Xfinity triple play requires new modem?

I have a Motorola model surfboard SB6120 I bought to use with the airport. Now I upgraded to Triple Play and Comcast told me I need a new modem or the service will not work. Is this correct? I assumed that if I buy the ARIS they recommend so I no longer need Airport?
I read the reviews of the modem that it was difficult to set up etc and don't want to buy a new modem, if I don't have to do.

I know just enough to know that I don't know about all that stuff. So in your reply, would you mind ' dumbing down there? " Thank you!

Susan

Comcast told me I need a new modem or the service will not work. Is this correct?

That would be a question of Comcast with Apple support.

I assumed that if I buy the ARIS they recommend so I no longer need Airport?

What model number of the Arris product they recommend?  (Arris offers more than a dozen different products)

If you get a 'simple' modem, as the SB6120 you have now with only a single Ethernet port at the back of the unit, then you will always need airport to act as a router.

If they recommend a type of device that combines a separate modem and a router separate in the same package, then you are probably the most convenient airport... but you can still use it if you want to "modem/router" or "gateway".

You have two wireless in this way, you may not need.  Some users use a network to their 'private' network and then use another wireless for the 'guests'... so it does not give the password to your private network.

Tags: Wireless

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