PRELIMINARY DESIGN REQUIREMENTS ARGONNE BOILING REACTOR (ARBOR) FACILITY. Revision I Page: 87 of 161
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jacks in the plant corresponding to the same circuit and converse. Four of
the circuits should be amplified, and two of the circuits should be sound-
powered. No ringing devices will be necessary with this system.
c. Bell System Telephones - Four trunk lines shall enter
the ARBOR site. Instruments having illuminated push-buttons for each of
the four trunk lines plus a "hold" button shall be placed on the High Bay
Area operating floor, the Auxiliary Equipment Area, the laboratory room
in the Control Building basement, the control room, and near the main
entrance. Only those instruments in the Control Building shall ring with
incoming calls. The instrument in the control room shall be equipped with
a microphone and loudspeaker arrangement to permit telephone operation
without lifting the regular instrument receiver, if desired.
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Fromm, L.W.; Bernsen, S.A.; Bullinger, C.F. & Matousek, J.F. PRELIMINARY DESIGN REQUIREMENTS ARGONNE BOILING REACTOR (ARBOR) FACILITY. Revision I, report, July 15, 1957; Lemont, Illinois. (https://digital.library.unt.edu/ark:/67531/metadc1023272/m1/87/: accessed March 23, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.