Compatibility with Ooma Telo

I’m looking for a combo modem and router to replace an ARRIS TG1672G that I have from Spectrum. They say I need to upgrade my equipment but no longer offer any combo devices. I need the combo due to very limited space on my desk. My Ooma Telo currently connects directly to the TG1672G with a ribbon style ethernet cable. I’ve looked at the G18, G20 and G34 “Wi-Fi Cable Modems” on the surfboard website but under “Digital Voice Service Capability” they all say “NO”. I interpret this as meaning I couldn’t use the Ooma Telo with any of them. Am I correct or just misunderstanding the terminology? I believe Ooma Telo varies from other VoIP services like Spectrum’s own service, I certainly don’t understand the technical aspects of either. If a moderator or other in the know person could clarify this for me it will be very much appreciated. Thank You!