Abstract: A method for making emergency calls in cordless telecommunications systems, in particular DECT/GAP systems, wherein in order to be able to make emergency calls is proposed, which allows for the fact that the contains mobile parts which do or do not have access authorization to base stations, such that to an emergency call connection occurs in all cases.

Abstract: The present invention provides a private branch exchange which allows the same system call sign (SYS-ID) to be shared with other private branch exchanges for allocating it to general cell stations. The private branch exchange (PBX), to which a control cell station (CS) is allocated, communicating with mobile stations (PS) reads the system call sign from the control cell station where the system call sign is stored in advance. The system call sign is stored into cell stations in a plurality of private branch exchanges connected to each other when the cell stations belong to the same group as that of the control cell station of the first mentioned private branch exchange.

Abstract: A mobile phone extension set mainly includes a telephone set on which a signal bus and a charger are provided. The signal bus receives and transmits various function signals and is able to electrically connect a mobile phone via a signal line extended between the signal bus and the mobile phone. The charger is adapted to electrically connect and supply power to charge the mobile phone. Incoming and outgoing calls to and from the mobile phone could be received and made, respectively, on the extension telephone set instead of the mobile phone. More than one extension telephone set may be electrically connected to one another to give the mobile phone expanded extension ability for advantageously using at isolated areas where wire telephones could not be easily mounted.

Abstract: In one aspect of the present invention, a method and apparatus are provided for tracking a plurality of frequency-shift-key modulated signals in a communications device. The method includes determining a first threshold value for a first input signal of the plurality of signals, comparing the first input signal to the first threshold value and providing a first output signal. The method includes determining a second threshold value for a second input signal of the plurality of signals, and retaining at least a portion of the first threshold value while determining the second threshold value.

Abstract: A DECT fixed part for providing a communications link between a DECT portable part and a GSM mobile switch center, the fixed part comprising a compression negotiation means for: receiving from one of the portable part and the mobile switch center a first message specifying a form of compression for a data service; and using that first message, determining a second message to be sent to the other of the portable part and the mobile switch center to request it to adopt a corresponding form of compression for the data service; so as to allow the provision of a compressed data service between the portable part and the mobile switch center.

Abstract: An information distribution system is formed by a portable terminal, a local server for providing a local information which is accessible through a local radio network, and a subscription server for carrying out a membership subscription procedure which is accessible through a public network. When a terminal ID received from the portable terminal along with an access request is not registered in a membership database, the local server sends a server access membership subscription guidance for urging the portable terminal to carry out a membership subscription procedure. The portable terminal then sends a server access membership subscription request to the subscription server so as to carry out the membership subscription procedure.

Abstract: The present invention is related to a device for the radio transmission of telephone calls via several base stations which are spatially separated from mobile phones being in a DECT standard. The spatially separated base stations can be connected to the telephone network via several switching centers which are also spatially separated, whereby an additional line is then connected between the switching centers for measuring the running time between the switching centers and for synchronization.

Abstract: A mobile telephone is connected to a private base in the same way as it is connected to a mobile telephone network. The base is connected to another telephone network. The user employs the same interface, i.e. the telephone, to set parameters of services of either network. When the telephone is connected to it, the base provides an interface between the second network and requests sent via the telephone. A server of the second network can therefore process requests from the mobile telephone and the base can therefore manage acknowledgements from the server on-line or off-line and without interfering with a call.

Abstract: A cellular private branch exchange for facilitating cellular communication for a first plurality of mobile station units, which includes a first base station subsystem for communicating with a first and a second mobile station unit of the first plurality of mobile station units on respectively a first and a second cellular bearer data channel. The cellular private branch exchange further includes a cellular private branch exchange unit coupled to the first base station subsystem. In turn, the cellular private branch exchange unit includes a private mobile-services switching center for providing mobility management for the first plurality of mobile station units, the private mobile-services switching center representing a first cross-connect node capable of cross-connecting the first bearer data channel with the second bearer data channel for calls between the first and the second mobile station units.

Abstract: A mobile terminal is provided with an access code for a destination receiving device. The access code specifies that the user terminal provide a communication signal through at least one communication network to the destination receiving device. The at least one communication network is assumed to have a capability of forwarding received communication signals that include access codes having a predetermined format to destination receiving devices. A determination as to whether a format of the access code provided to the user terminal differs from the predetermined format is performed. If these formats differ, another step includes modifying the format of the access code provided to the user terminal to produce a modified access code having the predetermined format in the communication signal.

Abstract: A DECT communication system having; at least one portable part; and a fixed part for connection to a GSM interworking unit of a GSM communication system and capable of wireless communication with the portable part to provide data service communications between the portable part and the GSM interworking unit; and including converting means for converting between data service signals at the portable part and signals in ISDN format, so as to provide data service communications between the DECT communications system and the GSM interworking unit at a data rate greater than 9600 bps.

Abstract: A public/private common mobile communication system provides a call originating service method. Upon receipt of an origination call message from a mobile station (MS) through a BTS (Base station Transceiver Subsystem) which provides both public and private mobile communication services, it is determined whether the call origination message is for the public mobile communication service or the private mobile communication service. The call origination message is transmitted to either a public mobile communication network or a private mobile communication network based on the determination results.

Abstract: A cordless telephone arrangement, such as a DECT Business Cordless Telecommunications (BCT) system, comprises a PBX base station (1) and a plurality of mobile stations in the form of portable handsets (2a,2b . . . 2n). The handsets themselves include no means for independently dialling a telephone number. Instead of a conventional keypad the handsets each comprise only a single “TALK” key 7. The PBX 1 is adapted to dial on behalf of each handset in response to an instruction received by radio communication therefrom. In one embodiment the instructions are delivered orally to the handset. In this case the PBX includes a voice recognition device 12. A voice synthesizer 11 may also be included for returning spoken messages to the handset. The TALK key 7 is used to indicate that the handset is required to make a call, to terminate a call, or to accept an incoming call.

Abstract: When a mobile station first initiates a connection, the mobile station is synchronized on the basis of an evaluation of an organization channel in the mobile radio network. The mobile station transmits, in a frequency band of a home base station and to the home base station a message that contains a mobile-station-specific first identifier. The message is received and evaluated by the home base station. If the first identifier matches a second identifier registered for the home base station, a connection is set up between the mobile station and the home base station.

Abstract: The pattern of intermittence of an incoming call signal from a communication line is reflected in the way a wireless communications apparatus such as a cordless telephone is rung. To achieve this, a master set discriminates the intermittence of an incoming call signal from a communication line in a single communication and sends a master set information in which the intermittence of the incoming call signal from the communication line is reflected. On the basis of the information reflecting the intermittence of the incoming call signal from the communication line, the slave set notifies the user of the incoming call in a way that reflects the pattern of intermittence of the incoming call from the communication line.

Abstract: A cordless phone 1 is able to communicate signals 3 via antenna 2 and 3 with transponder unit 5. When the transponder 5 is physically connected (as shown) via multi-way connector 12 to base station 19, the system communicates via PSTN interface 9 and cable 10 connected to local-loop socket 11 within a fixed telephone network. When the transponder 5 is disconnected (not shown) from base station 19, the system communicates via external antenna 6 by radio link with a local base station within a cellular phone network. The base station 19 provides means to recharge the batteries (not shown) of cordless phone 1 via connectors 13 and transponder unit 5 via connectors 14, with dc supply being provided by power plug 16 via cable 17. The transponder unit may include a display screen and PDA electronics (not shown), or, be incorporated within a portable computer (not shown).

Abstract: The present invention provides methods of transmitting information within a personal handy-phone system wireless local loop and personal handy-phone system wireless local loops. One embodiment of a personal handy-phone system wireless local loop according to the present invention comprises: a base station; a repeater station configured to transmit a plurality of uplink radio signals to the base station and receive a plurality of downlink radio signals from the base station; and a portable station configured to transmit the downlink radio signals to the repeater station and receive the uplink radio signals from the repeater station.

Abstract: An apparatus and method for providing a massively parallel wireless network for data and telephony comprised of a plurality of base station devices which are owned and operated by consumers and businesses across an area. The base station devices connect to a landline network and communicate wirelessly with a plurality of wireless handsets. Each handset can communicate with any of the base stations in the network. To place a call (or access data), a handset communicates with a nearby base station on a polling channel. The handset determines the strongest station signal and thereafter uses a designated channel to place calls through the landline connection via the base station.

Abstract: A telephony device includes a wireless handset having a memory and a processor; and a base station having a connection to a telephone line and a transceiver for communicating with the wireless handset. The processor encrypts data to form encrypted data prior to storage in the handset memory, and stores the encrypted data in the handset memory. Further, the processor reads the encrypted data from the handset memory and decrypts the encrypted data for further use.

Abstract: When an incoming call to a wireless communication apparatus is detected, a wireless control apparatus uses a wireless link, which has been established by previous communication, to perform succeeding communication. Examples of communication include communication of audio or data already completed, or, when there are a plurality of wireless communication apparatus, communication of control information by a wireless link established when notification of an incoming call is given to the wireless communication apparatus.

Abstract: A digital portable telephone is configured without the complex circuitry normally required for its base unit and handset unit to switch between transmit and receive states while frequency hopping in a frequency hopping system. The architecture for this digital portable telephone provides improved performance over that of other digital portable telephones by combining the frequency hopping spread spectrum technique with other spread spectrum techniques in communications between the handset unit and the base unit. Specifically, delta modulation and a redundant transmission of the signal are the other forms of signal spreading that are employed. Such signal spreading advantageously achieves additional processing gain. Another attractive attribute of this architecture is a high level of immunity to interference from other portable telephones also operating in the same frequency hopping band.

Abstract: A wireless local loop access network system includes (a) at least one base station (13) making radio communication with a plurality of subscriber's terminals, and (b) a base station controller (14) controlling the base station (13) and connected to a public switched telephone network. The base station controller (14) includes a memory (16) for storing subscriber data therein. For instance, the memory (16) stores a first identifier used for identifying a subscriber in an interface protocol between the wireless local loop access network system and the public switched telephone network, a second identifier used for identifying a subscriber in an radio-signal interface protocol in the wireless local loop access network system, and data about correspondence between the first and second identifiers.

Abstract: A plurality of transmitting and receiving stations are provided at randomly distributed locations within a telecommunication network, and switching circuitry is provided within the stations themselves for routing of calls between stations in the network utilizing other stations in the network for relaying of such calls where necessary. To this end each station incorporates a call routing control unit acting to select a further station to which a call from a source to a destination is to be transmitted for the purpose of relaying the call. The call routing control unit transmits an interrogation signal to be received by other stations in the network within range of the transmitting station, and the call routing control unit of each of the other stations transmits an acknowledgment signal when the station is available for relaying a call in response to the interrogation signal received from the station.

Abstract: An extension telephone having a numeric keypad for entering inputs including programming data is connected to a cellular line access unit via an I/O connector. The cellular line access unit, which includes a processor and a memory, stores programming data received from the extension telephone within the memory and accesses the programming data in the memory to establish communication between the extension telephone and a cellular communication network. In a preferred embodiment, programming data that is input utilizing the keypad of the extension telephone is transmitted to the cellular line access unit as a series of dual tone multi-frequency (DTMF) signals, and the cellular line access unit provides feedback in response to the programming data, for example, by generating a tone or displaying a message within a display of the extension telephone.

Abstract: A radiotelephone terminal unit is provided for a subscriber who has a portable radiotelephone terminal of the mobile network type or cordless telephone type which can be carried around by a user and by means of which the user communicates via a communication network to which the user is connected by radio via a relay transceiver station. The unit includes a radiotelephone terminal which is complementary to the portable radiotelephone terminal, preferably remains in place, and can be used conjointly with the portable radiotelephone terminal when connected to the relay transceiver station by a call set up via the station. Complementary functions of the two terminals can be employed by the same user having simultaneous access to both terminals.

Abstract: A home WAP gateway system is disclosed that provides user selectable access from digital cordless telephone handsets adapted to WAP communications to services of a local home WAP gateway or to services of a remote WAP gateway in a public network. By a switching means responsive to a message from a handset comprising switching information, the system provides a communication path between a communicating handset and a home WAP gateway when the switching information specifies a predefined home WAP gateway path or between a communicating handset and a public or private telephone network when the switching information specifies a different path.

Abstract: A system for establishing a telephone connection to a portable telephone in a telephone system, comprises a telephone line connected to a base station, a plurality portable telephones each connectable to telephone line via the base station. The base station monitors the telephone line and outputs a trigger signal when it detects ringing at the telephone line. The trigger signal comprises an address or an ID for the address which addresses at least a group of the plurality of telephones whereby the telephones receiving the trigger signal starts ringing. The base station later on outputs an information signal which comprises the same address or ID for the address as the trigger signal and information about the caller, whereby the addressed telephones are provided with the information about the caller. Each of the telephones which are ringing comprises establishing a communication link from the phone to the base station when the telephone is activated as a response to the ringing.

Abstract: An integrated cellular and cordless communication system in which cellular calls are forwarded to a landline telephone number associated with a personal base station when a subscriber terminal is determined to be within a predefined vicinity of the personal base station is described herein. Once forwarded to the personal base station via external network elements, such calls may be answered using a cordless device operative to communicate with the personal base station. Alternately, the calls may be transferred to a voice messaging module within the personal base station. When the subscriber terminal is determined to have been removed from within the vicinity of the personal base station, a message from the personal base station to the external network elements results in modification of a call forwarding address such that subsequent calls intended for the subscriber terminal are in fact routed thereto.

Abstract: A cordless telephone base station 1 for connection to a telecommunications network 7 has means (11) for handling incoming calls according to the presence or absence of the handsets (3a, 3b) as detected by responses to paging signals transmitted by the base station.

Abstract: A cellular radiotelephone (user terminal) (10) includes a keypad (22) having a plurality of keys (22a, 22b) and a display device (20) for displaying information, including messages, to a user. A method includes the steps of providing the user terminal with an access code for a destination receiving device, and specifying that the user terminal provide a communication signal through at least one communication network to the destination receiving device. The at least one communication network is assumed to have a capability of forwarding received communication signals that include access codes having a predetermined format to destination receiving devices. In response to specifying step, another step is performed that includes determining whether a format of the access code provided to the user terminal differs from the predetermined format.

Abstract: A system, method and apparatus for activating and deactivating features in a mobile telecommunications system based upon the position of a mobile station. An accurate position of the mobile station is periodically determined and compared with stored coordinates for a specific location. Depending upon the outcome of this comparison, selected features are automatically activated or deactivated.

Abstract: A dual fixed/mobile communications system comprises a set of base stations (BS) connected to a local exchange (LE), and a set of wireless terminal stations (WTS) that communicate, by radio, with the base stations (BS) in order to provide telephone services to telephone sets (T) connected, by means of subscriber lines (LS), to the wireless terminal stations (WTS). These wireless terminal stations (WTS) are inhibited when use is made of cordless telephones (WT) which, in an alternative form, communicate directly with the base stations (BS) when they are located within their area of coverage. The wireless terminal stations (WTS) can also include a radio transceiver RT through which a cordless telephone (WT)1 which is outside the coverage of the base stations (BS), can communicate with them.

Abstract: A method and apparatus for controlling communications between a base and a handset capable of communicating with each other on at least one communication channel within a channel set. The method involves transmitting a new channel message including a preferred channel identifier from the base to the handset, on different channels of the channel set until an acknowledgement signal is received from the handset. In response to the acknowledgement signal, the preferred channel identifier is stored in a base working channel transmit buffer. Further communications between the base and the handset are conducted on a communications channel identified by the preferred channel identifier.

Abstract: A cellular private branch exchange for facilitating cellular communication for a first plurality of mobile station units, which includes a first base station subsystem for communicating with a first and a second mobile station unit of the first plurality of mobile station units on respectively a first and a second cellular bearer data channel. The cellular private branch exchange further includes a cellular private branch exchange unit coupled to the first base station subsystem. In turn, the cellular private branch exchange unit includes a private mobile-services switching center for providing mobility management for the first plurality of mobile station units, the private mobile-services switching center representing a first cross-connect node capable of cross-connecting the first bearer data channel with the second bearer data channel for calls between the first and the second mobile station units.

Abstract: A mobile radio communications system including a public system and at least one private system, and “multimode” mobile stations suitable for operating in either of said systems, in which the management of the radio resources of said at least one private system is integrated in that of said public system, the mobile radio communications system including means for conveying over a dedicated signaling channel allocated to a mobile station in cellular mode, information about radio resources allocated to said mobile station in private mode.

Abstract: A communication method in a cordless telephone system having a base unit with which a plurality of portable units can be registered, and a portable unit registrable with a plurality of base units. In the method, if the base unit goes off-hook for requesting a call, a busy signal is sent to all the portable units registered with the base unit. If the call is terminated in the base unit, a call termination signal is sent to all the portable units. Upon reception of the busy signal, a portable unit stores data indicating that the base unit is busy in a selection table of a memory. For initiating a call, the portable unit sends a call request signal to a primary base unit listed in the selection table if the primary base unit is not busy, and otherwise, to another idle base unit. When a call termination signal is received from the busy base unit, the busy state indicating data is deleted in the selection table.

Abstract: An intercommunication method between portable units in a TDMA (Time Division Multiple Access) cordless telephone system. In an embodiment of the present invention, it is determined whether a portable unit is positioned in the propagation area of a base unit upon an intercom request from the portable unit. A time reversal is then performed when the portable unit is out of the propagation area of the base unit. Time slots are designated for intercommunication between the portable unit and a portable unit to be called and an intercom call signal is transmitted in the designated time slots. When a called party responds to the intercom call signal, a speech mode is performed. Upon termination of the intercom call, the reversed time is reversed again to recover the original state. In another embodiment, it is determined whether a portable unit is positioned in the propagation area of a base unit upon an intercom request from the portable unit.

Abstract: A cellular radio system is to be implemented in an existing facility which performs switching functions and provides service features, without requiring major changes therein. Communication between the individual base stations (BS1, BS2, BS3, BS4) takes place by means of radio via existing radio channels. A cordless terminal (HS1) is assigned to a base station. If the terminal is located in the area of another base station during an incoming call, the terminal is searched for via a radio channel between the base stations. If it is found in the area of the other base station, the call is handed over to this other base station. The same applies to outgoing calls and to other functions.

Abstract: The invention relates to a procedure for ensuring emergency calls in a wireless local loop environment which is based on technology employed in a mobile telephone system and which comprises a telephone exchange (1), an access node (2) connected to the telephone exchange, a terminal device (3) and a base station (4) connected to the telephone exchange via the access node and serving to transmit call signals between the access node and the terminal device, in which the home network (5) of the terminal device is defined by the base station and the associated access node and in which base stations (7) of other networks are disposed in the environment of the local loop, so that the terminal device receives information signals from the surrounding base stations and, based on said information signals, determines the base station it is communicating with, and the emergency call is set up via any base station compatible with the terminal device.

Abstract: To allocate telecommunication channels of different channel capacity, e.g. the ISDN D channel and DECT channels to one another (e.g. simulation of the ISDN channel structure by the DECT channel structure) with good (economic) utilization of the bandwidth and minimum technical complexity in a hybrid telecommunication system, particularly an “ISDN DECT-specific RLL/WLL” system, a DECT-specific Cs channel and a DECT-specific Cf channel are used in dependence on the amount of information transmitted on the ISDN D channel for transmitting information in the hybrid telecommunication system.

Abstract: A method for enabling the integration of the Personal Access Communications System (PACS) which supports low-tier radio, wireless communication devices with a GSM network used to support high-tier, cellular devices to allow connection of the PACS system to public switched telephone networks that do not have Advanced Intelligent Network capabilities. The functions of the conventional PACS Access Manager are redistributed among the various components of the PACS/GSM integrated system. Modifications to the PACS protocol to make it compatible with GSM protocol are detailed.

Abstract: A device of the DECT type is disclosed which includes a base station connected to the telephone network transmitting an identification information signal which defines a calling user. This station is formed by a processor assembly, a memory containing an execution program and a random-access memory. The device also includes at least one handset formed by, inter alia, a display, a processor assembly notably intended to control said display. For transmitting the identification information, broadcasting means are provided for broadcasting to all the handsets by using message transmission means for transmitting messages of the service provided by said DECT standard.

Abstract: A method of transmitting a voice communications signal includes the steps of sampling the signal and creating digital representations of the samples. The digital representations are speech-coded to create speech-coded data which is converted to analog symbols. A carrier in the 46-49 MHz band is modulated by the analog symbols and transmitted. A method of receiving a voice communications signal includes the steps of receiving a modulated carrier in the 46-49 MHz band and demodulating the modulated carrier to recover analog symbols. The analog symbols are converted to digital samples, which are then converted to speech-coded data. The speech-coded data are decoded to produce digitized samples, which are converted to analog samples and filtered to produce the voice communications signal. A cordless telephone system according to the invention includes a handset and a base unit.

Abstract: In a mobile communication system including an outdoor public base station, an indoor private host phone unit, and a mobile station formed by a cordless handy phone unit, when the mobile station is located within an area where a service area of the outdoor public base station overlaps a service area of the indoor private host phone unit, the mobile station waits for connection with the outdoor public base station by way of the host phone unit. Thus, the mobile station always waits for connection only with the indoor private host phone unit.

Abstract: A communication system for communicating between a first device and a second device is disclosed. The first device includes a first processor and a first memory, while the second device includes a second processor a second memory. The processors allow communication between the devices when an identical identification code is stored in both devices. In response to a user command, the first processor replaces an old identification code with a new identification code in a first memory location of the first memory. In response to a request signal from the first device, the second processor replaces the old identification code in a first location of the second memory with the new identification code. In response to an acknowledge signal from the second device, and after verifying that the new identification code is included in the acknowledge signal, the first processor replaces the old identification code in a second memory location of the first memory.

Abstract: The present invention provides a bi-directional (and/or uni-directional) multiplexing messaging gateway for wireless devices, such as for devices using the Global System for Mobile Communication (GSM) wireless digital standard, or any other suitable protocols. Electronic messages may be transmitted over a wireless connection to, or to and from, a mobile phone, and the present invention maintains and facilitates all necessary housekeeping functions. For example, electronic messages addressed to a mobile phone may be received by the gateway of the present invention from the Internet, a LAN, or any other source, and routed to the appropriate mobile phone. Such electronic messages may be originated manually or may be automatically generated by specific computer applications, such as a scheduling program operating on a LAN.

Abstract: A DECT fixed part for providing a communications link between a DECT portable part and a GSM mobile switch center, the fixed part comprising a compression negotiation means for: receiving from one of the portable part and the mobile switch center a first message specifying a form of compression for a data service; and using that first message, determining a second message to be sent to the other of the portable part and the mobile switch center to request it to adopt a corresponding form of compression for the data service; so as to allow the provision of a compressed data service between the portable part and the mobile switch center.

Abstract: A cordless modem comprises a radio pair interfaced to a standard data/fax modem which allows a user of a personal computer to wirelessly connect to a telephone line. One end of the radio pair is a remote unit interfaced to the modem contained within the PC while the other end is a base unit connected to a standard telephone wall jack. The base unit can selectively discriminate and adjust for signals received from a telephone voice handset or data signals received from the cordless modem remote unit. Upon receiving an off-hook signal or an incoming call signal, the base unit identifies the type of data (i.e., voice or computer modem data) and adapts accordingly by placing an FM modulator in either of a narrow band deviation or a wide band deviation covering the required range of the particular signal combined with local echo. That is, when voice data is present, a low deviation, narrow filter combination is selected.

Abstract: A cordless telephone arranged for operation in a frequency hopping system includes an arrangement which allows multiple cordless telephone portable units to operate in close reception proximity to each other and without interference while either responding to a service request from a cordless telephone base unit or in generating a service request to the base unit, also in the system. Contention between portable units in the system in responding to a service request from the telephone base is resolved through use of a polling process wherein the base unit polls each one of the portable units as part of this polling process. Each portable unit is assigned a number of acquisition channels distributed across the frequency hopping channels used for normal communications between the base unit and the portable units. These channels are different from and do not conflict with other acquisition channels respectively assigned to other portable units, also in the system.

Abstract: The invention relates to a method for cordlessly connecting a data terminal to a data transmission network using the DECT telecommunications system. In the method of the invention, the portable radio part (PP) and fixed radio part (FP) insert signalling information according to the V.24, for example, in frames complying with the DECT protocol to be radio transmitted via the air interface. When using signalling internal to the data channel it is advantageous to use an auxiliary protocol complying e.g. with the V.110 standard. Local signalling can also be used, in which case the data channel need not be used for signalling during data transmission. The method can also be used to transfer the automatic call setup commands according to the V.25bis standard. The method of the invention facilitates a short-range cordless data connection which is compatible with other DECT applications and which can use advantageous DECT system components.