I have a client that has cisco phones 7911, 7941 and 7942 so that these could work I had to modify the parameters NDLB-force-rport value=safe enable=false and aggressive-nat-detection value=true enabled=false. With that I can make Cisco phones communicate without interruptions, but the clients with gswave, despite being in a different network, register but those extensions cannot be called and if you call from the softphone the call only lasts 30 seconds. i think the problem is that the softphone needs to register as udp-nat but i can't do this