[asterisk-users] ReceiveFax to G.711

[Michael]

Thanks. That's what I did, and it forced G.711, but the problem is that the
fax failed anyway. Although a lot of RTP packets went through, the end
result was an empty tif file :-(

Kevin, the F option is an excellent idea. Great.

On Mon, Jun 27, 2011 at 10:14 PM, <isrlgb at gmail.com> wrote:

> You could force g711 inbound by using
>
> Set(SIP_CODEC=ulaw)
> -----Original Message-----
> From: "Kevin P. Fleming" <kpfleming at digium.com>
> Sender: asterisk-users-bounces at lists.digium.com
> Date: Mon, 27 Jun 2011 14:08:00
> To: <asterisk-users at lists.digium.com>
> Reply-To: Asterisk Users Mailing List - Non-Commercial Discussion
>        <asterisk-users at lists.digium.com>
> Subject: Re: [asterisk-users] ReceiveFax to G.711
>
> On 06/27/2011 08:06 AM, Michael wrote:
>
> > Controlling it through the sip.conf peers is sufficient for us for this
> > case (because this particular provider doesn't support T.38 at all), but
> > I think it would be a good idea to add the option to enable/disable T.38
> > from the dialplan. If I recall correctly, that's how callweaver worked
> > at the time.
>
> In Asterisk trunk (soon to become Asterisk 1.10), there is an 'F' option
> to ReceiveFAX and SendFAX that forces audio mode FAX even if the channel
> is T.38 capable. That would do what you want. I posted a patch some time
> ago for Asterisk 1.8 to add the same ability, but it probably doesn't
> apply any more... the it's only a few lines though, it should be fairly
> easy to replicate in the Asterisk 1.8 version of res_fax.c
>
> > Also, we just checked it, and since for that provider, we have other
> > codecs in higher priorities (like GSM, for example) than G.711, G.711
> > was not chosen as the only codec, so the fax transmission failed. We can
> > not prioritize G.711 over the other codecs in the sip.conf, for the
> > obvious reasons, so for this, we need to do it in the dialplan. How can
> > we do it?
>
> How are you going to determine that you need to force G.711 to be used?
>
> --
> Kevin P. Fleming
> Digium, Inc. | Director of Software Technologies
> Jabber: kfleming at digium.com | SIP: kpfleming at digium.com | Skype: kpfleming
> 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
> Check us out at www.digium.com & www.asterisk.org
>
> --
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