I’m looking to use moca to add an access point and help a friend expand her wifi coverage. Cost is a consideration, and I the cheapest adapter I could find has the following warning:

WARNING: The GCA-1200 CAN be used when the coax cable is not being used (i.e. “Dark Coax”). The GCA-1200 CANNOT be used when the coax cable is being used for Cable TV/Satellite TV Services.

Is this a usual exclusion, or can other MOCA adapters be used on in use coaxial? And does anyone have recommendations for a very reliable adapter? (She won’t know how to reset it if it stops working.)

Thanks for your help!