Abstract: Control means of an exchange comprising connection means for accommodating a telephone and the control means for controlling the accommodated telephone, receives a dial signal from the telephone without causing the telephone to respond to an incoming call when the telephone that is performing incoming call ringing is hooked off, causes the hooked-off telephone to respond to the incoming call when the received dial signal is a first dial signal, and causes the telephone as a call source to make a call without causing the hooked-off telephone to respond to the incoming call when the received dial signal is a second dial signal. Thereby, it is possible to make a call even during incoming call ringing.

Abstract: A computer-implemented method includes generating a first signal; generating vibrations in a mobile device based on the first signal; and sensing, using a microphone associated with the mobile device, sound generated by the vibrations. The method further includes generating an output based on the sound sensed by the microphone, measuring a level of the sound based on the output, and detecting a resonant frequency of the mobile device based on the level of the sound.

Abstract: A method for screening and routing incoming telephone calls includes extracting caller identification information from an incoming telephone call, providing a plurality of tables including a primary ring table, a secondary ring table, a voicemail table, a block call table, and a forward call table, and determining which one of the plurality of tables includes the caller identification information. The method also includes allowing the incoming telephone call to have a primary ring tone if the primary ring table includes the caller identification information, and allowing the incoming telephone call to have a secondary ring tone if the secondary ring table includes the caller identification information.

Abstract: A telephone subscriber system comprising a speech circuit and a ring circuit adapted to be integrated monolithically to a semiconductor material substrate and being coupled to a telephone subscriber line, respectively through first and second circuit switch of the diode bridge type, further comprises a first circuit changeover switch, under control by the user, which drives at least second and third circuit switching means connected between the first diode bridge circuit and the speech circuit. The third circuit changeover switch is connected to the speech and ring circuits at a circuit communication node which forms the system point of reference, physically coincident with the substrate. The system includes a circuit interface means for controlling the second and third circuit changeover switch by external electrical signals which are related to the circuit communication node.

Abstract: The telephone line has a multiple ringing patterns capacity, and the apparatus couples the telephone line to the telephone line subscriber device when a particular one of the ringing patterns is present at the telephone line. The particular ringing pattern consists of at least two ringing bursts separated by a gap which is equal to or less than a predetermined time interval. The apparatus includes logic circuitry which is set by the first burst and which, when the gap between the first burst and the second burst is equal to or less than the time interval, effects a low resistance path between an input jack and an output jack of the apparatus. The input jack is connectable to a wall socket for the telephone line, and the output jack is connectable to a socket on the telephone subscriber device. Preferably, the telephone subscriber device is a telefax machine.

Abstract: A ring detection device adapted to be connected in a telephone line to a telephone or telephone device. The device includes circuitry for distinguishing between several differently encoded telephone ring signals and enabling and/or maintaining disablement of the telephone or telephone device to which it is connected based upon such distinction. The device includes a switch for selecting which of the incoming telephone ring signals the telephone or telephone device to which is it connected is enabled.

Abstract: A terminal connection device changes and connects a plurality of terminals to one telephone line according to kinds of ringing signal sequences sent through the telephone line. The terminal connection device comprises switches connecting between the telephone line and the terminals, a control circuit commanding ON/OFF operation of the switches, and a photo coupler converting the ringing signal obtained through the telephone line into light signal and inputting the light signal to the control circuit. The control circuit includes a device for judging as to whether a ringing signal sequence sent through the telephone line is the same as the sequence data or not.

Abstract: An automated telephone answering system with plug-in tone responsive unit at each of a plurality of extensions, a central answering unit responds to a caller initiated, telephone company generated, ring signal on the telephone line and establishes a connection with the calling phone. Each of the remote units responds to a different predetermined, selectable tone frequency. When the caller pushes a key on a standard Touch Tone phone key pad to select a specific extension, the responding remote unit generates a ringing signal for that extension. If the telephone line has an on-hook status, the system has means that prevents response to further tone signals.

Abstract: With a plug-in tone responsive unit at each extension, a central answering unit responds to a caller initiated, telephone company generated, ring signal on the telephone line and establishes a connection with the calling phone. Each of the remote units responds to a different predetermined tone frequency. When the caller pushes a key on a standard Touch Tone phone key pad to select a specific extension, the responding remote unit generates a ringing signal for that extension.

Abstract: A party-like telephone line with plural numbers having distinguishable ringing signals on a single line is automatically connected to a facsimile or other telephone connected device for receiving incoming messages upon sensing a predetermined ring sequence with an interface, counter, timers, and comparator.

Abstract: A telephone subscriber interface device provides privacy on a party line. The device provides for revertive calling, break-in, automatic disconnect, selective ringing, automatic number identification, and operates on the central office power supply. The device provides the following features: A connect state for the PLC in which the PLC is connected to the telephone line but in which the PLC is not responsive to other inputs, a ring decoder which detects either divided coded ringing signals or divided ringing signals in a novel manner, means for testing whether a revertive call has been properly terminated, a low power switch so that the PLC can run on telephone line power only without battery backup, and means for resetting the PLC to a ready state in the absence of other inputs.

Abstract: A frequency responsive selective ringing circuit detects a selected one of a plurality of frequency-distinctive ringing signals applied on either the tip or ring conductors of a telephone line, distinguishes between the respectively different frequencies on a rapid cycle-by-cycle basis, and either applies the ringing signal to telephone equipment to ring the telephone equipment if the ringing signal is one which is selected, or rectifies the ringing signal and applies the rectified DC signal to the ringing circuit of the telephone equipment. The rectified DC signal will not ring the telephone because the DC signal is not conducted through a capacitor in the ringing circuit of the telephone equipment.

Abstract: An apparatus adapted to be coupled into a party telephone line for selecting a ringing signal transmitted on the line from among a plurality of possible coded ringing signals that could be transmitted on the line and for coupling the ringing signal to a telephone is disclosed. The apparatus comprises a rectifier coupled to the party line for providing a rectified ringing signal, a first switch having the rectified signal as an input for reversing the polarity of the rectified signal at selected times, a second switch coupled to the first switch for selecting either the rectified ringing signal or the ringing signal itself and a third switch coupled to the second switch for coupling the selected signal to a telephone coupled to the third switch.

Abstract: A device for selectively ringing a specific party in a multiparty telephone system by frequency discrimination including a remotely actuable solid state switch connected in series with the telephone circuit of each customer. A programmable frequency discriminator is connected across the customer's telephone circuit for opening the solid state switch in response to a ringing voltage. A frequency discriminator produces an output signal in response to the ringing voltage of a selected frequency preprogrammed into the discriminator. The output of the frequency discriminator is connected to an AC to DC to AC converting circuit which is connected within the customer's telephone circuit. The frequency discriminator enables the converting circuit which thereby converts the frequency of the ringing voltage to a standard 20 Hz for ringing the customer's phone.

Abstract: A frequency selective ringer circuit which utilizes a constant current source in conjunction with an array of resistors and switches for developing a frequency selective window with which to detect an incoming frequency at the tip and ring inputs of a telephone system. The incoming frequency is doubled and converted to a d.c. level which is utilized as the converted level which is evaluated by the circuit. Where the converted voltage level falls within the established window, a drive circuit is energized for actuating a transducer such as a piezoelectric crystal or loudspeaker. Frequency selection is made by the simple expedient of closing one of a plurality of SPST switches. The circuit also may include a circuit for automatically deactivating the mechanical bell of an existing telephone set without the removal thereof.