Pardon my ignorance, but can someone answer a few questions for me?

I am replacing a Nitsuko DTS system, with two modules - one is a 4 CO Line with RJ inputs, and a "12 SCU" module with amphenol connector. My question is, what gender is the amphenol connector of the unit, and what type of station connector is required (2 wire or 4 wire)? Also, is this a digital or an analog system?

Any advise or help would be appreciated.

Yes, I am retired - so why am I still working on phones?