The telephone system of the British post office. A practical handbook (1901)
Herbert, Thomas Ernest · London, New York, Whittaker and Co. · leaf 165
used for through wires, counter-cabinet, and such-like circuits.The Junctions and service wires take up two rows, and thus there are onlyten positions left for the trunks (i.e., the equipment of two sections). Theextreme left hand and extreme right hand strips are therefore devoted totrunk lines.… … Figure 124. right strip at the right hand side accommodates the wires from sec-tion II. If there are forty sections to be accommodated, then the extremeright and left strips of each test tablet will be marked consecutively,section I. to XL. To take a case in point, let us suppose that we have to…
Telephone · Postal service
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