Digital subscriber line

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A digital subscriber line (DSL) connection is a high-speed dedicated digital circuit from a given location to the telephone company's central office, using normal copper telephone lines. DSL is the main form of consumer broadband worldwide. DSL is a general term that includes several variations:

  • ADSL - Asymmetric Digital Subscriber Line, ranging up to 1.5 Mbps
  • HDSL - High-bit-rate Digital Subscriber Line, 1.5 Mbps
  • SDSL - Single-line Digital Subscriber Line, 1.5 Mbps
  • VDSL - Very high-data-rate Digital Subscriber Line, ranging up to 2.3 Mbps
  • RDSL - Rate Adaptive Digital Subscriber Line, various speeds.
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