I thought I'd start another thread here in the Electronics Section. Anyone with expertise, diagrams, sources, reference materials please weigh in here. I will start by posting some of the parts, information and diagrams that I have, but they are offered as thought starters since I have not become a subject matter expert, yet. The Atlas CE-2A-PT beige handset station is an example of the ones I intend to use out on the layout. Atlas also made/makes the WE-2A which has a slightly different hook. The EST 6830-6A Remote Handset red station will be for the dispatcher. The power unit pictured below is a Western Electric SD-81824-01.