[Freeswitch-users] Sending t38 No-Signal packets while receiving a fax page with mod_spandsp
brian at freeswitch.com
Wed Nov 13 19:55:47 UTC 2019
Send me the details and I can expose that.
On Wed, Nov 13, 2019 at 11:45 AM Steve Underwood <coppice12 at gmail.com>
> On 11/13/19 6:03 PM, Daniel Greenwald wrote:
> > Anyone know if freeswitch can be made to send periodic No-signal
> > packets while receiving a page data pump? Carrier's SBC is hitting an
> > RTP timer during long page transfers because freeswitch/spandsp is
> > completely silent while receiving a page. Other T38 switches I've
> > noticed will send a No-Signal packet every 300ms seconds as a
> > keep-alive. This can be seen in the top screenshot below. Lower one is
> > freeswitch receiving a page silently.
> So, you've found yet another broken buggy system that doesn't follow
> standards. Surprise, surprise. If you find the person who made the
> system require no signal packets every 300ms can you find a 4x2 and wack
> them around the head with it for me, please?
> There is an option in spandsp itself to make it regularly repeat the
> indicator signals, to tolerate this kind of broken behaviour. I'm not
> sure if the Freeswitch module exposes that capability.
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