Ed said: ...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. It worked well.

I would assume I would need to pull the 551C KSU off the wall to access the backplane to wire as you suggested to the "LF" output?

As a temporary measure, I punched down the coil of the relay to "LG-L" for line 2 on the system 66-block, and put the relay contacts in series with the 118 ring generator. Works very nice, thank you. This scheme of course doesnt use CA for line 1 at all.


Last edited by Stryder; 12/11/12 09:00 PM.