[Freeswitch-dev] t38

Anthony Minessale anthony.minessale at gmail.com
Fri Jun 4 09:04:41 PDT 2010

it's a media bug.
it just hides in the background like fax_detect and if it hears a fax tone
it turns into gateway mode.
from there it can re-invite OR wait for re-invite, if no negotiation is made
it will pass the audio fax across anyway.
passthrough is turned on with a variable, if set everything goes on as
normal (no need for proxy mode)
it will pass the t38 invite both ways and if it realizes there is a t38
negotiation it will pass it.

for regular termination it's just automatic, either send or wait for
re-invite based on config

It probably does everything and anything you want better than you think,
just try it.....

On Fri, Jun 4, 2010 at 10:35 AM, Kristian Kielhofner <kris at kriskinc.com>wrote:

> You could use FreeSWITCH in proxy media or bypass media without any
> specific T38 support right now...
> On Fri, Jun 4, 2010 at 11:17 AM, Peder <peder at networkoblivion.com> wrote:
> > Is T38 forced on if you do this, or does it just enable the feature if it
> > sees it in a reinvite?  We have a bunch of fax lines w/ SPA2102 and then
> we
> > use Cisco routers as PRI-SIP gateways.  Some of the people use the lines
> for
> > phone too, so I need it to support T38 and regular g711 calls.  Right now
> we
> > just point the SPAs direct to the Cisco gateway and it works fine, but we
> > lose all accounting capability, voicemail, etc that we want/need.
> >
> --
> Kristian Kielhofner
> http://www.astlinux.org
> http://blog.krisk.org
> http://www.star2star.com
> http://www.submityoursip.com
> http://www.voalte.com
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Anthony Minessale II

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