CM 1150 Question

Trying to help a friend who wishes to 'cut the cable'. Want to be sure of advice and hardware compatibility and dependability before advising/setting them up (they will not be able to trouble shoot). They have to keep phone to get best internet price (huge difference). Told them they'd supply their own hardware. If the provider lists the CM1100 as being commutable, may one assume the 1150 would be so also? 

Thanks.