pdf SXS - Plant Training - NJB - 355 CDO - 1950 - Legends Popular
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SXS-Plant_Training_NJB_355_CDO_1950_Legends.pdf
Legends for the training book produced by a New Jersey Bell employee that contains schematics and sequence charts for circuits encountered in a 355 Community Dial Office (CDO). Good reference for several SxS training documents in the Library. Scanned by Martin Harriss from an original supplied by Charlie Dunne.
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