Fax not detected by Asterisk

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Asterisk Users 5 Comments

Hello List,

I have an Elastix 2 machine with digium fax modules (with license).
When I try to create an extension that also works with FAX, Asterisk does
not detect any incoming fax. Even when I use ‘fax set debug’, it does not
display anything.
It’s Asterisk 6.2.x . Any ideas what can I do to figure out why it does not
detect the arriving faxes ?

Thanks,

Ido

5 thoughts on - Fax not detected by Asterisk

  • Fax is detected at ring/start level. Check chan_dahdi.conf.

    Sent: Thursday, November 17, 2011 5:30 AM

    Hello List,

    I have an Elastix 2 machine with digium fax modules (with license).
    When I try to create an extension that also works with FAX, Asterisk does not detect any incoming fax. Even when I use ‘fax set debug’, it does not display anything.
    It’s Asterisk 6.2.x . Any ideas what can I do to figure out why it does not detect the arriving faxes ?

    Thanks,

    Ido

  • in your dialplan, did you “Answer” the call and “Wait”
    a few seconds for Asterisk to detect the fax tone before
    you do some other things?

  • Maybe a progress() command would help?

    Sent: Friday, November 18, 2011 1:44 PM

    I have an Elastix 2 machine with digium fax modules (with license).
    When I try to create an extension that also works with FAX, Asterisk does not
    detect any incoming fax. Even when I use ‘fax set debug’, it does not display
    anything.
    It’s Asterisk 6.2.x . Any ideas what can I do to figure out why it does not detect
    the arriving faxes ?

    in your dialplan, did you “Answer” the call and “Wait”
    a few seconds for Asterisk to detect the fax tone before
    you do some other things?

    Yes, I placed a wait up to 10 seconds just to make sure