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Date: | Thu, 3 Dec 1998 14:10:10 -0800 |
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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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