On  2 Dec 98 at 12:52, Jim Meagher wrote:

> At your house, the modem is connected to an analog (read that as
> voice grade) telephone connection.  At some point, the phone
> company will convert that analog signal into a digital signal
> (usually the main trunk line).  And -ideally- will convert the
> signal back to an analog circuit just before it enters your ISP's
> building.  With this perfect scenario, you should be able to
> achieve near 56K speeds.

  I think one of the stated requirements for 56K is that there NOT be
a D-to-A conversion at the ISP's end.  They have to bring a digital
T1 or PRI (BRI?) [or better] into a CSU/DSU rather than a bunch of
analog lines into modems.
  Even then, it's only the connection from the ISP back to you that
should be able to get near 56K[*].  Traffic from your PC to the ISP
still only goes at 33.6K.

[*] Currently limited to 53K by FCC regulations.  I actually see
44-46K where I live -- not what I'd like, but better than 33.6 for
downloads and surfing.

David G

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