dsl services

DSL or xDSL, is a family of technologies that provide digital data transmission over the wires of a local telephone network. DSL originally stood for Digital Subscriber Loop, although in recent years, many have adopted Digital Subscriber Line as a more marketing-friendly term for the most popular version of DSL, ADSL over UNE.

Typically, the download speed of DSL ranges from 128 kilobits per second (kbit/s) to 24,000 kbit/s depending on DSL technology and service level implemented. Covad is a leader in business broadband offering high-speed internet and network access utilizing Digital Subscriber Line (DSL) technology as well as Voice over IP services. Upload speed is lower than download speed for Asymmetric Digital Subscriber Line (ADSL) and equal to download speed for Symmetric Digital Subscriber Line (SDSL).

History

Digital Subscriber Line technology was originally implemented as part of the ISDN specification.

ADSL technology dates back to 1988, when Joe Lechleider at Bellcore (now Telcordia Technologies) adapted DSL to carry a digital signal over the unused frequency spectrum available on the twisted pair cables running between the telephone company's central office and the customer premises. [1]

Telephone companies started promoting DSL when cable television companies began marketing broadband Internet access and VoIP telephony. Until this point, DSL service had primarily been provided over a dedicated "dry loop". Find low cost ISP providers at GetISPinfo.