Automatic telephony; a comprehensive treatise on automatic and semi-automatic systems (1921)
Smith, Arthur Bessey, b. 1875, Campbell, Wilson Lee · New York : McGraw-Hill · leaf 193
wn in shorthand the conversationwhich occurs. The same restricted monitoring can be had without theswitch by using a tap taken off the telephone line. 9. DICTATION SERVICE It is a frequent occurrence for a man who is out somewhere in theplant to call up his own office and dictate letters or… … EdisonPhonoqraph Fig. 166.—Phonograph to answer a telephone call (circuit). First, there is a phonograph on which is recorded the record which itis desired that the calling person shall hear. It may be, say that themanager is out and will return after lunch, or it may direct that the callerdial…
Telephone
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