. Electrical world. ts of circuits and apparatus gives a verysatisfactory service, both from a telegraph and telephone standpoint,and admits of the use of a pair of wires for carrying on intelligencebetween three pairs of parties at the same time, without interference,which very materially increases the earning powers of a long-distanceline. The principle disadvantage of the system is the difficulty ofsecuring suitable signalling apparatus between the telephone oper-ators. Signalling over a composited long-distance line in the ordi-nary way with telephone generator seriously interferes with th
. Electrical world. ts of circuits and apparatus gives a verysatisfactory service, both from a telegraph and telephone standpoint,and admits of the use of a pair of wires for carrying on intelligencebetween three pairs of parties at the same time, without interference,which very materially increases the earning powers of a long-distanceline. The principle disadvantage of the system is the difficulty ofsecuring suitable signalling apparatus between the telephone oper-ators. Signalling over a composited long-distance line in the ordi-nary way with telephone generator seriously interferes with the tele- April 2. 1904. ELECTRICAL WORLD and ENGINEER. 637 graph service and does not signal the distant telephone operator, 60-cycle current is used, there is no interference to the telegraphowing to the comparatively low frequency of the regular generator, service, and the signalling between telephone operators is positiveand the arrangement of the apparatus in the circuit. if a properly designed line drop is
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
