I found a message about this page, but it was not answered fully, and I am having the same problem as that user.
The instructions found online for swapping in a new cable modem with Cox indicates that the first step is to go to cox.com/swap to inform Cox of your intentions to change modems. Entering that page in a browser takes you to https://www.cox.com/residential/home.html. Where is cox.com/swap, and if it does not exist, (a) why are these instructions still on the Cox site, and (b) are there up-to-date instructions on swapping in a new modem? Thanks.