Folder 200 - 289 Divisions - Switching Systems
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Categories
Folder 226 Division - Step-by-Step, Community Dial Office
Equipment Common to More Than One Type Step-By-Step and Community Dial Office
Folder 227 Division - Gen'l & Testing Info
General and Testing Information Applying to Intertoll Dialing, CAMA, AMA, ANI, "Touch-Tone" Calling, and Common Control Equipment Step-By-Step Systems
Folder 252 Division - Traffic Mgmt Systems
Traffic Management Systems
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