Electrical communication systems engineering - USA Voorschrift, Technical Manual, 11-486 Facsimile equipment RC-120, Rc-120-A an RC-120-B, and facsimile set AN/TXC-1 - USA Voorschrift, Technical Manual, 11-375B Telegraph central office set TC-3 and switchboard BD-100 - USA Voorschrift, Technical Manual, 11-358 Common-battery telephone equipment - USA Voorschrift, Technical Manual, 11-458 Principles of long distance telephone and telegraph transmission - USA Voorschrift, Technical Manual, 11-475 Carrier terminal OA-13/FC, carrier repeater OA-10/FC, and carrier filter F-36/FC (type H carrier telephone packaged equipment) - USA Voorschrift, Technical Manual, 11-2025 Signal communication equipment directory : radio communication equipment - USA Voorschrift, Technical Manual, 11-227 Public address equipment PA-4-C - USA Voorschrift, Technical Manual, 11-435 Local-battery telephone equipment - USA Voorschrift, Technical Manual, 11-457 Signal Corps : Fixed signal communication systems - USA Voorschrift, Army Regulations, No. 105-20 Line units BE-77, BE-77-A and BE-77-B - USA Voorschrift, Technical Manual, 11-359 Complete 100-mile spiral-four carrier system - USA Voorschrift, Technical Manual, 11-2001
