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  1. Cannot register Yealink T32 across VPN

    We have a 3CX version 11 PBX on a 192.168.1.0 /24 subnet. There is a hardware site-site VPN between the gateway of this LAN and another LAN on 10.75.75.0 /24. Pings from the PBX machine (192.168.1.50) to the Yealink phone (10.75.75.106) work both ways but the phone fails to register with the...