🚀 go-pugleaf

Paul Womar <{$PW$}@pwomar.demon.co.uk> wrote:

> Rebecca and Rowland <real-address-in-sig@flur.bltigibbet> wrote:
> 
> > Paul Womar <{$PW$}@pwomar.demon.co.uk> wrote:
> > 
> > > Rebecca and Rowland <real-address-in-sig@flur.bltigibbet> wrote:
> > > 
> > > > Bruce Horrocks <bh@granby.demon.co.uk> wrote:
> > > > 
> > > > [snip]
> > > > > Nearly, but not quite in that although the maximum speed might be the
> > > > > same, the latency of a TA will be slightly higher.
> > > > 
> > > > Why?
> > > 
> > > I guess you've got a bit of more digital jiggery pokery (technical term)
> > > going on, your mac converts the data to a serial stream, the TA converts
> > > it to ISDNish and sends it, if it's a PCI card you have a card on the
> > > PCI bus that just converts it to ISDNish,
> > 
> > Hmm...  But ISDN *is* a serial data stream, isn't it?
> 
> I guess it would have to be of sorts but you probably have to convert
> between the types of encoding.

Well, yes, but part of the encoding is just stuff like voltage levels
and slew rates, all handled by the driver hardware.  I assume you have
to attach header-like entities to ISDN data, but again, that's pretty
trivial.  If a PCI card can do it in trivial time, so can anything else.

> > > I know that proably doesn't
> > > explain a thing but I've seen it reported several times.
> > 
> > It's not that I'm doubting the fact that it happens; I just can't see
> > any reason for it.
> 
> I've left the quotes in and added uk.telecom to the newsgroups, I'm sure
> someone there knows, something similar was discussed there or in
> demon.tech.modems recently but it wasn't too clear for me.

Now why didn't I think of that?

Rowland.

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