Handbook of Telephones of the Signal Corps Us Army
Handbook of Telephones of the Signal Corps Us Army
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In our eReader you can find the full English version of the book. Read Handbook of Telephones of the Signal Corps Us Army Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Handbook of Telephones of the Signal Corps Us Army
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47.
INTERCOMMUNICATING SYSTEMS.
In installations where the total number of instruments does not exceed a dozen or so, there is not sufficient business to warrant the employment of a central- station operator, and yet it is necessary that any one of the dozen stations should be able to call any other one at will, especially when all the instruments are in one building. To supply this need intercommunicating systems have been devised. In the usual type of intercommunicating systems there are as m...any line wires as instruments, plus one common return. All of these wires are connected to every instrument in the system, and the calling of any desired station from any other is done by a selective method of using the circuits.
ERICSSON TELEPHONE COMPANY.
One such system is illustrated in Fig. 48, and is made by the Ericsson Telephone Company. In this plate four sets of instru- ments are shown, two wall and two desk sets, together with the 56 corresponding portion of the twelve circuits. It will be observed that each set is provided with a twelve-point switch, one point for every line circuit, and each set, of course, has one particular number, which is called the home number.
What to read after Handbook of Telephones of the Signal Corps Us Army?
You can find similar books in the "Read Also" column, or choose other free books by United States Army Signal Corps to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
47.
INTERCOMMUNICATING SYSTEMS.
In installations where the total number of instruments does not exceed a dozen or so, there is not sufficient business to warrant the employment of a central- station operator, and yet it is necessary that any one of the dozen stations should be able to call any other one at will, especially when all the instruments are in one building. To supply this need intercommunicating systems have been devised. In the usual type of intercommunicating systems there are as m...any line wires as instruments, plus one common return. All of these wires are connected to every instrument in the system, and the calling of any desired station from any other is done by a selective method of using the circuits.
ERICSSON TELEPHONE COMPANY.
One such system is illustrated in Fig. 48, and is made by the Ericsson Telephone Company. In this plate four sets of instru- ments are shown, two wall and two desk sets, together with the 56 corresponding portion of the twelve circuits. It will be observed that each set is provided with a twelve-point switch, one point for every line circuit, and each set, of course, has one particular number, which is called the home number.
What to read after Handbook of Telephones of the Signal Corps Us Army?
You can find similar books in the "Read Also" column, or choose other free books by United States Army Signal Corps to read onlineMoreLess
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