Telecommunications

Details Telecommunications Telecommunications

H - Electricity

04

M

H04M 9/00 (2006.01) H04M 1/665 (2006.01) H04M 1/725 (2006.01)

Patent

CA 2130111

2130111 9414271 PCTABS00032 The figure shows generally (at 10) a telephone having a speaker (11), a microphone (12), processing means (13), a control unit (14) and an audible indicator (15). When the telephone (10) is used to conventionally communicate with another telephone (not shown), for example to enable respective users of the telephone to speak to each other, electronic signals corresponding to the speech are input to and output from the telephone (10) at input (16) and output (17) respectively. The input (16) and output (17) are connected to a radio transmitter/receiver in the case of a mobile or portable telephone or may be connected to a telephone line cable in the case of a conventional telephone. The processing means (13) electronically processes the signals and in the case of incoming calls these are relayed from the input (16) to the speaker (11). In the case of outgoing signals these are relayed from the microphone (12) to the output (17). The control unit (14) identifies the presence of a command signal with the incoming calls. If a user of another telephone (not shown) wishes to call telephone (10), the telephone number of telephone (10) is dialled in the conventional way. However if during a time interval of a predetermined length beginning immediately after the number of telephone (10) is dialled the caller inputs a command code via his conventional telephone key-pad, this sends a command signal to telephone (10) which is identified by a control unit (14). Upon identification of the command signal the control unit (14) inhibits the operation of the audible indicator (15) by means of inhibit unit (14b) so that no indication is made of the incoming call. Additionally the control unit (14) automatically establishes the channel of communications as though the user had answered the call.

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