[geeks] Interconnect: Cell phone to house phone system

[Nick B]

FAX over cell works ok.
FAX over voip does (generally) not.  Nor does Fax interact well with
virtualization.
So clearly, our corporate IT department virtualized our FAX voip servers.
It worked *REALLY* well if you didn't want faxes.
Nick


On Wed, Sep 25, 2013 at 2:39 AM, Mouse <mouse at rodents-montreal.org> wrote:

> > I wonder if I can send a fax over one of these links? :)
>
> I once tried faxing over VoI.  It's not quite the same thing, but in
> some respects it's related enough that the experience is possibly
> relevant.
>
> I found that, over a perfect connection - in particular, no dropped
> packets - faxing works great.  But packet loss produces errors the
> usual POTS fax codecs are not designed to cope with, and they fail
> fairly spectacularly.  (They are designed to deal with the kinds of
> errors POTS typically introduces, which are very different from the
> kinds of errors VoI typically introduces.)
>
> I am not very up on this stuff, but I have heard people who know more
> than I do about it say that there exists a fax codec designed to deal
> with typical VoI errors instead.  If the fax devices in question are
> prepared to handle that, or if there are devices in the path adapting
> the one protocol to the other (I think some ATAs can do this), then you
> might well be OK.
>
> As I said, I realize VoI errors are not the same as cellular errors.
> But it seems moderately likely to me that the errors cellular causes
> may be more like VoI errors than POTS errors....
>
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