The providers should support t38 to be reliable. On Mon, Jun 21, 2021, 2:27 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 > https://puck.nether.net/mailman/listinfo/cisco-voip >
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