Zoom as main voice on network

Good day, we are in the process of setting up our voice network but we have decided to go ahead with using zoom as our main form of voice on our network. 

I am wondering how should we configure this.. should I have to configure a port on my firewall or should I just create some sort of policy with a vlan to allow voice traffic? 

Also, we are not using physical phones since its a bpm. 

Thank you.