sure. This is what we had to do to get fax working for use on both vg’s. (202/322/fxs) and Rightfax/brook trout cards) Rightfax has the g711 failback enabled. IE it controls it not the cube.
Under voip service voip.. Fax protocol t38 version 0 ls-redundancy 0 hs-redundancy-fallback none sip Midcall-signaling passthru header-passing And the dial-peers towards the carriers: fax-relay ecm disable fax rate 14400 Good luck. Fax is an easy but fun/tough thing to make right. Put Wireshark on your server, it helps. Also, ,might need to force the max fax rate to 9600. > On Jun 21, 2021, at 12:26 PM, JASON BURWELL via cisco-voip > <cisco-voip@puck.nether.net> wrote: > > Can anyone offer some guidance doing faxing over SIP Trunks? Ever since > switching to CUBE SIP trunks I’ve been having challenges with outbound faxes. > With one provider, it rarely works, the other it works most of the time but > is not reliable. Sometime it fails and I resend it and works fine. I have an > Xmedius Fax Server using T38 with G711 fallback. Feel like I am missing > something, I’ve had a few cases open and a mix of fingerpointing > (XMedius/Cisco/Provider) and dead ends but no solid resolution. Just figured > I’d ask out here before I escalate these cases again. Both providers use G711 > codec on the trunks. When I point the calls pack to MGCP PRI I have no issues. > > Thanks > Jason > > _______________________________________________ > cisco-voip mailing list > cisco-voip@puck.nether.net <mailto:cisco-voip@puck.nether.net> > https://puck.nether.net/mailman/listinfo/cisco-voip > <https://puck.nether.net/mailman/listinfo/cisco-voip>
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