It will not work without t.38 for sure.
On Mar 13, 2012 4:37 PM, "Joe Micciche" <[email protected]> wrote:

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> I read through many of the threads and JIRAs about fax, but this
> wasn't clear. In sipXecs 4.4, is fax via PCMU supposed to work? or is
> it designed to work with only t.38?
>
> I tested a fax: the machine dialed to sipXecs via a gateway @g711U and
> the session was 44 secs (1 page). I received the fax notification via
> email, but the tiff was 0 bytes. The analog fax indicated success.
>
> In looking at a trace of the session, FS is sending a reINVITE and
> offering t.38; my gateway replies 488/Not Acceptable Media (since it
> is only set up for g711u at the moment), and the session is terminated
> at the 3 second mark.
>
> - --
> ==================================================================
> Joe Micciche                            [email protected]
> Red Hat, Inc.                           http://www.redhat.com
> Senior Communications Engineer          X (81) 44554
> +1.919.754.4554                         Key: 65F90FE1
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