Now it is possible to receive calls from PSTN normally. The ACK problem was solved, but to do this I had to apply a workaround. The solution was to create a inbound port forwarding to UDP and TCP port 5060 to one IP address on the routerĀ“s firewall.
I consider this not a solution, but a workaround because I now there is a static mapping to a specific IP address. Some weeks ago everything worked smoothly without this configuration and was possible to answer calls on any IP address/machine on the network, as soon it was registered to voxalot.
I would like to know if this procedure is normal and really necessary or it is possible to have a dynamic condition as was before.
Thanks