MURRAY MULTIPLEX.

Dominion, Volume 7, Issue 2123, 15 April 1914, Page 8

MURRAY MULTIPLEX.

ADOPTED IN NEW ZEALAND. Tho Hon. It. Hcaton Rhodes (Post-master-General) informed a Dominion reporter yesterday that in order to increase tho capacity of some of the main telegraph routes of the Dominion and tho cables across Cook Strait, the Post and Telegraph Department intended to purchase and install at Auckland, Wellington, and Christchurch that modern printing telegraphic appliance, tho Murray multiplex. Cabinet, at its Jast meeting, Mr. Rhodes added, . had authorised the necessary expenditure.

"The Murray multiplex," ho coti tinned, "can bo styled the best telegraph apparatus that exists, when all aspects of telegraph work aro considered. Tho principal featuros of the system are: —A typewriter perforator is employed to prepare tape, which is fed into the transmitter, as the tape passes through the transmitter it may be automatically wound on a roller, and serves as a record. Tho speed of transmission irom each perforator is forty-words a minute, and can bo increased to oven sixty words. Any person who can typewrite can prcparo tho tape. By the adoption of tho Murray multiplex it is hoped to.be ablo to work three channels, Auckland to Wellington, and three between Wellington and Christchurch. By channel is meant a duplex exchange of Threo channels, thorofore, mean six pairs of men, threo perforating and three attending to the received work at each end. "Each channel should be capable of dealing with eighty to one hundred messages each way per hour, totalling from 240 to 300 messages sent from each end ■of a circuit, consisting of oho wire or n. total of. say, 500 messages an hour. The receiving'apparatus is nlso capable of perforating automatically, thereby saving hand perforating for re-transmit-ting purposes. Thus messages from Auckland for Cliristphurch would.' bo transmitted by Wellington without; requiring to bo hand perforated, a great saving in timo and labour. At the received end tho messages aro page-print-ed in a similar manner to typo-written work, and are ready_ for dispatching 'mmediatelv upon receipt. "By tho installation of this system it is expected that other main circuits will lie relieved of work they now enrry, and be availablo for use for wayside <t through work, as required."