mux shelves are built from the bottom up

Can't say I remembered the mux as well as I remembered the color code.


We start here. Each circuit is given a location address. MD"xxxx", Muldem "A" , "B", or "C".

Once you locate the muldem you still have seven groups of 4 pairs in each muldem. For example we'll say muldem "A", group 1.

At dispatch we're given the muldem location MDxxxx, A-1-1. Now I know to look in muldem "A", group 1, circuit 1.

Now we can plug into our circuit port, which will cause a light to lght up on another shelf enabling you to identify another shelf that gives you better access to the circuit you're working on.