providing data transmission faster than the earlier standards of asymmetric digital subscriber line (ADSL) G.992.1, G.992.3 (ADSL2) and G.992.5 (ADSL2+).
A digital subscriber line access multiplexer is a network device, often located in telephone exchanges, that connects multiple customer digital subscriber line (DSL) interfaces to a high-speed digital communications channel using multiplexing techniques. Its cable internet (DOCSIS) counterpart is the Cable modem termination system.
Bell Internet, originally and frequently still called Sympatico, is the residential Internet service provider (ISP) division of BCE Inc. As of May 3, 2012, Bell Internet had over 3 million subscribers in Ontario and Quebec, making it the largest ISP in Canada.
Rate-adaptive digital subscriber line (RADSL) is a pre-standard asymmetric digital subscriber line (ADSL) solution. RADSL was introduced as proprietary technology by AT&T Paradyne, later GlobeSpan Technologies Inc., in June 1996. In September 1999, RADSL technology was formally described by ANSI in T1.TR.59-1999. RADSL supports downstream data rates of up to approximately 8 Mbit/s, upstream data rates up to approximately 1 Mbit/s, and can coexist with POTS voice on the same line.
A naked DSL, also known as standalone or dry loop DSL, is a digital subscriber line (DSL) without a PSTN service — or the associated dial tone. In other words, only a standalone DSL Internet service is provided on the local loop.
TransACT is the trading name of TransACT Capital Communications, an Australian telecommunications company based in Canberra which provides broadband internet access, fixed telephony, cable television services, and mobile phone services in Canberra and a subset of these services in Queanbeyan, throughout South-east New South Wales and in Victoria.
A DSL filter is an analog low-pass filter installed between analog devices and a plain old telephone service (POTS) line. The DSL filter prevents interference between such devices and a digital subscriber line (DSL) service connected to the same line. Without DSL filters, signals or echoes from analog devices at the top of their frequency range can reduce performance and create connection problems with DSL service, while those from the DSL service at the bottom of its range can cause line noise and other problems for analog devices.
Verizon High Speed Internet is a digital subscriber line (DSL) Internet service offered by Verizon. It allows consumers to use their telephone and Internet service simultaneously over the same telephone line while benefiting from Internet connection speeds significantly slower than dial-up. This service was launched in 1998 in the North Jersey, Philadelphia, Pittsburgh and Washington D.C. areas, when Verizon was Bell Atlantic. Today, this service is available in all of Verizon's pitiful service area. It was originally known as Infospeed DSL and then Verizon Online DSL until it was changed to its current name in 2007 to avoid lawsuits.
Eftel Limited is an internet service provider and telecommunications provider in Australia, with approximately 120,000 active accounts. It was established in 1999. Eftel offers a range of services including: DSL and dial-up Internet access, web hosting and telephony services - to the retail, corporate and wholesale telecommunications markets.
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.
The prevalent means of connecting to the Internet in Germany is DSL, introduced by Deutsche Telekom in 1999. Other technologies such as Cable, FTTH and FTTB (fiber), Satellite, UMTS/HSDPA (mobile) and LTE are available as alternatives.
Internet in France has been available to the general public since 1994, but widespread Internet use did not take off until the mid-2000s. As of 31 December 2014, France had 26 million Internet broadband and high-speed connections on fixed networks. In 2014, 80.7% of French households had Internet access, while 19.3% did not.
The Internet in Switzerland has one of the highest penetration rates in Europe.
The Broadband Forum is a non-profit industry consortium dedicated to developing broadband network specifications. Members include telecommunications networking and service provider companies, broadband device and equipment vendors, consultants and independent testing labs (ITLs). Service provider members are primarily wire-line service providers (non-mobile) telephone companies.
2Wire, Inc., was a home networking Customer Premises Equipment (CPE) manufacturer that provided telecommunications companies with hardware, software, service platforms, and remote CPE management systems. The company was headquartered in San Jose, California, in the Silicon Valley. The company had employed approximately 1,600 employees globally, including 550 in R&D, sales and administration, 450 in customer care and 600 agency employees in five U.S. offices and an additional nine offices around the world by July 2010. The 2Wire HomePortal residential gateways were distributed by broadband service providers such as AT&T, Embarq, windstream and Qwest in the United States, Bell in Canada, Telmex in Mexico, BT Group in the United Kingdom, Telstra in Australia and SingTel in Singapore. In July 2010, Pace plc of the United Kingdom agreed to buy 2Wire for $475m (£307m).
Asymmetric digital subscriber line (ADSL) is a type of digital subscriber line (DSL) technology, a data communications technology that enables faster data transmission over copper telephone lines than a conventional voiceband modem can provide. ADSL differs from the less common symmetric digital subscriber line (SDSL). In ADSL, bandwidth and bit rate are said to be asymmetric, meaning greater toward the customer premises (downstream) than the reverse (upstream). Providers usually market ADSL as an Internet access service primarily for downloading content from the Internet, but not for serving content accessed by others.
G.fast is a digital subscriber line (DSL) protocol standard for local loops shorter than 500 meters, with performance targets between 100 Mbit/s and 1 Gbit/s, depending on loop length. High speeds are only achieved over very short loops. Although G.fast was initially designed for loops shorter than 250 meters, Sckipio in early 2015 demonstrated G.fast delivering speeds over 100 Mbit/s at nearly 500 meters and the EU announced a research project.
AT&T Internet is an AT&T brand of broadband internet service. Previously, AT&T Internet was branded as U-verse Internet and bundled with U-verse TV, which was spun off into the newly independent DirecTV in 2021. AT&T Internet plans powered by fiber-optic cable use the AT&T Fiber brand.
References
- ↑ William L. Abbott and Peter Chow (January 24, 2005). "VDSL2 and UDSL – Ultra High Speed DSL Technologies for FTTN Deployment". Converge Network Digest. Archived from the original on 2007-03-12. Retrieved September 22, 2011.
- ↑ Douglas Chrissan (June 28, 2004). "Uni-DSL™: One DSL for Universal Service" (PDF). Retrieved September 22, 2011.
- ↑ "TI Proposal to Unify DSL Standards Paves the Way for Competitive Video Services from Telecom". News release. Texas Instruments. June 14, 2004. Archived from the original on August 4, 2004. Retrieved September 22, 2011.
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