Interrogation device

Details Interrogation device Interrogation device

H - Electricity

04

M

379/8

H04M 11/00 (2006.01) H04M 11/04 (2006.01)

Patent

CA 1208384

ABSTRACT OF THE DISCLOSURE An interrogation unit for connecting into an installation via sensing elements connected to sense required information in the installation, the inter- rogation unit has signal supplying generators for supplying signals indicative of the condition of each of various sensors in the installation, and a trigger circuit activatable upon receipt of a request signal to transmit signals for each of the sensors in turn, the unit can be used with a national telephone network and the unit can be connected to, for example, a factory so that the condition of equipment at the factory can be monitored.

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