I'd do an audio recording of the call and open the resulting file in Audacity. It can do kind of a spectrum analysis to show you if there are any frequencies that might be fooling the dtmf detector. Also, I'm not familiar with using Digium cards with FreeTDM. (I have a Digium TE121 or similar but I don't happen to have any mobo's with the PCIe or whatever slot type it uses.)

To Moises I'd ask: is there hardware DTMF detection in the Digium cards that you know of? Also, any known or suspected issues with false DTMF detection in the scenario mentioned by the OP?

Gracias,
MC

On Sat, Mar 24, 2012 at 5:27 AM, Daniel Knaggs <Daniel.Knaggs@realitysolutions.co.uk> wrote:

They aren’t any faults that I can see.

 

From: freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch-users-bounces@lists.freeswitch.org] On Behalf Of curriegrad2004
Sent: 23 March 2012 23:23
To: FreeSWITCH Users Help
Subject: Re: [Freeswitch-users] Strange DTMF Tones On Inbound Calls

 

Have you checked for any faults on your TDM link on your side?

On Fri, Mar 23, 2012 at 10:32 AM, Brian Foster <bdfoster@endigotech.com> wrote:

Please update to latest git.

 

-BDF

On Fri, Mar 23, 2012 at 7:19 AM, Daniel Knaggs <Daniel.Knaggs@realitysolutions.co.uk> wrote:

Hello all,

 

Got a bit of a strange one, we appear to be getting DTMF tones on incoming calls when the caller hasn’t even pressed any keys.

 

It normally happens with 10 seconds or so after the call has been answered.

 

 

Here is the log of it happening earlier: -

 

2012-03-23 10:38:16.852654 [DEBUG] ftdm_io.c:3530 [s1c2][1:2] Queuing DTMF A (debug = 0)

2012-03-23 10:38:16.852654 [DEBUG] mod_freetdm.c:799 Queuing DTMF [A] in channel FreeTDM/1:2/000 device 1:2

2012-03-23 10:38:16.915653 [DEBUG] switch_rtp.c:2420 Send start packet for [A] ts=49440 dur=160/160/2000 seq=46803 lw=49440

2012-03-23 10:38:16.936653 [DEBUG] switch_rtp.c:2323 Send middle packet for [A] ts=49440 dur=320/320/2000 seq=46804 lw=49600

2012-03-23 10:38:16.957652 [DEBUG] switch_rtp.c:2323 Send middle packet for [A] ts=49440 dur=480/480/2000 seq=46805 lw=49760

2012-03-23 10:38:16.978652 [DEBUG] switch_rtp.c:2323 Send middle packet for [A] ts=49440 dur=640/640/2000 seq=46806 lw=49920

2012-03-23 10:38:16.999652 [DEBUG] switch_rtp.c:2323 Send middle packet for [A] ts=49440 dur=800/800/2000 seq=46807 lw=50080

2012-03-23 10:38:17.020651 [DEBUG] switch_rtp.c:2323 Send middle packet for [A] ts=49440 dur=960/960/2000 seq=46808 lw=50240

2012-03-23 10:38:17.041651 [DEBUG] switch_rtp.c:2323 Send middle packet for [A] ts=49440 dur=1120/1120/2000 seq=46809 lw=50400

2012-03-23 10:38:17.062651 [DEBUG] switch_rtp.c:2323 Send middle packet for [A] ts=49440 dur=1280/1280/2000 seq=46810 lw=50560

2012-03-23 10:38:17.083650 [DEBUG] switch_rtp.c:2323 Send middle packet for [A] ts=49440 dur=1440/1440/2000 seq=46811 lw=50720

2012-03-23 10:38:17.104650 [DEBUG] switch_rtp.c:2323 Send middle packet for [A] ts=49440 dur=1600/1600/2000 seq=46812 lw=50880

2012-03-23 10:38:17.125650 [DEBUG] switch_rtp.c:2323 Send middle packet for [A] ts=49440 dur=1760/1760/2000 seq=46813 lw=51040

2012-03-23 10:38:17.146650 [DEBUG] switch_rtp.c:2323 Send middle packet for [A] ts=49440 dur=1920/1920/2000 seq=46814 lw=51200

2012-03-23 10:38:17.167661 [DEBUG] switch_rtp.c:2323 Send end packet for [A] ts=49440 dur=2080/2080/2000 seq=46815 lw=51200

2012-03-23 10:38:17.167661 [DEBUG] switch_rtp.c:2323 Send end packet for [A] ts=49440 dur=2080/2080/2000 seq=46816 lw=51200

2012-03-23 10:38:17.167661 [DEBUG] switch_rtp.c:2323 Send end packet for [A] ts=49440 dur=2080/2080/2000 seq=46817 lw=51200

2012-03-23 10:38:17.167661 [DEBUG] switch_rtp.c:2271 Queue digit delay of 40ms

2012-03-23 10:38:18.070638 [DEBUG] ftdm_io.c:3530 [s1c2][1:2] Queuing DTMF B (debug = 0)

2012-03-23 10:38:18.070638 [DEBUG] mod_freetdm.c:799 Queuing DTMF [B] in channel FreeTDM/1:2/000 device 1:2

2012-03-23 10:38:18.133637 [DEBUG] switch_rtp.c:2420 Send start packet for [B] ts=59040 dur=160/160/2000 seq=46864 lw=59040

2012-03-23 10:38:18.154637 [DEBUG] switch_rtp.c:2323 Send middle packet for [B] ts=59040 dur=320/320/2000 seq=46865 lw=59200

2012-03-23 10:38:18.175637 [DEBUG] switch_rtp.c:2323 Send middle packet for [B] ts=59040 dur=480/480/2000 seq=46866 lw=59360

2012-03-23 10:38:18.196636 [DEBUG] switch_rtp.c:2323 Send middle packet for [B] ts=59040 dur=640/640/2000 seq=46867 lw=59520

2012-03-23 10:38:18.217636 [DEBUG] switch_rtp.c:2323 Send middle packet for [B] ts=59040 dur=800/800/2000 seq=46868 lw=59680

2012-03-23 10:38:18.238636 [DEBUG] switch_rtp.c:2323 Send middle packet for [B] ts=59040 dur=960/960/2000 seq=46869 lw=59840

2012-03-23 10:38:18.259636 [DEBUG] switch_rtp.c:2323 Send middle packet for [B] ts=59040 dur=1120/1120/2000 seq=46870 lw=60000

2012-03-23 10:38:18.280636 [DEBUG] switch_rtp.c:2323 Send middle packet for [B] ts=59040 dur=1280/1280/2000 seq=46871 lw=60160

2012-03-23 10:38:18.301635 [DEBUG] switch_rtp.c:2323 Send middle packet for [B] ts=59040 dur=1440/1440/2000 seq=46872 lw=60320

2012-03-23 10:38:18.322635 [DEBUG] switch_rtp.c:2323 Send middle packet for [B] ts=59040 dur=1600/1600/2000 seq=46873 lw=60480

2012-03-23 10:38:18.343634 [DEBUG] switch_rtp.c:2323 Send middle packet for [B] ts=59040 dur=1760/1760/2000 seq=46874 lw=60640

2012-03-23 10:38:18.364634 [DEBUG] switch_rtp.c:2323 Send middle packet for [B] ts=59040 dur=1920/1920/2000 seq=46875 lw=60800

2012-03-23 10:38:18.385634 [DEBUG] switch_rtp.c:2323 Send end packet for [B] ts=59040 dur=2080/2080/2000 seq=46876 lw=60800

2012-03-23 10:38:18.385634 [DEBUG] switch_rtp.c:2323 Send end packet for [B] ts=59040 dur=2080/2080/2000 seq=46877 lw=60800

2012-03-23 10:38:18.385634 [DEBUG] switch_rtp.c:2323 Send end packet for [B] ts=59040 dur=2080/2080/2000 seq=46878 lw=60800

 

 

I’m very sure the caller isn’t dialling “A” or “B”!

 

Running on ISDN via a TE121 card using E1 (euroisdn).  Freeswitch version is “FreeSWITCH Version 1.0.head (git-b9b7266 2012-02-10 12-23-58 -0600)”.

 

 

Currently there is a “bind_meta_app” in the config which binds a script on the B leg of the call which parks the call – I haven’t tried turning this off yet to see if it’s this.

 

 

Wondering if anyone has any ideas or has come across this before?

 

 

Thanks in advance.

Description: cid:imageacd695.PNG@9e92e461.40aa4b96

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
Daniel.Knaggs@realitysolutions.co.uk
www.realitysolutions.co.uk

Sage Accredited Business Partner serving businesses in Yorkshire & Lincolnshire

Description: cid:image27a71e.PNG@c2da8488.4683bff1

 

 

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--
Brian D. Foster
Endigo Computer LLC
Email: bdfoster@endigotech.com
Phone: 317-800-7876
Indianapolis, Indiana, USA

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_________________________________________________________________________
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FreeSWITCH-powered IP PBX: The CudaTel Communication Server
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_________________________________________________________________________
Professional FreeSWITCH Consulting Services:
consulting@freeswitch.org
http://www.freeswitchsolutions.com

FreeSWITCH-powered IP PBX: The CudaTel Communication Server
http://www.cudatel.com

Official FreeSWITCH Sites
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