Wes wrote:

"Pete C." wrote:

Do a DC side UPS for 12V stuff like the modem. Battery charger and
battery really, since all the devices taking 12V have their own
regulators.

Darn thing uses 18 vac.

Wes

Yuck. Open the modem, find the output after the regulator and add a
hefty capacitor so it can ride through the small glitch.