Modern Fire Alarm Signalling

Issue 2 and Volume 80.

Modern Fire Alarm Signalling P. B. X. Switchboards and Test Sets—Description—Some of the Common Troubles and Remedies THIS is the eighteenth of a series of articles on the care, installation and repair of various phases of fire alarm work. The author has had practical experience in this field, and he will answer questions on this subject that are submitted to him by the readers, free of charge. The only condition is that a stamped envelope must be enclosed for reply. Description As the telephone installing the P. B. X. telephone switchboard generally takes care of the installation and repair we will in this article simply cover the operation and care of the desk, so as to give the men not familiar with the operation of the unit, a good knowledge of its use and care. Different telephone companies have various types and sizes of switchboards but the general layout is…

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