Advanced Sessions Plugin

I’m new to multiplayer, so I’d like to know if there is a way to use the advanced sessions plugin to connect with other people (and most importantly have VOIP), but without using Steam online subsystem. I know that the onlinesubsystemNull only allows LAN connections, but does this plugin allow online matchmaking.

The way I’ve been connecting when I tested (without any onlinesubsystem) is by using the open level node and entering the IP address of the server machine.

Here is a print screen of how I do the joining:

Thanks