"Years ago, I accomplished double rings by connecting a single pole slave relay that has its coil driven by the interrupter's "LF" output. The contacts on this relay would then switch the "RN" output. The LF and RN cadences were aligned so that it provided a perfect double ring. I just used this switched output to feed the appropriate line cards."

Just when I get cocky and tell myself that I know everything about 1A2, somebody deflates me, you clever rascal, you. I am going out to the barn tomorrow and try this modification on one of my shoeboxes! Where were you when I needed you about thirty years ago?

Last edited by Arthur P. Bloom; 11/22/12 11:37 PM.
Arthur P. Bloom
"30 years of faithful service...15 years on hold"