antique telephone question

[jbivy]

So its barely summer and im already planning for winter. My shop is a good 100 yards from my back door and with my knee, thats quite a walk, especially with snow. So I was thinking about using two antique phones to connect the house and my shop. Luckily ive a fence that runs right by both, i think ill use that to string the wire.

Ive found out how to connect them, intercom style. But to ring it says it takes 90v? I didnt realize that much power ran through phone lines, but supposedly only 6 volts to use them like intercoms. So how do i modify these so that the ringer works?

Truth be told.. since i put the heater in my shop, a tv and a rather comfy couch, ive been spending more than a few "working" hours out there just comfortabley dozing away. So I think ill need the ringer to wake me up.