BSTJ 1: 1. July 1922: Philadelphia-Pittsburgh Section of the New York-Chicago Cable. (Pilliod, James J.) (1922)
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diller in Journal of A. I. E. E., February, 1921. 84 BELL SYSTEM TECHNICAL JOURNAL be systematically arranged and facilities provided for making quickchanges in the circuit arrangement. The circuits are wired throughjacks installed in groups in test boards for this purpose and to facilitatetesting.… … Fig. 28—Test Boards number of positions. A position is three feet in length,each position bears a number. Stations and Power Plants In Fig. 28 Telephone repeaters of either the two-wire or four-wire type arcconnected to the circuits at approximate intervals of either 50 or 100miles, depending upon…
Cable · Circuits · Circuit · Repeaters · Repeater · Coils · Loading · Telephone · Pittsburgh · Aerial · Loading coils · Telephone circuits · Technical journal · Telephone repeaters · System technical · Pole lines · Loading coil · Aerial wire · Bell system · Test boards
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