H - Electricity – 04 – M
Patent
H - Electricity
04
M
H04M 15/00 (2006.01)
Patent
CA 2110255
A device for detecting outgoing and received telephone calls and communicating the telephone number and length of call in the case of outgoing calls and the length of call in the case of received calls. The device connects to the standard telephone service to detect telephone calls and communicates information about telephone line activity to an external device.
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