We are using latest version of FreePBX and latest firmware (1.51 / 220.127.116.11).
Our phones are connected using VPN to FreePBX.
Provisionning are working well, but NTP parameters seems to be not used / not working.
I’ve tried the private IP address of FreePBX, the public IP address (with opened port), the FQDN (just for fun).
No NTP synchronization. Our S705 phones continues having bad date/time.
Have you any idea ?