[Freeswitch-users] Strange DTMF Tones On Inbound Calls

Daniel Knaggs Daniel.Knaggs at realitysolutions.co.uk
Fri Apr 13 11:35:30 MSD 2012

That's very interesting, Nathan.

Now that makes three of us, two using the Digium cards and one using a Sangoma.

It very much looks like something FreeSwitch is doing, perhaps the DTMF detection is far too sensitive?  Are DTMF tones for an ISDN line inband or do they come in on the D-channel?

Michael - any ideas what we can all do?

From: Nathan Eisenberg [mailto:nathan at atlasnetworks.us]
Sent: 13 April 2012 00:21
To: Daniel Knaggs
Subject: [Freeswitch-users] Strange DTMF Tones On Inbound Calls

I'm having the exact issue you're describing, with the same card.  However, what's interesting to me is that if I fire up Asterisk instead of freeswitch, the phantom DTMF problem disappears entirely.

So it's *something* inside Freeswitch, at least for me.  Would be interesting if you're able to do a similar test.
Nathan Eisenberg
Atlas Networks | Sr. Systems Administrator
office: 206.577.3078  |  www.atlasnetworks.us

Daniel Knaggs
Software Developer

Reality Solutions Ltd
1 Global Business Park
Hamburg Road
Kingston upon Hull
East Yorkshire, HU7 0AE

Tel:    01482 373104
Mobile: 07932 408313
Email:  mailto:Daniel.Knaggs at realitysolutions.co.uk

Join us at ClueCon 2011 Aug 9-11, 2011
More information about the FreeSWITCH-users mailing list