To get back to the original original question, it turns out that the router was not the issue, but the DSL modem and/or the phone line were. To make a long story short, even a new AT&T modem required 1-1/2 hours of telephone tech support.

Apparently only dynamic IP addresses are issued for regular home use. Consequently, the modem set-up assumes this is the case. My static IP address required a bump up to a Level 2 tech (how many levels are there?) who had to trace wiring set-ups on his end, do some voodoo and then verify that my new modem was in pass through mode. He said he gets a call like this once every two or three months and welcomed the variety.

So if you have a static IP address, there could be issues with the newer hardware.


On a Mac since 1984.
Currently: 24" M1 iMac, M2 Pro Mac mini with 27" BenQ monitor, M2 Macbook Air, MacOS 14.x; iPhones, iPods (yes, still) and iPads.