Handbook on the Construction of the USFS Telephone System
Description:
The purposes of the handbook are: First, to set forth certain broad policies; second, to describe certain Approved types of telephone construction and maintenance (including installation of instruments) and to establish standard specifications for the more important types; third, to explain briefly the fundamental principles involved in the operation of telephone lines and instruments; fourth, to furnish instructions for locating and clearing trouble; and fifth, to describe special methods used and practices followed in different districts which are adaptable to the varying field conditions.
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