SINCE February 1949, the Western Union Telegraph Company has installed main office facsimile concentrator apparatus and associated patrons' telefax equipment in eight cities: Atlanta, Cincinnati, Dallas, Houston, Los Angeles, New York, Philadelphia, and San Francisco. Some 1,900 patrons, using the new Desk-Fax transceivers,^1,2 are connected to the nearest telegraph office. The multiline concentrator apparatus designed for this service consists of one or more concentrator operating tables (Figure 1) each with a 50-line turret, and one apparatus cabinet, located in a less busy section of the floor, for every two operating tables.

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multiline concentrator apparatus

Breyfogel, A. W. Hagkenberg, J. H. Hallden, F. G.,.Multiline concentrator apparatus. 69 (5),406-408.

Breyfogel, A. W. Hagkenberg, J. H. Hallden, F. G.,"Multiline concentrator apparatus" 69

Breyfogel, A. W. Hagkenberg, J. H. Hallden, F. G.,"Multiline concentrator apparatus"