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. Regards, Steve