[Freeswitch-users] Strange DTMF Tones On Inbound Calls

[Daniel Knaggs]

Update, it would appear (so far) that this has worked.

I can see in the log numerous “Rogue digit: DTMF 'A' received” entries (and also for “C”) and I’ve asked the users if they have heard any more tones and they haven’t.


Thanks, Michael.   So we’ve managed to work around it, but how can I track down what is generating these tones to begin with?  Is my earlier spectrum analysis of a call any good?


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Daniel Knaggs

Software Developer


        Reality Solutions Ltd, 1 Global Business Park, Hamburg Road, Kingston upon Hull, East Yorkshire, HU7 0AE
Tel: 01482 828000 / Fax: 01482 373100
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From: Daniel Knaggs
Sent: 03 April 2012 11:23
To: 'FreeSWITCH Users Help'
Subject: RE: [Freeswitch-users] Strange DTMF Tones On Inbound Calls

OK, I’ve added the BDA’s to the ISDN dialplan and removed my binding for parking calls (no-one uses that apart from me – I find it very useful!).

Let’s see what happens…

From: freeswitch-users-bounces at lists.freeswitch.org<mailto:freeswitch-users-bounces at lists.freeswitch.org> [mailto:freeswitch-users-bounces at lists.freeswitch.org]<mailto:[mailto:freeswitch-users-bounces at lists.freeswitch.org]> On Behalf Of Michael Collins
Sent: 02 April 2012 16:44
To: FreeSWITCH Users Help
Subject: Re: [Freeswitch-users] Strange DTMF Tones On Inbound Calls

Maybe bind_digit_action would capture these for you. You could try binding something simple, like a log function:

<action application="bind_digit_action" data="rogue_dtmf,~\w+,exec:log,INFO Rogue digit(s): ${last_matching_digits}"/>
<action application="digit_action_set_realm" data="rogue_dtmf"/>

You'll need to experiment to make sure that regex works. If not you could possibly do each digit explicity, like this:
<action application="bind_digit_action" data="rogue_dtmf,A,exec:log,INFO Rogue digit: DTMF 'A' received"/>
<action application="bind_digit_action" data="rogue_dtmf,B,exec:log,INFO Rogue digit: DTMF 'B' received"/>
<action application="bind_digit_action" data="rogue_dtmf,C,exec:log,INFO Rogue digit: DTMF 'C' received"/>
<action application="bind_digit_action" data="rogue_dtmf,D,exec:log,INFO Rogue digit: DTMF 'D' received"/>

I don't honestly know if this will work, but I'd like to see what happens in your case. FYI, you can read up on bind_digit_action (AKA 'bda') here:

http://wiki.freeswitch.org/wiki/Misc._Dialplan_Tools_bind_digit_action

-MC
On Mon, Apr 2, 2012 at 5:29 AM, Daniel Knaggs <Daniel.Knaggs at realitysolutions.co.uk<mailto:Daniel.Knaggs at realitysolutions.co.uk>> wrote:
Interesting, how would I do this?  Can’t use “bind_meta_app” since that only works with numbers…  The tones appear from the caller not the callee (leg A).

From: freeswitch-users-bounces at lists.freeswitch.org<mailto:freeswitch-users-bounces at lists.freeswitch.org> [mailto:freeswitch-users-bounces at lists.freeswitch.org<mailto:freeswitch-users-bounces at lists.freeswitch.org>] On Behalf Of Wesley Akio
Sent: 02 April 2012 12:57

To: FreeSWITCH Users Help
Subject: Re: [Freeswitch-users] Strange DTMF Tones On Inbound Calls


If all you wish is to purge the tones from your stream you can simply capture them in the dialplan, no need to mess with the source...

Best,

Wesley Akio
Em 02/04/2012 05:17, "Daniel Knaggs" <Daniel.Knaggs at realitysolutions.co.uk<mailto:Daniel.Knaggs at realitysolutions.co.uk>> escreveu:
I appreciate your honesty, Gabe.  But seriously, is that the reason no-one else is responding or is it because no-one has any ideas?

Unfortunately, I don’t (and can’t) control what appears on my signature as it’s added by our e-mail gateway not my e-mail client (if it can’t see a signature on the e-mail it will add it).

From: freeswitch-users-bounces at lists.freeswitch.org<mailto:freeswitch-users-bounces at lists.freeswitch.org> [mailto:freeswitch-users-bounces at lists.freeswitch.org<mailto:freeswitch-users-bounces at lists.freeswitch.org>] On Behalf Of Gabriel Gunderson
Sent: 31 March 2012 09:12
To: FreeSWITCH Users Help
Subject: Re: [Freeswitch-users] Strange DTMF Tones On Inbound Calls

On Fri, Mar 30, 2012 at 2:16 AM, Daniel Knaggs <Daniel.Knaggs at realitysolutions.co.uk<mailto:Daniel.Knaggs at realitysolutions.co.uk>> wrote:
Any ideas, anyone?

I'll be honest. I haven't followed the thread because of the loud, in-your-face advertisement in the email footer. Nobody is going to make you remove it, but they might respond to more of your emails if you show them that you respect the list by not cluttering it with noise.

Just my 2 cents.  And of course good luck on the issue.





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