Hi,<br><br>I am generating the tones from Asterisk, using senddtmf and option D in the Dial command.<br><br>Is there no way to change it? Can I somehow modify it in tonezone.c and recompile Asterisk?<br><br>--<br>Zeeshan A Zakaria<br>
<br><div class="gmail_quote">On Sat, Nov 21, 2009 at 8:56 AM, Tilghman Lesher <span dir="ltr"><<a href="mailto:tlesher@digium.com">tlesher@digium.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div><div></div><div class="h5">On Friday 20 November 2009 17:03:20 Zeeshan Zakaria wrote:<br>
> Hi,<br>
><br>
> I am having this issue that with one of the Asterisk servers, on zaptel<br>
> hardware, that DTMF tones are 10-30 Hz too high than the upper limit for<br>
> any DTMF digit frequency. This is causing problem with the equipment on the<br>
> other end which is trying to recognize the DTMF digits. I tried different<br>
> cards from the same vendor but it didn't help. For example for digit 1<br>
> where it should generate 697 Hz, it would generate 712 Hz, and where it<br>
> should generate 1209 Hz, it would generate 1230 Hz.<br>
><br>
> Talking to the hardware support, they said it is not dependent on the<br>
> hardware. I googled and found very little information, but apparently it<br>
> was an issue with ztcfg and zaptel, but it was fixed more than a year ago.<br>
><br>
> I found that in dsp.c file we could change the frequencies, but that is<br>
> only for the incoming DTMF.<br>
><br>
> Is there a way to change DTMF frequencies for the outgoing DTMF? If I could<br>
> drop all the frequencies by 15 Hz, that might solve the problem which I am<br>
> having.<br>
<br>
</div></div>It's hardcoded in tonezone.c. Another possibility is that your phones are<br>
generating tones that are out of whack with the standard, and Asterisk isn't<br>
detecting them as tones because they're so out of whack and they're simply<br>
getting passed, unchanged, onto the remote side, where they are similarly not<br>
being detected.<br>
<br>
--<br>
Tilghman Lesher<br>
Digium, Inc. | Senior Software Developer<br>
twitter: Corydon76 | IRC: Corydon76-dig (Freenode)<br>
Check us out at: <a href="http://www.digium.com" target="_blank">www.digium.com</a> & <a href="http://www.asterisk.org" target="_blank">www.asterisk.org</a><br>
<br>
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