[cisco-voip] Faxing over CUBE SIP Trunks

[Jason Aarons]

The providers should support t38 to be reliable.

On Mon, Jun 21, 2021, 2:27 PM JASON BURWELL via cisco-voip <
cisco-voip at 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
>
>
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