I converted from cable landline to Ooma a while ago, no problem. Currently, I’m in the 14 day trial period with the 5G Gateway. Everything, except Ooma, is working well. When I plug Ooma into the gateway, Ooma never successfully connects. When I plug my router into the gateway and Ooma into the router, Ooma connects. I’ve read several things that suggest I need to modify several port settings in my firewall or modem, but can find no method to modify these settings in the gateway. And, I’d think that going through the router wouldn’t change any of that. I can live with the router solution, but would rather eliminate an extra point if failure in my home network.