The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 206
SMALL SWITCH-BOARDS iSi convenient type of small switch-board used for C.B. privatebranch extensions. It is intended to stand on a desk or a table. … thus allowing the attendant to carry on clerical work, and yetbe always ready to answer a call, and thus ensure more promptattention than is met with, with ordinary wall sets. 182 PRACTICAL TELEPHONE HANDBOOK The instrument shown is a six-line board, intended for twoexchange lines and four…
Telephone
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