sundance-communications.com/forum Forums Other TDM Phone Systems 1A2 and Comkey Telephones & Systems 1A KTU's

I finally found my 1A KTU's for my old WE 444, I know other KTU's were required for the lamps, but don't know which one, can anyone help out with that information. Thanks in advance

The 6B/C was the relay used for lamps. The 19B was for Flashing Lamp Indication.

Sam

Thanks Sam, now to dig around and see if I can find any, and the diagrams.

I've got the diagrams (BSP) of the individual KTU's. But not the old ones that show all the interconnections. Let me know if you need them faxed.

I may have a 6b in the dreaded basement. Let me know if you're interested and I'll look.

Sam

Here is a copy of a circuit out of one of my old manuals I still have. Its sort of hard to read the good prints I thru out years ago. Maybe this will help. It mentions a 33KTU for wink hold lamps

Thanks for posting the diagram.

I haven't come across the 6b yet but dug out a 2A KTU in a 105 box, looks like it had 4 wires attached. What purpose did the 2A serve?

Thanks again for all the info.

I do believe that the 2A was an intercom circuit. Essentially it was the 1A equivalent of a 401 card.

Sam

You're right Sam it was a battery feed ckt for manual I/C.

Thanks for the replies. Those old 1A items I have came out of my fathers insurance office they had been hanging on the wall since the 50's. Everything was mounted in 2 105 boxes (1A & 6B/C KTU's in one and the 2A in the other)still haven't found the 6 yet. I can't believe a 1A system with 1 line (phone number was 58R) and an intercom.