On 01/26/2011 12:42 PM, Bryant Zimmerman wrote:
Steve

Are there any undocumented options available with ReceiveFAX and the
res_fax_spandsp module.
I am having issues with getting t.38 to negotiate with Level 3 faxes but
if I force t.30 the fax comes in. But the fax does not fall back t.30 if
the t.38 fails

You haven't posted any logs of the failing attempts, or packet captures of the SIP traffic, so it's pretty much impossible for anyone to help you debug this (anyone who tried would just be guessing).

Steve did not write res_fax (which where SendFAX and ReceiveFAX come from), and there are no 'undocumented' options available for it, because it's open source and the source code shows all the options that are available.

If you would like to try to figure out what is going on, start by posting a *complete* log file from Asterisk for a failed inbound FAX attempt, with 'core set debug 10' and 'core set verbose 10' and all logger levels (including 'fax') enabled.

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Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
skype: kpfleming | jabber: [email protected]
Check us out at www.digium.com & www.asterisk.org

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