no dial tone after new gateway

Was shipped a new gateway, I installed it exactly the same way as the previous one, and followed the instructions, but I have no dial tone on the landline phone.

I have a plain old telephone plugged directly into the modem. Known good phone and cable assembly, as they were working fine on the previous gateway.

I try to use the xfinity app or AI, but I just get caught in a death loop. I se no obvious access to classical tech support.

I have gone through this swap process multiple times, but this is the first time I lost phone service.

Is Comcast making a change and recommending VOIP phones?