A:AnswerNo, Nellie. The Linksys EA8300 is designed to be connected to a modem that supports Ethernet connection. It doesn't have a phone jack and you cannot hook up a landline phone with it.
A:AnswerYes, the AC2200 router will work with Spectrum internet. It doesn't have a cable connection but you can connect it to the modem's ethernet port to get it online.
A:AnswerYes it is compatible and might I add works great. To connect the two just press the WPS button on the router, then within 2 mins press the WPS button on the Repeater. Then you should see it in the Linksys smart hub.
Justin
A:AnswerI have approx. 11 devices on my wireless net at the house. I've had no issues with streaming or buffering. Granted, not all 11 communicate at the same time, but I believe this unit can fulfill most homeowners needs.