Sergio, I apologize, I re-read my upstream's documentation again and they said prioritizing g711ulaw will allow incoming faxes to do a t38 re-invite.
Daniel, Thank you for the information, I will check out those references. On Fri, Feb 14, 2025 at 2:54 PM Sergio Charrua <[email protected]> wrote: > Honestly, for faxing and t38, you should use g711 a/uLaw only or a high > bit rate/high quality codec! > Fax is a 9.6kbps (or 14.4kbps) codec and g729a is 8kbps, a low bit rate > codec. > How do you expect to have it working using g729a which will compress fax > data even more? > > Check this article https://www.voip-info.org/asterisk-fax/ ... it is 20 > years old, already, but still very accurate. > > Atenciosamente / Kind Regards / Cordialement / Un saludo, > > > *Sérgio Charrua* > > On Fri, Feb 14, 2025 at 6:48 PM Temilolu Fayomi via sr-users < > [email protected]> wrote: > >> Hello, >> >> I am working with inbound calls on kamailio (specifically fax), and was >> wondering if there was a way to re-prioritize the codecs found in the sdp >> of an invite. I've looked at using the sdpops module, but haven't been able >> to re-arrange the priority of the codecs listed. I've tried removing codecs >> to help incoming faxes switch over to t38 per my upstream providers >> instructions (calls will do a t38 re-invite if the g729a is the highest >> priority). I am just looking for which direction to go from here or if I >> misunderstand the nature of faxing and kamailio. >> >> Thank you in advance, >> Temilolu Fayomi >> __________________________________________________________ >> Kamailio - Users Mailing List - Non Commercial Discussions -- >> [email protected] >> To unsubscribe send an email to [email protected] >> Important: keep the mailing list in the recipients, do not reply only to >> the sender! >> > -- *Temilolu Fayomi* *[email protected] <[email protected]>*
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