New Centurylink Modem - wireless network no longer connects to internet

Whenever you replace the modem, or change the Internet Service Provider, you will need to reset the Time Capsule that is connected directly to the new modem or modem/router.

That means a Hard Reset to erase the current network settings and then a new setup so the Time Capsule can pick up new correct settings from the new modem/router. You can use the same device name for the Time Capsule and use the same wireless network name and password that you used before if you wish. A Hard Reset will not affect any of the data that is stored on the Time Capsule hard disk.

To perform a Hard Reset, power on the Time Capsule for a minute or two

Hold in the reset button on the back of the Time Capsule for 7-8 seconds, then release

Allow a full minute for the Time Capsule to restart to a slow blinking amber light status

Since the second Time Capsule will be connected to the first Time Capsule, it should not be necessary to reset the second Time Capsule, but you will need to power off both Time Capsules and then restart again once the first Time Capsule is up and running correctly.

So, the plan would look something like this:

Power off the second Time Capsule and leave it off for now

Reset the first Time Capsule that will connect to the modem/router back to default settings using a Hard Reset

Set up the first Time Capsule and test to make sure that everything is working correctly

Power off the first Time Capsule, wait a minute, then power it back up again

Power up the second Time Capsule