Caller controllable incoming telephone call signalling device

Details Caller controllable incoming telephone call signalling device Caller controllable incoming telephone call signalling device

H - Electricity

04

M

H04M 11/02 (2006.01)

Patent

CA 2066505

ABSTRACT OF THE DISCLOSURE A device which is adapted to be connected to a telephone line and which produces instead of the conventional ringing sound for indicating an incoming call any one of a number of predetermined patterns of output signals. The device includes a ring detector for detecting incoming ringing signals on the telephone line and outputting a ring detect signal in response to the ringing signals to a controller, a memory device for storing an operating program for the device along with a prompt signal pattern and a plurality of different signal indicating patterns, a hook switch for sending a signal out over the telephone line when instructed to do so by the controller which causes the incoming ringing signal to be terminated, a DC voltage sensor for sensing the DC voltage of the telephone line, a prompt generator for sending the ring back signal back out on the telephone line, the prompt signal being slightly different from a conventional ring back signal and an electrically actuated signal indicator emitting a preselected output signal pattern indicating an incoming call. In the absence of a DTMF signal, the signal indicator will output a preselected one of the output signal patterns. On hearing the ring back signal the caller may, (if he so desires), send a DTMF tone signal over the line to the device. A DTMF decoder receives and decodes the DTMF tone signal and sends corresponding data signals to the controller. The controller in turn causes the signal indicator to emit a particular pattern of signals, the particular pattern being obtained from the memory device and being the pattern assigned to the particular DTMF tone signal that is sent by the caller. As can be appreciated, each output signal pattern may be used to indicate an incoming call to a different person in the callee's household.

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