Data processing equipment

Details Data processing equipment Data processing equipment

H - Electricity

04

M

354/35, 344/80.1

H04M 3/60 (2006.01) H04M 15/04 (2006.01)

Patent

CA 1078051

ABSTRACT Data processing equipment suitable for recording details of manually connected telephone calls has a plurality of operator stations with keyboards and VDU's connected in groups to operator's control units which respond to keyed instructions to obtain data from peripheral units storing such data and for recording on magnetic tape cartridge the details of the calls. The magnetic tape cartridge recording units are duplicated and the data recorded in the two units, which would be the same, is compared and their validity checked. If both signals are valid, whether they differ or not, they are recorded. If only one set of signals is valid only the valid signals are recorded by both recorders. A marker signal may be recorded to indicate that the data signals recorded may be incorrect.

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