Our Community Forum will be shutting down on June 27, 2024. Please visit att.com/support for all your support needs.
Need help connecting your router?
JagerBombed19's profile



7 Messages

Thursday, February 20th, 2020 12:40 AM

Install 2nd modem to existing coax port?

I may get yelled at by ATT for asking this but heres my question.

Is it possible to install a second modem (Arris) in an existing coax outlet in my room? And then hook up a router and either set it up to mirror the original (ATT) modem/router SSID and password. In a sense extending the network?

The original (ATT) modem/router is currently in a very secluded room of the house and provides poor internet throughout the entire house unfortunately. Rather than pay ATT to come move it I am looking to see if:
1. I can myself move the ATT modem to a different coax port in the house and strengthen the connection.
2. Do the method above, set up another modem and router in my room to enable a strong connection in my room.

I do HelpDesk for a living so know mostly what I am doing but I do not know how ATT works. When they activate internet (and u-verse tv service) do they activate all coax ports within the house? If so are they activated only for u-verse tv or only internet or both?

I have a wireless tv receiver in my room and have used the ethernet port on the back but the connection is not ideal for large data transfers on my PC.

Is there a way I can set up my router (which supports AP mode) to act as a range extender either with the wireless receiver or the existing ATT wifi WITHOUT having to run a 50ft cat5 from the downstairs modem?

Former Employee


32.9K Messages

4 years ago

only 1 modem can be provisioned per address.

New Member


11 Messages

The gateway should be on cat5e or better ethernet. not coax connection.

Not finding what you're looking for?
New to AT&T Community?
New to the AT&T Community? Start by visiting the Community How-To.
New to the AT&T Community?
Visit the Community How-To.