Not sure what your min and max rtp ports do for your program (i assume though that's the rtp ports it sends from though, and is irrelevant. The default ones nec uses on its side of the conversation though is 10020-10083.
I don't know why NEC does the codec is pcpro as vague numbers. If you read the programming manual though, it tells you what they are
- Programming manual
- Features / specs manual.
Use the incapture on the pbx, do you see registration messages coming in? Open the trace file in wireshark, filter for sip, and try to see whats happening.
And try using a sip softphone on a pc to try and see it's your win-911 you are having trouble with. I've used microsip before.
While testing, you can also have wireshark installed locally on the computer with win911, or where you're testing with a softphone, and look at the conversation from the "phone" side.
As well, of course, do you have the IP Terminal liscenses on the PBX? If you are getting 401 unauthorized on your SIP registers, that may be the reason.
You can turn on temporary liscenses by pressing the speaker button, dialing #*#*, then entering the password for your installer account. Then go to 90-37 for temporary liscenses, and set it to 10. Exit with mute, press speaker button to get out. Reboot phone system. If this worked, you will see in feature activation that all are unlimited, and will be for 10 days. (Please note that I know this works for the 2100, and am just assuming it's the same on the 9100, which i've never tried to use a temp liscense with)