Turn off inbound fax detection?

General Help
1

I just replaced an older installation based on FreePBX 2.9 and asterisk 1.4 to FreePBX 2.10 and asterisk 1.8.15. Both systems have a Sangoma A101d (1 x T1) card and run dahdi. I copied over the hylafax and iaxmodem configurations that were working fine on the old box to do inbound fax to email.

When I send a fax from another system running iaxmodem/hylafax, all is well. If I try to send a fax from a fax machine, I get:

Redirecting DAHDI/8-1 to fax extension

I’m not using any of the asterisk fax stuff and haven’t defined a fax extension, so this fails with the “ss-noservice” prompt and hangs up.

In chan_dahdi.conf I have “faxdetect=incoming”. If I make this “no”, sending a fax from the remote iaxmodem/hylafax server starts failing, with negotiation issues. Does making it “no” involve some kind of echo cancellation that is killing my fax negotiation?

Some guidance would be appreciated.

Thanks!

2

Remove the fax module from freepbx

3

Thanks for responding! I did do that, before I posted. Same result.

4

Add the following to the PEER details for each trunk:

faxdetect=no

You can also add it to the Asterisk SIP Settings module, at the bottom, in the custom section.

5

Hi, thanks for responding!

This gets me back to the original problem, however. The trunk in question is the Dahdi trunk, and if I put “faxdetect=no” in chan_dahdi.conf (I don’t see a way to do this in the GUI for the Dahdi trunk), then inbound faxes all fail with negotiation errors.

I suspect, based on a recent thread in the asterisk-users list, that “faxdetect=incoming” signals some special audio handling to assist with faxing, presumably in the asterisk core.

Basically I need to keep “faxdetect=incoming” in the Dahdi config but tell FreePBX never to redirect to a “fax extension”, and just follow the normal flow I have defined for DIDs.

I’ll play with the dialplan code to see if I can find a workaround and post that here.

Thanks!