VoIP Mailing List Archives

[jlamanna at gmail.com]

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

[bilmar_gh at yahoo.com]

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?

[jlamanna at gmail.com]

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:

[jlamanna at gmail.com]

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:

[bilmar_gh at yahoo.com]

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:

[jlamanna at gmail.com]

Actually, relaxDTMF helped me.
I realized I was putting it in the wrong location in the zapata.conf
to get it to apply to my channels.
'zap show channel #' will tell if you if RelaxDTMF is enabled on a channel.

-- James

On Fri, Mar 14, 2008 at 10:55 AM, bilal ghayyad <bilmar_gh at yahoo.com> wrote:

[bilmar_gh at yahoo.com]

zap show channel 3 is giving me that I am using
relaxdtmf (actually I placed the relaxdtmf before the
assiging for the channel -> 3).

I increased the volume rxgain and txgain and now the
voice is hearable good, but still the detection for
the dtmf has duplication.

But, if I let the voice message completed and then I
entered the digits, it takes it some how better (look
like no duplication, did not notice till now).

Can anyone help me in explaining why no duplicatin in
the dtmf detection happens if I let the voice message
completed, and the duplication happens if I let the
voice message not completed?

In the end, I beleive there should be a solution for
this problem, it is very very important to avoid the
duplication in the digit detection.

Any advise?
Regards
Bilal
--- James Lamanna <jlamanna at gmail.com> wrote: