[Spce-user] T.38 <-> G.711 Transcoding

[Volodymyr Fedorov]

Hi Gabriel,
RTPengine has full t38 t30 support out of box. Basically it works in to mode. So if you set on peer t38 transcode when re-invite comes from subscribers RTPengine will activate t38 transcode.
Long time I made short video with demo of t38gateway capabilities: 
https://twitter.com/lexxua/status/1248894313528012800?s=19

Br,
Vova


________________________________
From: Gabriel Kuri <gkuri at ieee.org>
Sent: Tuesday, September 1, 2020 07:48
To: Raúl Alexis Betancor Santana
Cc: spce-user
Subject: Re: [Spce-user] T.38 <-> G.711 Transcoding

Hi Raul,

I suppose I misunderstood the transcoding capability in rtpengine, I thought it handled T.38 to G.711 transcoding in recent versions.

Any recommendations on a full T38 gateway that handles full T.38 <--> G.711 transcoding?

Thanks ...

On Mon, Aug 31, 2020 at 10:37 PM Raúl Alexis Betancor Santana <rabs at dimension-virtual.com> wrote:
>
> No, rtpengine lacks that transcoding capabilitie, for that you need a full T38 Gateway
>
> ________________________________
> From: "Gabriel Kuri" <gkuri at ieee.org>
> To: "spce-user" <spce-user at lists.sipwise.com>
> Sent: Monday, August 31, 2020 5:56:05 PM
> Subject: [Spce-user] T.38 <-> G.711 Transcoding
>
> Is it possible for C5 CE (using rtpengine) to transcode between T.38 (a-leg) and G.711 (b-leg) ?
>
> I've tried setting it up, but I can't figure out how to set the media settings facing each leg (t38_force, t38_decode. etc.).
>
> Here's the scenario ...
>
> A-leg (T.38): Analog Telephone Adapter
> B-leg (G.711): Carrier SIP Trunk
>
> On the A-leg, it would be good if we could force C5 CE to Re-INVITE T.38 to the ATA immediately at the start of the call. But not sure if C5 CE can do the Re-INVITE or if it must come from the ATA?
>
> On the B-leg, it would be good if we could stay on G.711 and refuse any T.38 Re-INVITES that may come in from the carrier?
>
> Thanks!
>
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