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Asymmetric digital subscriber line (ADSL) is a type of digital subscriber line (DSL) ... Distance from the telephone exchange, cable characteristics, ...
Digital subscriber line (DSL; originally digital subscriber loop) is a family of technologies that are used to transmit digital data over telephone lines. [1] 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 .
Multi-rate symmetric DSL (MSDSL or MDSL) is a proprietary, non-standardized symmetric digital subscriber line technology with a maximum distance of 29,000 feet (8,800 m). [1] It is capable of multiple transfer rates, as set by the Internet service provider, typically based on the service and/or price. Eight data rates are available, ranging ...
ISDN digital subscriber line (IDSL) is a cross between ISDN and xDSL. It is like ISDN in that it uses a single-wire pair to transmit full-duplex data at 128 kbit/s and at distances of up to RRD range [definition needed]. Like ISDN, IDSL uses a 2B1Q line code to enable transparent operation through the ISDN U interface.
ADSL repeaters are deployed by rural telephone companies trying to provide rural Internet service to farms and small towns where it is impractical to place the DSLAM closer to the subscriber. Typical distance improvements with a loop extender are shown in the diagram below, with rate in megabits per second and distance in thousands of feet. [1]
Siemens DSLAM SURPASS hiX 5625 Outdoor Huawei DSLAM fed by GPON lines. A digital subscriber line access multiplexer (DSLAM, often pronounced DEE-slam) 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. [1]
ITU-T G.992.3 Annex L is an optional specification in the ITU-T recommendation G.992.3 for ADSL2 titled Specific requirements for a Reach Extended ADSL2 (READSL2) system operating in the frequency band above POTS, therefore it is often referred to as Reach Extended ADSL2 or READSL2.
The second graph is of more importance since it is attenuation which is the governing factor for line speed because attenuation rate over distance can vary significantly between various copper lines due to their quality and other factors. ADSL2 is able to extend the reach of extremely long lines that have around 90 dB attenuation. Standard ADSL ...