USA and ADSL

  [DELETED] 14:31 15 Jan 2006
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Is ADSL in the USA known as DSL and are they the same?

  Forum Editor 14:58 15 Jan 2006

The A in ADSL means asymmetric DSL. This recognises that for home use people tend to be more consumers of data than producers, so a slower upstream (upload) speed can traded off for a faster downstream (download) speed. In addition, the ADSL standard allows for analogue phone calls to be squeezed into the low end of the frequency spectrum. ADSL therefore needs a microfilter to be inserted into the phone socket.

There are three basic forms of DSL, and they are:-

ADSL - as described above

SDSL - Upload and download speeds are equal

RADSL - Upload speed stays constant, but download speeds may increase and decrease, depending on Network traffic, numbers of people connected at the same time, etc.

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