Ahhh, the fun of 1A2....
This is a long process but here is the short version:
A 25 pair cable runs from the site of the telephone (this has an amp connector at the telephone end) back to a central location and is "punched" onto a block such as a 66M1-50.
There are "punch blocks" within the KSU. The "cross connect" wiring connects the KSU blocks to the 66 blocks that have the telephone cables attached. Thereby the name "cross connect field".
As for the CO feeder, it goes onto the KSU punch block to feed the DT to the KSU...through the KTUs, and out to the KSU punch blocks to the telephone punch blocks then through the 25 pair cable to the amp connector to the telephone cable tail into the telephone.
As for the buzzer leads...I am not familiar with NT 564 but most 564 have pairs "spared out" for the attachment of the buzzer leads. They go where they need to depending on the use...intercom, common audible, or direct line buzzer.
You really need to learn the basics here before jumping into the optional features.
Have a good time....
