Is the gateway a PRI gateway? Which one is it? If it is a trunk provider, they must support re-invite for t.38 from, uLaw.
If you are getting a 0 byte tiff, you may not have the latest code (pdf is default in the latest update, I think). Besides that, "0" byte means there was a communications failure and the transaction never really happened, in that it never processed a full page. This could indicate a provider who cannot negotiate properly between pages or End of Page. How you have t.38 enabled in your gateway does make a difference too. On Tue, Mar 13, 2012 at 5:23 PM, Joe Micciche <[email protected]> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Thanks Todd. I enabled t.38 and I'm still getting a 0 byte tiff, I'll > dig into it more tomorrow. > > joe > > On 03/13/2012 04:57 PM, Todd Hodgen wrote: > > Joe, I think if you enable t.38 in your gateway, things will begin > > to work. I have customers receiving calls via PSTN connected fax > > machines, PRI gateway has T.38 enabled, they are forwarded to > > customer voicemail account. I did have to go into the gateway and > > turn on T.38 for it to start working. > > > > -----Original Message----- From: > > [email protected] > > [mailto:[email protected]] On Behalf Of Joe > > Micciche Sent: Tuesday, March 13, 2012 1:37 PM To: Discussion list > > for users of sipXecs software Subject: [sipx-users] Is fax supposed > > to work w/o t.38? > > > > 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. > > > > _______________________________________________ sipx-users mailing > > list [email protected] List Archive: > > http://list.sipfoundry.org/archive/sipx-users/ > > > > - -- > ================================================================== > Joe Micciche [email protected] > Red Hat, Inc. http://www.redhat.com > Senior Communications Engineer X (81) 44554 > +1.919.754.4554 Key: 65F90FE1 > ================================================================== > > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.12 (GNU/Linux) > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ > > iEYEARECAAYFAk9futUACgkQJHjEUGX5D+G7+wCeK1k+k/ovGCpICBt4Ih8bVW3V > QlIAn2KZcdOQRYZOmpRZs79XNw+pJets > =wUbb > -----END PGP SIGNATURE----- > _______________________________________________ > sipx-users mailing list > [email protected] > List Archive: http://list.sipfoundry.org/archive/sipx-users/ > -- ~~~~~~~~~~~~~~~~~~ Tony Graziano, Manager Telephone: 434.984.8430 sip: [email protected] Fax: 434.465.6833 ~~~~~~~~~~~~~~~~~~ Linked-In Profile: http://www.linkedin.com/pub/tony-graziano/14/4a6/7a4 Ask about our Internet Fax services! ~~~~~~~~~~~~~~~~~~ -- LAN/Telephony/Security and Control Systems Helpdesk: Telephone: 434.984.8426 sip: [email protected] Helpdesk Customers: http://myhelp.myitdepartment.net Blog: http://blog.myitdepartment.net
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