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Grandstream has the same problem. Very common. A simple DTMF debouncer
curcuit will fix it.<br>
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Doug Meredith wrote:
<blockquote cite="mid14jb51140c7oeaca2qnskavhl99aqvqvtc@4ax.com"
type="cite">
<pre wrap="">Eric Wieling <a class="moz-txt-link-rfc2396E" href="mailto:eric@fnords.org"><eric@fnords.org></a> wrote:
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<pre wrap="">Daryll Strauss wrote:
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<pre wrap="">Yep, I've seen it and from reading <a class="moz-txt-link-freetext" href="http://www.voxilla.com">http://www.voxilla.com</a> it's a
pretty common problem.
If you turn on debugging what you'll see is that the Sipura has
mistakenly detected a DTMF code in the audio stream and is relaying it
by repeating the signal (very loudly I might add)
So this appears to be a bug in the most current firmware. I've
reported it to Sipura including the debug output. Maybe more people
should do the same.
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<pre wrap="">You'd think that switching to RFC2833 DTMF would fix that.
</pre>
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<pre wrap=""><!---->
That is actually the problem. It thinks it hears DTMF so it sends an
out-of band signal. The other end receives this and produces the
audible tone.
Switching to in-band fixes it. Well, works around it. :)
Doug
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