Evening Republican, Volume 22, Number 77, Rensselaer, Jasper County, 2 April 1919 — Multiplies Capacity of Phone Wires. [ARTICLE]

Multiplies Capacity of Phone Wires.

An achievement more extraordinary by far than making two blades of grass grow where one grew before, is the sending for five telephone conversations simultaneously over one pair of wires where but One conversation could travel before, says Popular Mechanics Magazine. The new invention also makes it possible to send 40 telegraph messages, one pair of wires, or they can be used in part for telephoning and in part for telegraphing. Teh conversations can be carried on over two pairs of wires which formerly could be used for a maximum of three conversations by means of the so-called “phantom circuit.”' Tests covering several weeks have been made of the system on a Baltimore-Pittsburg line and have been pronounced successful in every way.