Ascend Archive
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Re: (ASCEND) Am I the only one ??
> At 12:06 1998/09/28 -0400, Phillip Vandry wrote:
> >The loop is part analog, and the conversion cannot be perfect, so of
> >course your're going to lose some in the conversion. As far as I know,
> >no one's about to connect 56K (or 53K or 54K or whatever the top
> >speed is) if they're connecting to an ISP with CT1's which have only
> >56K channels. Only if the ISP has 64K lines (ISDN) can you expect to
> >reach such speeds.
>
> I'll grant you that I don't know all the intimate details of
> how the line cards in any particular switch work, but I don't
> think that you can drive the transmitters higher than
> the raw 56k provided over a CSV channel (Circuit-Switched-Voice),
> so it shouldn't matter whether the line is ISDN or CT1,
> a CSV is a CSV is a CSV...
For some reason I was thinking that a voice call would be modulated over
the full 64K channel whenever such was available end to end, but upon
thinking about it, I guess that would require a different codec and
they probably wouldn't have bothered.
So you're probably right.
-Phil
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