[Freeswitch-users] inband DTMF bleeding through

[Michael Collins]

Are you using the spandsp dtmf detector by any chance? If not, try it. I
think it works a bit better. Look on the dialplan apps section of the wiki
for the spands_dtmf* commands.

-MC


On Wed, May 22, 2013 at 4:51 PM, Richard Zheng <rzheng at gmail.com> wrote:

> Any resolution on this one?  I have the same issue.  DTMF coming from a
> cell phone, say 123, is sometimes repeated, e.g. 11233 when forwarded to an
> outbound call.  It is not consistent though.
>
>
> On Fri, Mar 22, 2013 at 7:16 AM, Matt Broad <matt at inveroak.com> wrote:
>
>> Hi Trever,
>>
>> I don't think so, it seems that that jira is for a non-SIP based setup.
>>
>> My "issue" is that when calling a PSTN number from a mobile/landline
>> phone, which gets delivered by SIP to my FreeSwitch server and then routed
>> out to another PSTN number (via the same provider). When either party
>> presses a digit, the other end hears the tone. The tone is not the whole
>> tone just a fraction of it, maybe half a second, but enough to tell the
>> difference when different keys are pressed.  The key can be held for a long
>> period, say 3 seconds, but you will only hear the "bleeding".
>>
>> I have drop_dtmf set to true on both channels (set and export), but I'm
>> not sure if this would make any difference anyway as the tone is being sent
>> out-of-band.
>>
>> It might also be worth noting that I don't get any duplication of tones.
>> Pressing 123 will always receive 123 and not 112233.
>>
>> thanks
>> Matt
>>
>>
>> On 22 March 2013 16:54, Trever L. Adams <trever.adams at gmail.com> wrote:
>>
>>> On 03/12/2013 01:45 PM, Matt Broad wrote:
>>> > Ok, so the fact that a tone can be heard, although only partially,
>>> > would suggest inband digits are being sent too.  I'll speak to my
>>> > carrier and see if it is something they can supress their end.
>>> > Thanks for the help and the tips on debugging :)
>>> >
>>> > Thanks
>>> > Matt
>>> Matt, by chance is this what you are describing:
>>>
>>> http://jira.freeswitch.org/browse/FS-4904
>>>
>>> Trever
>>>
>>>
>>
>>
>> --
>> Thanks
>> Matt
>>
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-- 
Michael S Collins
Twitter: @mercutioviz
http://www.FreeSWITCH.org
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