[VoIP] More "Authentic" CNET

[ikjtel]

Yeah,  I was able to make (what I believed was) a
complete list of all variables in play including
product/model of hardware as well as version(s) of
software used by Lee, John, and Kirt.

I then set up a testbed here matching every piece
(except I used a genuine Digium T1 card and I used a
different brand of channel bank) and verified that all
software versions were the same.  Inasmuch as I was
unable to reproduce the problem here, the conclusion
was that all variables could therefore be eliminated
except two: the channel bank brand/model, and the
varion T1 card.  I then made a sort of informal (but
educated) guess that if I were betting I would choose
to wager that, of the two, the varion card was the
culprit.  Also, additional ammunition for this is the
fact that varion has some sketchy "modifications" in
that very area, having to do with "a" and "b" timing
bits or some such...

In any case, I don't feel that one isolated case of
bad hardware/software should dictate what kinds of
cool features we should or should not add to
CNET........

Max

--- Steph Kerman <stfkerman at jps.net> wrote:

> I recall that thread.  I don't recall seeing
> anything about a cause 
> having been determined.  As I remember it, the
> pulses were unevenly 
> timed, with pauses inserted into the pulse trains. 
> I don't see how the 
> channel bank could do anything other than shift the
> make/break ratio, 
> which was not how I understood the problem having
> been described, but I 
> never heard the sound of the aberrant outpulsing.
> 
> Perhaps compelled MF would work better than SF
> because the compelled 
> handshake would ensure correct digit transmission
> regardless of dropouts.
> 
> Steph
> 
> ikjtel wrote:
> > --- ikjtel <ikj1234i at yahoo.com> wrote:
> >> [snip] was able to dial shorter digits very
> sucessfully, and longer 
> >> ones OK sometimes, and not OK sometimes.
> > I was convinced at the time that the cause of the
> "bad" digits had 
> > nothing whatsoever to do with audio drop-outs or
> VOIP packet loss.
> >
> > At that time John and others (Lee?, Kirt?) were
> having problems which 
> > were well-discussed on the list (channel bank FXO
> erratic outpulsing 
> > errors). The problem was audible as you could
> actually hear the pulse 
> > train sounded incorrect. I believe the root cause
> of the problem may 
> > have been in the Varion T1 product somewhere...
> >
> > Max
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> 



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