I need some help trying to find a phone flasher for my shop. My shop is wired with a landline phone. It’s connected to 4 other phones in the house. It’s hooked up to ADT with an alarm and a keypad in the shop. Each phone is 1 din. (battery powered) When I started setting up my shop in 2007, Fine Woodworking had an article “Wiring a Workshop”. In the article they had a Telephone Flasher (Fone Flasher 2) . It looked as though the flasher was plugged into an outlet for power. It was from Radio Shack. This flasher is no longer available. The phone flashers I find on Amazon today (Krown PF 200 or the Krown 793) are powered by the phone line. With 5 phones on this single line I am at 5 din. They both say that they are compatible with most phones. Does anybody know whether these flashers will work or are there any suggestions on other phone flashers that actually flash or strobe?