SECTION I GENERAL 1. Purpose The purpose of this publication is to provide a reference manual of methods and practices used in the installation and maintenance of telephone substations. 2. Scope It is impractical to include in this manual information covering all the conditions that are encountered by a substation installer; there fore, only those methods and practices in common use are covered. The material is presented under seven section headings: General, Outside Installation, Station Protection, Inside Installation, Station Wiring Plans, Special Equipment, and Supplementary Data. Appropriate Bell System Practices have been used in the preparation of this manual. 3. Terminology Common terms and their definitions follow: a. AERIAL. Cable or wire construction suspended above the ground surface. b. ARMOR.
DesignationTM 11-474
EditionJun 1944
StatusSuperseded
Pages111
FunctionComms Signal
CollectionHistoric
Public domain (U.S. Government work)