Southwestern Bell Telephone

Boyd Dorsey

Arthur O Miller

Roger F Atkinson

Hollis Coleman

A method of providing equal access to a number of long distance carriers in local telephone company office containing No. 5 crossbar switching machines. Calls are intercepted between the line link frame and the originating registers. If the call is a long distance call, a serial number which resembles a conventional phone call is inserted in the calls place. The called number is stored and the appropriate carrier is determined by locating the calling party's pre-selected carrier choice in telephone company records. When the call identified by the serial number exits the switch it is automatically routed to the correct long distance carrier.

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Mabelvale, AR, United States of America

Boyd Dorsey