This will be my first installation on 3cx so apologies for the questions. Here is the scenario. 3 x PSTN lines coming into building. Customer wants lines 1 & 2 to go to specific handsets only line 3 is to come in, hit a Digital receptionist and give some options. once the caller presses the required option the call gets route to the required extension be it offsite via the IOS app or softphone etc.. I can understand the inbound call routing and the configuration but am trying to work out what VoIP Gateway card to use. To start with the customer is only using the PSTN lines for incoming and outgoing calls not any VoIP service provider. Any help is gratefully received.