Methods of Communication Adapted to Forest Protection

Cover Methods of Communication Adapted to Forest Protection
Methods of Communication Adapted to Forest Protection
Canada Forestry Branch
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Although this is not so much the result of their resis- tance as it is of the impedance resulting from the peculiar construction of these coils, it is thoroughly effective in confining the talking current to the line and preventing leakage to the ground through the bells which are, as stated, continuously in circuit on all instruments. The importance, however, of having all coils of the same resistance will be evident, since the introduction of a low-resistance 'bell will divert to the ground a...n excess amount of current to the detriment of all other instruments on the line. CHAPTER XV OPERATION Section 88 Operating Rules On every telephone system there should be a definite set of rules to govern the operation of the lines and stations. These are usually very simple and should be made up in the form of a printed or typewritten card and fastened to the wall close beside the instrument, or directly over it on the post or tree support in case of out- door stations. This card should also contain a complete list of all stations and call signals on the line and directions for getting connections through central switching 1 stations to other lines if necessary.

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