[Freeswitch-users] inband DTMF bleeding through

Michael Collins msc at freeswitch.org
Tue Mar 19 19:55:00 MSK 2013


One thing I didn't see in this thread was how the call terminates at your
FreeSWITCH box. Is it an analog line or a SIP trunk or what?

-MC

On Fri, Mar 15, 2013 at 3:44 AM, Matt Broad <matt at inveroak.com> wrote:

> Hi
>
> after speaking to my carrier, they have told me that the tone will always
> be heard when sent via the PSTN. There is nothing they or BT can do
> to suppress the tones.
> Is this something that can be done within Freeswitch? To either remove the
> tone altogether or to replace it with something else?
>
> thanks
> Matt
>
>
> On 12 March 2013 19:45, Matt Broad <matt at inveroak.com> 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
>>
>>
>> On Tuesday, 12 March 2013, Avi Marcus wrote:
>>
>>> To listen to the audio:
>>> In wireshark, go to telephony -> voip calls -> *wait a second* -> click
>>> select all -> player -> decode -> check the box for both channels -> play,
>>> to listen to the actual call.
>>>
>>> -Avi
>>>
>>> On Tue, Mar 12, 2013 at 5:03 PM, Matt Broad <matt at inveroak.com> wrote:
>>>
>>> Hi Avi,
>>>
>>> thanks for the tips, wireshark & tcpdump are great!
>>>
>>> I have collected the PCAP file after making a call and can see the RTP
>>> events that show the tones being sent.  How do I now determine if an inband
>>> tone is also being sent?
>>>
>>> thanks
>>> Matt
>>>
>>>
>>> On 11 March 2013 21:27, Avi Marcus <avi at avimarcus.net> wrote:
>>>
>>> Once you get a PCAP, you can open it up in wireshark.
>>> Then, you can put in the filter: rtpevent.
>>> That will show you rfc2833 that comes in.
>>>
>>> Then you can go to telephone -> voip calls -> *wait a second* -> click
>>> select all -> player -> decode -> check the box for both channels -> play,
>>> to listen to the actual call.
>>>
>>> -Avi Marcus
>>> BestFone
>>>
>>> On Mon, Mar 11, 2013 at 10:12 PM, Matt Broad <matt at inveroak.com> wrote:
>>>
>>> Thanks Steve, thanks nick. Ill take a look at those links :)
>>>
>>> Is there anything in particular I should be looking out for to see if
>>> any inbound is sneaking in?
>>>
>>> Again Thanks for the help
>>> Matt
>>>
>>>
>>> On Monday, 11 March 2013, Nick Vines wrote:
>>>
>>> This might also help
>>>
>>> General Debugging Freeswitch:
>>> http://wiki.freeswitch.org/wiki/Debugging_Freeswitch
>>> Packet Capture: http://wiki.freeswitch.org/wiki/Packet_Capture
>>>
>>>
>>> On Mon, Mar 11, 2013 at 10:03 AM, Steven Ayre <steveayre at gmail.com>wrote:
>>>
>>> PCAP is the file format used by packet capturing tools such as tcpdump,
>>> Wireshark, tshark (Wireshark's command line tool), ngrep and a host of
>>> others.
>>>
>>> -Steve
>>>
>>>
>>>
>>>
>>>
>>> On 11 March 2013 15:21, Matt Broad <matt at inveroak.com> wrote:
>>>
>>> Hi Avi
>>>
>>> thanks for your response.
>>>
>>> Sorry I'm quite new to Freeswitch/linux, what is a PCAP?
>>> I was leaning towards it being the carrier as omitting dropt_dtmf
>>> results in the full tone being transmitted. My issue is that I cannot see
>>> how to test is this in fact the case.
>>>
>>> Using the dialplan shown in my original emails and setting the log level
>>> to 7, when making the call I can see the DTMF tones coming in but am unsure
>>> if this is the inband being reported or the out-of band.
>>>
>>> thanks
>>> Matt
>>>
>>>
>>>
>>> _________________________________________________________________________
>>> Professional FreeSWITCH Consulting Services:
>>> consulting at freeswitch.org
>>> http://www.freeswitchsolutions.com
>>>
>>> 
>>> 
>>>
>>> Official FreeSWITCH Sites
>>>  <http://www.freeswitch.org>
>>>
>>>
>>
>> --
>> Thanks
>> Matt
>>
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>
>
>
> --
> Thanks
> Matt
>
> This email and any attachments to it are confidential and are intended
> solely for the use of the individual to whom it is addressed. Any views or
> opinions expressed are solely those of the author and do not necessarily
> represent those of InverOak Limited.
>
> If you are not the intended recipient of this email, you must neither take
> any action based upon its contents, nor copy or show it to anyone. Please
> contact the sender if you believe you have received this email in error.
>
> This email including any attachments cannot be guaranteed to be 100%
> secure or error-free as information could be intercepted, corrupted, lost,
> destroyed, out-dated, or containing viruses. The sender therefore does not
> accept liability for any errors or omissions in the contents of this
> message which arise as a result of email transmission.
>
> InverOak Limited is a company registered in England & Wales under company
> number 04529594, whose registered address is Old Barn house, 2 Wannions
> Close, Botley, Chesham, Buckinghamshire, HP5 1YA, United Kingdom.
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> 
> 
>
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>


-- 
Michael S Collins
Twitter: @mercutioviz
http://www.FreeSWITCH.org
http://www.ClueCon.com
http://www.OSTAG.org
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