{"product_id":"u-s-army-signal-corps-manual-set-tm-11-2114-tm-11-2115-1949-1950","title":"U.S. Army Signal Corps Manual Set – TM 11-2114 \u0026 TM 11-2115 (1949–1950)","description":"\u003cp\u003e\u003cspan\u003eStepping Switch Test Set + Crash \u0026amp; Conference Equipment – Central Office Systems\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOffered here is a matched pair of original U.S. Army Technical Manuals covering early military telephone switching systems. These manuals document the operation, testing, and control of step-by-step (Strowger-type) central office equipment, which formed the backbone of WWII and early Cold War communications networks.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis is a complete, complementary set, with one manual focused on testing and maintenance, and the other on operational control features such as conference calling and priority override (“crash”) systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIncluded Manuals:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTM 11-2114 (June 1949)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eStepping-Switch Test Set – Step-by-Step Dial Central Office Equipment\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eCovers testing, calibration, and troubleshooting\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIncludes detailed wiring diagrams and procedures\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTM 11-2115 (March 1950)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCrash and Conference Equipment – Step-by-Step Dial Central Office Equipment\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eCovers multi-line conference systems\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIncludes priority override (“crash”) circuit operation\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFocuses on operator control and switching functions\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eHistorical Significance:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThese manuals represent the core of U.S. Army Signal Corps communications infrastructure in the immediate post-WWII era. Systems like these were used in:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eMilitary bases and command centers\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEarly telephone exchanges\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAir defense and operations coordination environments\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003cspan\u003eThis set is well suited for collectors of military communications, Signal Corps equipment, and early telecommunications history.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCondition:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eBoth manuals are complete and intact\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLight age-related wear and toning to covers\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eClean, readable interiors\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNo major damage observed\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCollector Appeal:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eOriginal government-issued manuals\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMatching system coverage (test and operation)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIdeal for display or pairing with vintage communications equipment\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eStrong foundation for a larger central office documentation set\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOpen to reasonable offers\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Whiskey Rebellion Antiques","offers":[{"title":"Default Title","offer_id":42866590842957,"sku":null,"price":120.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/9229\/8829\/files\/9194FB6A-2511-40A3-8C2E-5537DE6B6E72.jpg?v=1776088627","url":"https:\/\/whiskeyrebellionantiques.com\/products\/u-s-army-signal-corps-manual-set-tm-11-2114-tm-11-2115-1949-1950","provider":"Whiskey Rebellion Antiques","version":"1.0","type":"link"}