Re: [Asterisk-Users] T100P frame slips

2004-12-23 Thread Steve Underwood
Michael Welter wrote:
I posted last week that taking timing from either the T100P or the 
Adtran TA750 had no effect--that my fax transmissions crashed either 
way.  It turns out that the T100P card is bad and delivers random 
slips during a fax transmission--sometimes after several pages 
printed. Replacing the card solved the problem.  BTW, the slip is not 
audible on a butt set.

  What a waste of time.
This point is interesting. On most systems, if you cannot here regular 
ticks its pretty certain there are no slips. With the Digium cards, for 
some reason, many people have slips (usually due to configuration issues 
rather than faulty cards) yet were unaware of this until they have 
trouble with my spandsp software.

Regards,
Steve
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Re: [Asterisk-Users] T100P frame slips

2004-12-23 Thread Andrew Kohlsmith
On December 23, 2004 08:29 pm, Steve Underwood wrote:
> This point is interesting. On most systems, if you cannot here regular
> ticks its pretty certain there are no slips. With the Digium cards, for
> some reason, many people have slips (usually due to configuration issues
> rather than faulty cards) yet were unaware of this until they have
> trouble with my spandsp software.

That is weird.

I am receiving faxes with no issues at all now using spandsp and app_rxfax, 
however passing the same audio stream on to a real fax machine (Canon IR3300 
and/or some manner of ancient laser fax which does support > 9600 baud) 
causes bad receives.  This is on a TDM430P, and was tested in a Xeon 2.8 
Supermicro motherboard and also on a rinky-dink old P3-800 (app_rxfax works 
just great on the latter and is in fact what we're using).

Want to know the kicker?  sending faxes out from either of those fax machines 
mentioned above through the exact same TDM430P... no issues at all.  Just 
receiving.

A T100P + Adit600 channel bank had no problems with those same faxes with the 
same SuperMicro server.

-A.
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Re: [Asterisk-Users] T100P frame slips

2004-12-23 Thread James Sizemore
Try commenting out
;echocancel=yes
;echotraining=yes
I bet your faxs start working in both directions. But of course you will 
now have
occasional echo problems.


Andrew Kohlsmith wrote:
On December 23, 2004 08:29 pm, Steve Underwood wrote:
 

This point is interesting. On most systems, if you cannot here regular
ticks its pretty certain there are no slips. With the Digium cards, for
some reason, many people have slips (usually due to configuration issues
rather than faulty cards) yet were unaware of this until they have
trouble with my spandsp software.
   

That is weird.
I am receiving faxes with no issues at all now using spandsp and app_rxfax, 
however passing the same audio stream on to a real fax machine (Canon IR3300 
and/or some manner of ancient laser fax which does support > 9600 baud) 
causes bad receives.  This is on a TDM430P, and was tested in a Xeon 2.8 
Supermicro motherboard and also on a rinky-dink old P3-800 (app_rxfax works 
just great on the latter and is in fact what we're using).

Want to know the kicker?  sending faxes out from either of those fax machines 
mentioned above through the exact same TDM430P... no issues at all.  Just 
receiving.

A T100P + Adit600 channel bank had no problems with those same faxes with the 
same SuperMicro server.

-A.
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Re: [Asterisk-Users] T100P frame slips

2004-12-23 Thread Andrew Kohlsmith
On December 23, 2004 10:37 pm, James Sizemore wrote:
> Try commenting out
> ;echocancel=yes
> ;echotraining=yes
> I bet your faxs start working in both directions. But of course you will
> now have
> occasional echo problems.

echocancel=no

It's always disabled by * when it hears the fax tones anyway.

-A.
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Re: [Asterisk-Users] T100P frame slips

2004-12-24 Thread Patrick
On Thu, 2004-12-23 at 22:48 -0500, Andrew Kohlsmith wrote:
> On December 23, 2004 10:37 pm, James Sizemore wrote:
> > Try commenting out
> > ;echocancel=yes
> > ;echotraining=yes
> > I bet your faxs start working in both directions. But of course you will
> > now have
> > occasional echo problems.
> 
> echocancel=no
> 
> It's always disabled by * when it hears the fax tones anyway.

I read somewhere that to be able to hear the fax tones you need to give
Asterisk 1 or 2 seconds to be able to pick them up. So put a Wait(1) or
Wait(2) in your dialplan (directly after Answer would make sense to me)
so Asterisk can figure out it's a fax call and throw it to the fax
extension.

Merry Xmas!

Regards,
Patrick



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Re: [Asterisk-Users] T100P frame slips

2004-12-24 Thread Andrew Kohlsmith
On December 24, 2004 08:48 am, Patrick wrote:
> I read somewhere that to be able to hear the fax tones you need to give
> Asterisk 1 or 2 seconds to be able to pick them up. So put a Wait(1) or
> Wait(2) in your dialplan (directly after Answer would make sense to me)
> so Asterisk can figure out it's a fax call and throw it to the fax
> extension.

While this is true, it doesn't apply to my particular case -- I have a DID 
specific to faxes which is thrown to my "faxsterisk" box over IAX.

Basically

PRI -> colo* < dedicated IAX2 link > faxsterisk -> TDM430P -> faxmachines

faxmachines -> world = good faxes
world -> faxmachines = 50+% failure rate
world -> rx_fax on faxsterisk = good faxes

-A.
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