Abstract: A method for detecting fraud in a cellular radio telephone system. Fraud is suspected when the system detects a multiple access from a mobile station, when an activity collision occurs, when the system receives a premature registration from the mobile station, when auditing or operator-initiated locating of the mobile station reveals the existence of the mobile station in two locations simultaneously, or when tracing of mobile subscriber activity reveals unusual activity.

Abstract: To perform control of a mobile telephone system which uses a dedicated control channel type multichannel access system, when an emergency telephone call is made from a mobile telephone to the police or fire department, the mobile telephone references a memory into which is stored the identification code of a service area within which calling is permitted, the base station having the highest received field strength of the control channel radio signals of base stations in this service area is selected and the emergency call is made to the thus selected base station. When doing this, the mobile telephone stores the identification code of the base station to which the emergency call was made, and when a next call is made after the emergency call is completed, the call signal is sent on the control channel of the base station to which the emergency call was made, based on the thus stored identification code of the base station.

Abstract: A mobile radiotelephone is responsive to user entry of an extension such as the last four digits of a telephone number, to identify a prefix such as the first three digits of a telephone number, for the user-entered extension. By automatically identifying a prefix, the user need not enter all of the numbers for the destination telephone. A default automatic prefix may be stored and retrieved in response to user entry of an extension. Alternatively, in response to user entry of an extension, the stored extensions in a memory such as a speed dialing memory are searched to identify a match to the user-entered extension. The associated prefix for the matched extension is retrieved. Default and speed dialing prefix identification may be combined. Simplified dialing and enhanced user safety are thereby provided.

Abstract: Each of a terminal adapter and a switching equipment ancillary device has a protocol controller for analyzing and controlling a communication protocol control signal transmitted from a data terminal, so that a modem interface can directly be set to an originate mode or an answer mode. As a mobile station has no modem function, the switching equipment ancillary device and a modem terminal are synchronized with each other by a clock signal, and transmit and receive data therebetween. A transmission delay caused by a retransmission effected under error correction control on a communication line is adjusted by flow control between the modem interface and the modem terminal.

Abstract: According to the present invention, when an audio signal is reproduced through headphones, the same localization, sound field and so on as those obtained when the sound is reproduced by loudspeakers located in a predetermined relationship upon reproduction of the sound by the loudspeakers can be obtained. Particularly, gyration of a head of a listener is detected by using a vibratory gyroscope suitable for detection of the gyration of the head. Even when a vibratory gyroscope (175A), (175B) or (175C) is attached to an attachment position which is a head band (177) of a headphones (170) or a left arm (17L) or a right arm (17R) thereof, it is possible to detect the gyration of the head of the listener.

Abstract: An apparatus and method is provided for transparent communication between a wireless remote or mobile device and a fixed wired communication host network. The apparatus and method may include a remote network controller that logically resides between the host network and the existing radio infrastructure(s) that are used to provide wireless contact with one or more remote devices. The remote network controller is connected to the host communication network as a protocol-appropriate communications controller so that remote devices are indistinguishable to the host network from the locally-attached devices. Each remote device may be provided with an asynchronous serial data interface to communicate with a mobile data controller. The mobile data controller, in combination with the remote network controller, provides end-to-end data communication such that incompatible protocols are transparent to the remote device and host communication network.

Abstract: An apparatus for interfacing at least one land-line telephone service, at least one wireless cellular-type telephone service, at least one cellular-type wireless telephone and at least one standard telephonic type communication device through standard building interior telephone cable.

Abstract: A radiotelephone (RT) operates in either a cellular telephone mode or a cordless telephone mode within a cellular telecommunications system. The RT operates in the cordless mode if it is within the operating range of a cordless base station. The cordless base station receives data from a central telephone office, converts the data into a transmittable caller ID message, and transmits the caller ID message to the RT. The RT receives the caller ID message and displays it in a readable form to the user. The caller ID message may be saved at the RT for subsequent retrieval by the user. In addition, a speed dial operation may be performed to respond to the caller ID message.

Abstract: An apparatus for the transmission of speech signals reduces the effect of disturbances on the transmission quality. Two microphones are provided for picking up speech signals. Signal processing ensues in three partial frequency bands. The microphone signals are high-pass filtered in a lower frequency band, in the middle frequency band the signal is weighted with a scalar factor, so that this frequency band is damped during the speech pauses, and in the upper frequency band, an adaptive filter is used. At the beginning of the processing, a treble enhancement of the signals ensues, which is canceled by an inverse filter before the output of the improved signal.

Abstract: A method and system for providing extension phone service within a mobile radio communication system. The mobile radio communication system includes a home location register (HLR), a plurality of mobile switching centers (MSCs), and a plurality of mobile stations. A single subscriber number is assigned to each one of the plurality of mobile stations. When a call is directed to the single subscriber number, the HLR transmits an individual routing request message to each one of the plurality of MSCs where mobile stations assigned to the single subscriber number are believed to be located. Each of the MSCs pages the mobile stations within its service area. Upon receiving a response from one or more of the paged mobile stations, each of the MSCs establishes voice channels with the responding mobile stations, and alerts the stations' subscribers. The MSCs then report to the HLR which of the alerted subscribers answered the alert.

Abstract: A communication system using voice compression includes a transmitter base station (113) and a selective call receiver (112). The transmitter base station (113) includes an input device (204) to receive an audio voice message which is stored in a memory (209). A processing device (208) digitizes the audio voice message to provide an input signal which is divided into a sequence of equivalent time frames, and differences in a short-term frequency spectrum between adjacent time frames is determined to derive distance measurements. A speed factor is computed as an average of the distance measurements, and the input signal is time-scales in accordance with the speed factor and then transmitted by a transmitter (102).

Abstract: A mobile audio program selection system includes a radio frequency based information distribution system having mobile users. The distribution system includes a mobile switching office selectively connecting the mobile users of the information distribution system, and information service providers, operatively connected to the mobile switching office, at least one of the information service providers receiving user selection signal inputs received by the mobile switching office from a mobile user, and transmitting user selected information to the mobile switching office responsive to the user selection signal inputs. In addition, the distribution system includes at least one mobile terminal. The mobile terminal includes a receiver, operatively coupling the mobile terminal to the mobile switching office, and receiving the user selected information from the at least one of the information service providers via the mobile switching office.

Abstract: The invention provides a apparatus and method for processing incoming telephone calls directed to a user. Incoming telephone calls have certain status information which is generated by the call processor. A transmitter is utilized for transmitting pages to a paging devices carried by users. The paging devices have a display device associated with them and the transmitted page includes the status information associated with an incoming call for display on the display of th paging device.

Abstract: Configuring a telepoint base station 101 having base station channels 105, 110 and 115 that are coupled to a public switched telephone network 103 via subscriber channels 120, 125 and 130 by, determing the subscriber channel IDs affiliated with the subscriber channels 120, 125 and 130, and storing the subscriber channels IDs in memory 102. Subsequently, using the subscriber channel IDs to determine which of the subscriber channel IDs 120, 125 and 130 is a group ID for the telepoint base station, and storing the group ID.

Abstract: Apparatus for automatically distributing communications between users and a fleet of mobile stations through a central station including a telephone exchange (1), a plurality of telephone answering modules (3) provided with a phone numbers data-bank and connected between said exchange (1) and a LAN net (4), and a pair of central processing modules (5, 5') connected to said LAN net (4) and to a plurality of radio transmission interface modules (6), each of these controlling a receiving radio (7) and a transmitting radio (8). Each mobile station includes a radio transceiver provided with a keyboard and a display, a localizing device, and a local processing module controlling the operation of the mobile station and containing a clock provided with a clock time controller.

Abstract: Of special application in cellular mobile networks that communicate this terminal, via radio, with a base station to provide services of voice and/or data communications to a number of subscribers and which, in addition to the basic communications service, also support an emergency call service performed through the terminal in question by dialling a certain number. This terminal comprises means (41) for generating user signalling tones and which also generate an emergency call dial tone, different from the other tones already present, when a call process is initiated by the subscriber (5) in the case where the fixed cellular terminal is only capable of making emergency calls.

Abstract: A dual mode terminal is provided, in which a mobile station of a mobile radio system and a cordless telephone are combined. This kind of terminal may have a connection with both a base station of the mobile radio system and a fixed part of the cordless telephone system. Handover may imply the transfer of a call from a fixed part of the cordless telephone system having a terminal-initiated handover to a base station of the mobile radio system having a network-initiated handover. In order to carry out a proper handover procedure, the cordless telephone part obtains from the mobile station part of the terminal measurement results relating to received signal strengths of the mobile system base stations in the neighborhood. The cordless telephone part of the terminal forwards these measurement results via a fixed part of the cordless telephone system to the mobile exchange of the mobile system in a handover request message.

Abstract: A clasp structure of a cellular phone and its battery set includes a cellular phone and a battery set. The battery set includes a case and a battery base. On the battery case there is a clasp component which uses the elasticity of a spring component to join and to separate the cellular phone and the battery set. When the battery has exhausted its power, the user pushes the clasp component to make the battery set separate from the cellular phone.

Abstract: A method for establishing a connection between a first communication device, connected to a communication network and having at least one identity, and one or several second communication devices, connected to the communication network and located in a limited location (i.e., paging) area, each of them having at least one identity. In order that the user of the system may define the location area dynamically, the first communication device sends to the communication network a message containing an identification of the location area and the identity of one or several second communication devices and the communication network calls at least one subscriber device provided with the identity only in the location area defined by the location area identification.

Abstract: A method of checking a subscriber equipment identity in a subscriber equipment identity register and a mobile telephone exchange, in connection with which there is a subscriber Equipment Identity register, which comprises lists containing subscriber equipment identities, which lists have list identities. In order that desired short messages may be transmitted to subscribers, responsive to an occurrence of a subscriber equipment on one of the lists, the mobile telephone exchange includes a memory for storing an operation instruction corresponding to at least one list identity, a short message generator for generating a short message according to the stored operation instruction and for transmitting the generated short message to the subscriber.