MyPBX Yeastar P560 without subscription plans. Connected to internet via a router, NAT: PBX_LAN_port>>>Router_LAN_port>>>ROUTER_WAN_port>>>Internet
I forwarded port's from external IP on the router to internal IP PBX:
TCP and UDP: 5060, 8111, 10000-12000
On Linksys Mobile (Android) i setup manually IP address router's WAN, Links connects and can make and receive calls. But in the call both side don't hear a sound.
Should Link us work without subscription on a P-series ?