Matches 401 - 450 out of 539 < 1 2 3 4 5 6 7 8 9 10 11 >
Match Document Document Title
5890057 Modulation signal calibration between modem and radio using loopback  
A radio-frequency output signal having a specified characteristic is produced using a combination of a calibrated radio unit in which a calibration factor is stored and an uncalibrated modem unit....
5889816 Wireless adapter architecture for mobile computing  
A adapter for wireless networking provides for reconfigerable media access control and data packet formats. The flexible adapter comprises a modem interface for controlling an RF modem for...
5889817 Communication system with data comparison circuit  
A communication apparatus includes an automatic reception stop circuit. When a transmit frame sent by another communication apparatus is received, the automatic reception stop circuit compares the...
5887029 Method of scheduling spatially separated control events with an industrial controller  
A coordinated system time is established for spatially separated components of an industrial control system using synchronizing messages transmitted over a communication link between those parts....
5878142 Pocket encrypting and authenticating communications device  
A portable security device is disclosed which can be carried by an individual and connected directly to telephone circuits to both authenticate that individual and encrypt data communications. The...
5864592 Timing recovery system for digital subscriber line transceivers  
A coordinated timing technique is disclosed which allows a single analog-to-digital converter (ADC) to be timeshared by multiple digital transceivers operating on independent subscriber loops with...
5864580 Miniature wireless modem  
A wireless modem employs a radio frequency (RF) transponder system components to remotely access the memory of an electrical or electro-mechanical device by providing an exciter/reader/writer (ERW)...
5862211 Automatic simultaneous voice-and-data call setup for remote-site servicing  
Simultaneous voice-and-data (SVD) modems (106, 156) are employed automatically in a call initiated between a telephone (111) of a remotely-serviceable communications switching system (101) and a...
5848098 Personal base station extension calling arrangement  
A base station includes a digital signal processor, the base station operable to communicate with at least first and second wireless terminals using compressed digital signals modulated onto a...
5838723 Dual 10BASE-T and 100BASE-TX transmission termination circuit  
A transmission termination circuit able to reduce transmission signal reflections and resultant data corruption such that a single network may selectively communicate data using either a voltage...
5825815 Dual UART device with a reduced package pin number  
A circuit arrangement between an input/output (I/O) integrated circuit (IC) and an I/O coupler IC includes a first universal asynchronous receiver-transmitter (UART) and a second UART provided...
5825814 High speed, high and medium frequency communication system  
A high frequency, high speed data communication system for providing electronic mail, file transferring, Internet access, weather forecasts and other database and communication options to remote...
5822367 Digital mobile data communication system  
A digital mobile data communication system includes a protocol converter in an exchange which simultaneously activates an FEC protocol receiver in a radio communication zone for modem...
5815528 Interactive communication circuit for selecting a transmitting circuit to generate signals  
Preventing signals from undesirably entering and enabling interactive communication. Signals from a main line or branch line are received by receiving circuits. Signal detecting circuits detect...
5802153 Apparatus and method for interfacing between a communications channel and a processor for data transmission and reception  
An apparatus (101) and method for interfacing between a processor (103) and a communications channel (105), the processor operable in data terminal equipment (102) such as a computer having a...
5793802 System including mobile radio station and base radio station  
A mobile radio station for communicating with a beta system can be constructed without providing means for calculating optimum tap gains, the size of a device can be reduced, and power consumption...
5787111 Transportable communication system  
The present invention relates to a transportable communications system that may be used to provide supplemental communications to a geographic region. The transportable communications system may be...
5784633 System for obtaining status data unrelated to user data path from a modem and providing control data to the modem without interrupting user data flow  
A system and method for providing for simultaneous transmission of user data (the I/O data between a source DTE and a destination DTE) and control and/or status data (the data that the DTE conveys...
5765110 Cellular telephone with wire connection function  
A cellular telephone with a wire connection function has a unique telephone number assigned thereto and has a function of performing a wire speech communication upon connection to a wire telephone...
5761245 Method and a system for redundancy control of baseband channels in a telecommunications system  
A method and a system for performing redundancy control of the baseband primary channel interfaces of a plurality of mutually substantially identical receivers in a digital transmission device,...
5761253 Method and apparatus for signal transmission  
A method and an apparatus for enabling a data signal to be transmitted stably at high speed over long distances without using thicker cables and without increasing physical quantities of such...
5757677 Compensation for differences in receiver signals and in satellite signals  
Method and apparatus for compensating for the differences in time varying signals S(t;R;S) received and processed by two signal receivers (R 2 and R 3 ), located at the same site, from two signal...
5757282 Low rate telemetry channel  
Low rate telemetry transmission between a transmission side and a receiving side is accomplished at the transmission side on digital information in a channel at a predetermined bit rate by...
5748675 Vehicle communications network with improved current sourcing  
A vehicle communications network is provided which includes a ground translation circuit and interfacing transmitter circuits that achieve smooth current sourcing transitions. Included is a...
5742640 Method and apparatus to improve PSTN access to wireless subscribers using a low bit rate system  
A method of cellular communication among a subscriber unit, a base station and a switch controller is provided which comprises the steps of digitally encoding speech signals at the subscriber unit;...
5719856 Transmitter/receiver interface apparatus and method for a bi-directional transmission path  
A transmitter/receiver interface (12) for use with a bi-directional transmission path (18) couples a transmitter (14) and a receiver (16) to the bi-directional transmission path (18). The...
5715274 Method and system for communicating between a plurality of semiconductor devices  
Serial high speed interconnect devices are integrated with semiconductor devices for simple and reliable communications and control between a plurality of semiconductor devices. The serial high...
5708680 Network utilizing a controller and base transceivers to route voice packets  
Improved apparatus for a radio communication system having a multiplicity of mobile transceiver units selectively in communication with a plurality of base transceiver units which communicate with...
5691713 Communication apparatus allowing a receiver to recognize a generalized situation of a sender  
In a transmitting section, image data, voice data and screen data indicating situations of a sender are produced, and converted to generalized situation data by, for instance, thinning those data....
5687188 Method of producing an adjusted metric  
A method voting multiple messages begins with a communication unit (111) transmitting (301) a message. At each of a plurality of sites, the message is received (303) and decoded (305) such that a...
5684825 Independently switched voice and data calls using a simultaneous voice and data modem  
A central office of a public switched telephone network has a modem pool that includes both simultaneous voice and data (SVD) capable modems and standard, e.g., CCITT V.32 compatible, modems. A...
5682403 Spread spectrum communication network signal processor  
A base station communicates with a plurality of mobile stations over a cellular network. In one embodiment, the base station includes a receiver configured to receive inbound information from the...
5675613 Distortion compensator  
In order to carry out high-precision control of distortion compensation, a received signal is split into two signals. One of the resulting signals ("the first signal") is provided to a distortion...
5671251 Apparatus and method for a data communications device to selectively operate as an analog modem, as a digital modem, and as a terminal adapter  
An apparatus and method for a data communications device to selectively operate in a plurality of analog and digital modes, including as an analog modem, as a digital modem, and as a terminal...
5668830 Digital phase alignment and integrated multichannel transceiver employing same  
A synchronizer and phase aligning method that provide signal smoothing and filtering functions as well as slip-cycle compensation, and allow for multichannel digital phase alignment, bus deskewing,...
5666383 Variable rate discrete multiple tone bidirectional transmission  
This invention provides a method and apparatus for providing easily adaptable and select transmission and reception rates between a number of clients and a server. With this invention a broadband...
5657324 Bidirectional communication system  
A bidirectional communication system for communicating signals between a master device (1) and a slave device (2) connected by a single wire (3), in which the master device (1) includes a voltage...
5650999 Voice over data communication system  
A system for full duplex real time two-way voice and data communication between a pair of computer terminal locations is disclosed. Analog voice signals are converted to digital form at one...
5648990 Radio accessory for communicating with a programmable computing device and method therefor  
A radio accessory (20) for a personal computing device (50) has a receiver (30) and an interface circuit (32) for receiving and digitizing paging signals modulated on a radio frequency carrier. The...
5644570 Arrangement for connecting a computer to a telecommunications network, and a method for bit rate adaptation in this arrangement  
A method for performing a bit rate adaptation of a data channel that exchanges information between two units operating at different transmission rates. A data stream is divided into at least one...
5640433 Conversion of synchronous/asynchronous signals  
A processor controlled test set is disclosed for testing special service circuits of a telecommunication system. A microprocessor controls the overall operation of the test set, while a digital...
5633890 Method for intelligent data terminal equipment (DTE) data communication  
Method for two-way digital communication between Data Terminal Equipment (DTE) and Data Communication Equipment (DCE), includes a novel command set. The inventive method involves initiating...
5627858 Multi-channel autobauding circuit  
A system and method for data transfer. The system determines the baud rate of a plurality channels carrying of asynchronous data streams by measuring a time period T between the beginning of a...
5623512 Rate converting device capable of determining a transmission rate as desired  
On converting an input data signal having a first transmission rate into an output data signal having a second transmission rate different from the first transmission rate, the input data signal is...
5617455 Interface method and device in digital signal processing system  
An interface method and device in a digital signal processing system which stores digital data regenerated from a recording unit in a memory, reads the digital data from the memory in response to a...
5604768 Frequency synchronized bidirectional radio system  
A bidirectional radio system for low-cost high-throughput accumulation of data from a large number of site units. Frequency synchronization is achieved at low cost by transmitting a high accuracy...
5602878 Method of delivering stable data across an asynchronous interface  
The present invention relates to a method and apparatus for asynchronously transferring data from a first synchronous sequential logic circuit which derives its clock source from a first clock to a...
5600469 Optical network unit implemented with low-cost line interface cards  
In an optical network unit of an optical access network, an optical receiver is connected through a single-mode fiber optic link to a central office for receiving therefrom an ATM cells having a...
5592510 Common mode early voltage compensation subcircuit for current driver  
In a driver circuit for a twisted pair cable, a compensator for preventing appreciable common mode current flow into or out of the twisted pair cable in response to the device receiving a wide...
5592511 Digital customized audio products with user created data and associated distribution and production system  
A system for creation of user-selected customized audio products, defined as a plurality of songs from different recording artists recorded on a single compact disc (CD) or digital audio tape (DAT)...
Matches 401 - 450 out of 539 < 1 2 3 4 5 6 7 8 9 10 11 >