the forums have different information. Some say the isp has to enable it (see link), others that you can turn it on through the settings, and others that it just works by adding a compatible adapter. 

‎How to enable MoCa on Aaris SVG2482AC Modem/router? | Xfinity Community Forum

I don’t have one so I can’t test it. 

Thanks...I checked the panels when I logged into my router but couldn't find it anywhere...I’ll give comcast a call and see what they say..I do own my router which I purchased. Been checking on how to use Moca Adapters..If I can get comcast to enable this feature then I would ONLY need one. We will see..

if you’re investing in moca, might be worth the little extra for a pair versus one. then if one works with the modem, you have a spare for elsewhere. Plus if it doesn’t, then you have the pair of them. 

I’ve seen the 2.5gig moca adapters used and they’re pretty darned fast. 

Thanks