Abstract: A method of monitoring the sound within a car is disclosed. The occurrence of abnormality indicative of possible auto theft is reported to the driver who is remote from the car by means of the anti-theft system which transmits the occurrence of abnormality to a remote control unit and which turns on the power of the mobile telephone system, so as to make it ready for receiving external calls. The anti-theft system transmits to the driver the sound within the car collected by the microphone of the mobile telephone system, thereby making it possible for the driver at a remote place to ascertain the state of the car.

Abstract: A cordess telephone apparatus with a paper reporting an incoming signal from a parent device or a radio telephone. When the parent device receives a calling signal from a subscriber's line or when a switch is operated at the parent device or the radio telephone, the pager is started by a signal delivered via a radio circuit from the parent device or the radio telephone. The pager is mounted removably on the radio telephone.

Abstract: A cellular radiotelephone autonomous registration method. The radiotelephone attempts registration when a clock count transmitted by the system equals or exceeds the radiotelephone's threshold count (201). The radiotelephone then scans (202) available channels for proper signal strength and attempts to seize that channel (203). If the channel seizure fails, the threshold count is updated with the clock count plus a random integer (207) and the next channel seizure attempt is made when the next master clock value equals or exceeds this value. This method increases the length of time between failed channel seizure attempts, thereby decreasing the load on the radiotelephone's power source.

Abstract: A cordless telephone having a base unit and a plurality of radio telephone sets. The base unit delivers a ringing signal from a telephone line to a radio telephone set which is in telephone communication with a remote subscriber coupled to the telephone network, and a receiving radio telephone set in accordance with a request for transfer by the transferring radio telephone set. If the receiving radio telephone set responds to the ringing signal and goes off-hook, the telephone communication is transferred to the receiving radio telephone set from the transferring radio telephone set. If the receiving radio telephone set does not respond or does not go off-hook, the transferring radio telephone set responds to the ringing signal and goes off-hook to carry on the telephone communication.

Abstract: A Customer Activation System, including a method and apparatus, for expeditiously providing a cellular mobile radiotelephone (CMR) customer access to CMR service. The system includes a regional processor programmed to:accept information identifying the CMR customer;obtain a credit check of the CMR customer;assign a telephone number to the CMR customer; andinsert and activate the telephone number in a cellular switch.

Abstract: A method of supervising the subscribers in a mobile telephone system to detect audulent use of a mobile telephone. A fraudulent subscriber (MS2) can have the same identification number (12) as that (11) of a legitimate subscriber (MS1) and the operator of the system cannot discover the fraudulent use. According to the proposed method, a predetermined sequence of numbers (00, 01, . . .20) is assigned to each mobile telephone in the system. When a call is made by a subscriber across a control channel it is followed by a particular number in the sequence across the allotted voice channel and this order number is recorded in the toll-ticketing records in the mobile switching centre (MSC). When the next call is made from the same subscriber, the next order number is sent and recorded. Thus all the calls from a legitimate subscriber are recorded in a determined sequence.

Abstract: A spatial diversity system for digital mobile telephone networks which comprises at least two antennas, one antenna being part of a primary (or master) unit and the other being part of a diversity (or slave) unit, each unit having processing means to detect the "quality" of digital audio signals received by their respective antennas, the "quality" comprising link quality, AGC level and parity errors; the primary unit being capable of comparing the "quality" of the audio signals received by each antenna, selecting the higher "quality" signal and transmitting the higher "quality" signal to the telephone network.

Abstract: Mobile cellular telephone services are automatically vended through a microprocessor controlled vending machine which inventories a plurality of mobile cellular telephones and selectively delivers one of the phones after reading a credit card number from a customer and obtaining credit card approval. The mobile cellular telephone is dispensed and later returned by the customer. When returned by the customer, the mobile cellular telephone is disposed within a receiving unit which uniquely verifies the mobile cellular telephone through its phone number, reads the usage made by the customer of the mobile telephone, and senses the charged condition of the battery within the mobile telephone. The customer's credit card is again read and the bill for rental of the mobile cellular telephone unit, including all telephone usage charges, is computed and directly billed to the credit card number.

Abstract: Disclosed is a method of locking the functions of a mobile telephone system. At least two lock codes are stored in a memory together with the functions to be kept locked or actuated when the locked state of the mobile system is released. The locked state of the automobile is not released unless a registered lock code is input. When the locked state is released by inputting one of the registered lock codes, some functions remain in the locked state in accordance with the input lock code, while other functions are actuated. Thus it is possible to limit the use of the mobile telephone system depending upon who drives the car.

Abstract: An interface (10) is disclosed for coupling a conventional pay station telephone (12) to a telephone switching system (16). The interface (10) provides supervision signal detection functions normally provided by a switching system, and thus can be connected thereto by a less costly business line (28). The interface includes processor controlled tone generators (72, 76) and detectors (73, 74, 81, 106, 108) for detecting tones and voltages transmitted by either the telephone (12) or the switching system (16). The interface (10) further includes a detector (106) and a procedure (FIG. 8) for providing an answer call indication. Coin collection or return is controlled by the interface (10) depending on the status of the call which is also determined by the interface (10). Further, a fail-safe relay will disconnect the phone from the tip and ring lines in the event of station irregularities.

Abstract: A radio telephone system comprises a base unit electrically connected to a wire telephone line and at least one radio telephone set which can be connected to the base unit through a radio communication line. A predetermined threshold value is normally set for the intensity of a received electric field generated in the radio line so that, when the received electric field intensity does not reach the threshold value, for example when the radio telephone set is separated by more than a predetermined distance from the base unit, the radio communication line is automatically cut off. In the radio telephone system, the threshold value for the received electric field intensity can be arbitrarily modified by means of a suitable operating member disposed in the radio telephone set to thereby increase the flexibility of the radio telephone system.

Abstract: A cordless telephone system includes a fixed unit and a portable unit which communicate with each other over a radio link. The portable unit includes a rechargeable battery, and a battery saving device for interrupting a power supply to predetermined sections of the portable unit in response to a control signal. The fixed unit includes a charging device for converting and AC voltage into a DC voltage to produce a charging voltage, and a detecting device for detecting when the rechargeable battery is being charged by the charging voltage, and for outputting a detection signal in response thereto. The fixed unit further includes a supplying device which is responsive to the detection signal for outputting the control signal and for supplying the control signal to the portable unit together with the charging voltage.

Abstract: A cordless telephone system which allows, in addition to outside-line communication, extension communication between wire and wireless telephone sets and also which can prevent wiretapping of communication contents during the outside-line communication. The system comprises a first switch connecting a connection unit to a wire telephone circuit, a connector connecting the wire telephone set to a connection-unit terminal of the first switch, a second switch switchingly controlled by the connection unit to supply a predetermined DC current to the connection-unit terminal of the first switch, and a DC power source for outputting the predetermined DC current. Further provided in the system, in addition to the above arrangement, are a third switch connected as inserted between the connection-unit terminal of the first switch and a voice circuit of the connection unit and a fourth switch connected as inserted between the connection-unit terminal of the first switch and the connector.

Abstract: A car telephone equipment having an automatic calling function which can automatically call a destination party after passage of a specified time period or at a predetermined time. A telephone number of the party is stored in a dial number memory, a desired time period is set at a timer or a desired time is stored in a time register, so that a radio communication circuit is established between the telephone equipment and a base station to perform an automatic calling operation over the destination party telephone number stored in the dial number memory at the moment when the timer times out or when a time of a clock coincides with the time stored in the time register.

Abstract: A converter device for enabling a standard, corded telephone to function as a cordless telephone, said converter comprising radio-linking means interposable between said standard telephone and a telephone transmission line.

Abstract: A radio telephone apparatus power-supplied with a battery comprises a power supply control means for controlling the battery so as to terminate power supply if the apparatus is not operated for a predetermined time period. The apparatus further comprises means for informing at least a user of the termination of power supply prior to the power being turned off.

Abstract: A cellular telephone system is described of the type wherein a plurality of contiguous cells, each having a different assigned set of transmission frequency channels, are arranged with handoff circuitry for maintaining continuous communication with mobile telephones moving from cell to cell. The system includes at least one cell having a plurality of transmitting and receiving antenna sets. Each set is positioned at a respective antenna sub-site at the perpihery of the cell or other suitable location, and is configured so that propagation and reception of signals is limited to substantially within the boundaries of the cell. Control circuitry monitor the strength of the signal received by each of the antenna sets at each frequency channel in the assigned set. Transmission, at each frequency channel in the assigned set, is confined to the antenna set at one sub-site in the cell having the strongest received signal at each frequency.

Abstract: A headband radiophone combination set uses a control circuit and a receiver-transmitter circuit to reciprocally transmit or receive signal through an antenna to communicate with the antenna and the receiver-transmitter circuit of a main switching unit for internal, external and regular alternative telecommunication.

Abstract: Call data signals actuated by a telephone terminal are provided from a telephone communication system to indicate call data as the called number, the calling number and the calling equipment. The call data signals address related control functions for interfacing a multiple-format multiple-port data processing system. Screening tests and format selection for the processing system are performed. Individual telephone terminals and individual data formats are interfaced under controlled conditions specified by the call data. Time tests, history tests and demographic tests are executed in addition to basic qualification tests. Control is executed from active data storage for assembled control words and record words. Record words for individual calls are stored along with developed billing data.

Abstract: A mobile paging call back system is provided includes a control unit interconnecting a radio pager, a memory, an indicator, a control switch, and an automatic dialer, with the control unit including a logic circuit programmed: (i) to provide verification that valid data representing a telephone number has been received from a radio pager, (ii) to store that data in the memory after verification, (iii) to activate the indicator, after the verification, to provide a system user observable signal indicating that valid data has been received, and (iv) to either transfer the stored data from the memory to the automatic dialer means for use therein to dial a mobile radio telephone or to erase that data from the memory in response to system operator activation of the control switch. Preferably, the system of the subject invention is mounted on the dashboard of a mobile vehicle. A related method is also disclosed.