A quick test to a fax number doesn't seem to jump to the 'fax' extension. I 
checked faxdetect=both on chan_dahdi.conf. I seem to remember trying this some 
years back and finding that fax detect only worked for CNG tones, not CED tones?

Neil Youngman
 
________________________________________
From: asterisk-users-boun...@lists.digium.com 
[asterisk-users-boun...@lists.digium.com] on behalf of Tech Support 
[aster...@voipbusiness.us]
Sent: 09 February 2018 14:53
To: 'Asterisk Users Mailing List - Non-Commercial Discussion'
Subject: Re: [asterisk-users] AMD and fax detection

I think that there is a much easier way to detect if the far end is a fax.
In your dialplan, include a section that uses the 'fax' extension. If the
call jumps to that extension, then the far end is a fax machine.
Regards;
John V.

-----Original Message-----
From: asterisk-users-boun...@lists.digium.com
[mailto:asterisk-users-boun...@lists.digium.com] On Behalf Of Neil Youngman
Sent: Friday, February 09, 2018 09:10 AM
To: asterisk-users@lists.digium.com
Subject: [asterisk-users] AMD and fax detection

Is it feasible to enhance AMD to detect and report if the far end sends fax
tones?

I am guessing that, as it is using DSP to detect sounds and periods of
silence, the same DSP can also report if a CED tone is sent.

If it is feasible, is there a document describing the DSP interface that
someone who is not familiar with DSP can use to get started?

Neil Youngman


Neil Youngman
Developer
Wirefast Limited

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