asterisk users - Mar 2008 - DTMF problems while greeting is playing (Background())

Hi,
I have a Digium TE410p T1 card and I've noticed that under asterisk
1.4.17/18 I have problems detecting DTMF in IVRs. I think I've
narrowed the problem down to some sort of interference between the
greeting that is playing and the DTMF tones. DTMF detection seems to
work very reliably when I am in Read() or WaitExten(), but is
absolutely unusable while in Background().

I hope someone has some ideas for a workaround or solution to this
problem. Having users wait until the end of a greeting to make a menu
selection is pretty much unacceptable.

Thank you.

-- James

Hi James;

Before putting my comments, first of all I would like
to ask u something that might also help: how can u use
the Read() or the WaitExten() instead of the
Background?

I seem to be having similar problems at one of my branch offices.  See 
my message on Intermittent DTMF issues for some of the standard 
replies.  Have you tried the RelaxDTMF tag in zapata.conf?  I don't 
think Gain calibration applies to T1 cards or I would recommend that as 
well.

Thanks,
Brent

James Lamanna wrote:
> Hi,
> I have a Digium TE410p T1 card and I've noticed that under asterisk
> 1.4.17/18 I have problems detecting DTMF in IVRs. I think I've
> narrowed the problem down to some sort of interference between the
> greeting that is playing and the DTMF tones. DTMF detection seems to
> work very reliably when I am in Read() or WaitExten(), but is
> absolutely unusable while in Background().
>
> I hope someone has some ideas for a workaround or solution to this
> problem. Having users wait until the end of a greeting to make a menu
> selection is pretty much unacceptable.
>
> Thank you.
>
> -- James
>
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Hi Eric;

I decreased the gain (although I was need to increase
it) and the problem somehow resolved partially (much
more better), but now I have a problem in the voice
volume, it is weak. If I increased the volume, then
the duplicatin in the DTMF for the first entered digit
(specifically) will appear.

Any help how can we resolve this?
Regards
Bilal


---------------------
Another note, after looking at the source code, it
seems as though
WaitExten() and Read() use ast_waitfordigit() where
Background uses
ast_waitstream().

Apparently these 2 functions must behave differently.

-- James

On Wed, Mar 12, 2008 at 9:45 AM, James Lamanna
<jlamanna at gmail.com>
 wrote:
> Hi everyone.
>  I've tried RelaxDTMF and it didn't seem to help.
>
>  I can't use Read() or WaitExten() instead of
background.
>  What I was doing was running a test using the
following dialplan:
>  [custom-testdtmf2]
>  exten => s,1,Answer
>  exten => s,n,AGI(festival-script.pl|Enter test
digits. Then press
 pound.)
>  exten => s,n,Read(mydigit||0)
>  exten => s,n,SayDigits(${mydigit})
>  exten => s,n,Gotoif($["foo${mydigit}" = "foo"]?6:3)
>  exten => s,n,Playback(vm-goodbye)
>  exten => s,n,Hangup
>
>  When I dialed in and pressed some digits, all the
digits were read
>  back to me with no issues.
>  So it seems that the greeting in Background() is
interfering with
 the
>  DTMF detection.
>
>  -- James
>
>
>
>  On Wed, Mar 12, 2008 at 7:47 AM, bilal ghayyad
<bilmar_gh at yahoo.com>
 wrote:
>  > Hi James;
>  >
>  >  Before putting my comments, first of all I would
like
>  >  to ask u something that might also help: how can
u use
>  >  the Read() or the WaitExten() instead of the
>  >  Background?
>  >
>  >  From the other side:
>  >
>  >  I got one email from eric asked me to Lower the
rxgain
>  >  and txgain on your Zap channels. But actually it
is
>  >  already the voice volume is low and I was
looking to
>  >  increase the gain (currently it is 0.0), so I do
not
>  >  know if eric was mean to reduce it less than
0.0, but
>  >  I can not do that due to the low volume that is
>  >  already existed, so any more reduce will make
the
>  >  voice not hearable well, even if the DTMF
problem
>  >  resolved.
>  >
>  >  I can share u one thing, the main problem in the
>  >  Background is the duplication in the first digit
>  >  detection, so for example if I entered 150, it
will
>  >  detect it 115 (and will not continue to detect
the 0
>  >  as the digit length completed).
>  >
>  >  Any advise?
>  >
>  >  Regards
>  >  Bilal
>  >
>  >  ------------
>  >
>  >
>  >
>  >  Hi,
>  >  I have a Digium TE410p T1 card and I've noticed
that
>  >  under asterisk
>  >  1.4.17/18 I have problems detecting DTMF in
IVRs. I
>  >  think I've
>  >  narrowed the problem down to some sort of
interference
>  >  between the
>  >  greeting that is playing and the DTMF tones.
DTMF
>  >  detection seems to
>  >  work very reliably when I am in Read() or
WaitExten(),
>  >  but is
>  >  absolutely unusable while in Background().
>  >
>  >  I hope someone has some ideas for a workaround
or
>  >  solution to this
>  >  problem. Having users wait until the end of a
greeting
>  >  to make a menu
>  >  selection is pretty much unacceptable.
>  >
>  >  Thank you.
>  >
>  >  -- James
>  >  -----------
>  >
>  >  Lower the rxgain and txgain on your Zap
channels.
>  >
>  >  bilal ghayyad wrote:
>  >  > Hi Brent;
>  >  >
>  >  > I have been suffering from this problem since
about
>  >  2
>  >  > monthes and until now still did not resolved
100%.
>  >  >
>  >  > First of all, I need to tell u that mostly u
have a
>  >  > problem that the first digit is duplicated,
for
>  >  > example: if ur customer entered 108 then it
will be
>  >  > recognized 110 (the 1 duplicated, and then it
takes
>  >  > the 0, and it does not continue to take the 8
as it
>  >  > completes the 3 digits ... this is just an
example).
>  >  >
>  >  > Your problem is in the duplication for the
digit and
>  >  > specifically the first digit usually will be
>  >  > duplicated.
>  >  >
>  >  > If u found a solution let me know.
>  >  >
>  >  > Regards
>  >  > Bilal

     
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