Abstract: The embodiments of the disclosed invention provide apparatuses, systems, and methods for preventing ground collisions or physical contact between a vehicle and nearby objects. In various embodiments the vehicle can comprise an aircraft and the nearby object can comprise a hangar. Embodiments of the invention can provide a proximity warning triggered by changes in certain electrical characteristics of the vehicle body relative to its surroundings, said changes responsive to the separation distance between the vehicle and nearby objects, persons or structures.

Abstract: Systems, methods and apparatuses for determining the location, direction of travel and other parameters of wheeled vehicles such as cars and trucks being driven along public roads and highways based on sounds produced, transducers and digital signal processing.

Abstract: An embodiment of the invention is a client on a local area network that periodically and automatically evaluates its physical connectivity with the local area network, exercises local-network services such as DHCP, and verifies Internet connectivity and function by pinging one or more numerically specified IP addresses and by pinging one or more IP addresses specified by an FQDN (Fully Qualified Domain Name) known to the assigned DNS servers. An embodiment of the invention may include a plurality of client elements monitoring one or more networks. Functionality according to embodiments of the invention can send notices, automatically initiate action, and otherwise assist in, among other things, remote monitoring and administration of networks, and particularly wireless networks.

Abstract: An embodiment of the invention is a client on a local area network that periodically and automatically evaluates its physical connectivity with the local area network, exercises local-network services such as DHCP, and verifies Internet connectivity and function by pinging one or more numerically specified IP addresses and by pinging one or more IP addresses specified by an FQDN (Fully Qualified Domain Name) known to the assigned DNS servers. An embodiment of the invention may include a plurality of client elements monitoring one or more networks. Functionality according to embodiments of the invention can send notices, automatically initiate action, and otherwise assist in, among other things, remote monitoring and administration of networks, and particularly wireless networks.

Abstract: A lockbox that includes an access device reader configured to obtain a key code from an access device, an access control system, operatively connected to an access administration system, configured to grant access to the lockbox when the key code is verified, and a bidirectional programmable multitap (BPMT) comprising a microprocessor and a tap, wherein the BPMT is controlled by the access control system and wherein the BPMT is configured to send status information about the tap to the access control system.

Abstract: Systems for connecting PSTN lines to telephones, handsets, computers, telecopy machines and other end user interfaces or consumer electronics devices in a residence or business. Systems according to the present invention include Network Control Units which form the center of a star topology and which communicate via RF link with Wireless Access Units and handsets. Wireless Access Units feature an interface, such as, for example, a standard telephone jack, for accommodating a telephone, a fax machine, a compute modem or other device. Computers or other devices may also be accommodated by Wireless Access Units having other physical and virtual interfaces, including, for instance, serial ports or network interfaces. The Wireless Access Units may also be digital to accommodate ISDN for any other digital standard.

Abstract: Systems for connecting telecommunications infrastructure lines to telephones, handsets, computers, telecopy machines and other end user interfaces or consumer electronics devices in a residence or business. Systems according to the present invention include Network Control Units which form the center of a star topology and which communicate via RF link with Wireless Access Units and handsets. Wireless Access Units feature an interface, such as, for example, a standard telephone jack, for accommodating a telephone, a fax machine, a compute modem or other device. Computers or other devices may also be accommodated by Wireless Access Units having other physical and virtual interfaces, including, for instance, serial ports or network interfaces. The Wireless Access Units may also be digital to accommodate ISDN or any other digital standard.

Abstract: A method and apparatus for automatic area code dialing includes a processor, software, and a memory for storing telephone numbers. At a dial tone, a caller dials a ten digit number. The processor sends an area code dial request to the caller for future calls. The caller can confirm the request of the dialed number as a frequently-dialed number. The processor stores the number as a seven-digit portion and an area code portion. On subsequent calls to only the seven-digit portion of the number, the processor compares the seven-digit number to a group of stored numbers. If a match is found, the processor transmits both the seven-digit number and its corresponding area code.

Abstract: Systems for connecting telecommunications infrastructure lines to telephones, handsets, computers, telecopy machines and other end user interfaces or consumer electronics devices in a residence or business. Systems according to the present invention include Network Control Units which form the center of a star topology and which communicate via RF link with Wireless Access Units and handsets. Wireless Access Units feature an interface, such as, for example, a standard telephone jack, for accommodating a telephone, a fax machine, a compute modem or other device. Computers or other devices may also be accommodated by Wireless Access Units having other physical and virtual interfaces, including, for instance, serial ports or network interfaces. The Wireless Access Units may also be digital to accommodate ISDN or any other digital standard.

Abstract: A wireless telephone subsystem for coupling line type telephony equipment to the public switched telephone network is described. A base unit is provided which is adapted to be coupled to a plurality of lines of the PSTN. The base unit includes a base coder/decoder which transforms analog signals received from the lines of the PSTN to digital signals and conversely transforms digital signals to analog signals for coupling to the lines of the PSTN. The base unit includes a multiple channel transceiver coupled to the base coder/decoder which responds to the digital signals provided by the base coder/decoder for transmitting those signals by placing selected portions of the digital signals into selected portions of a multiplex frame. The base multiple channel transceiver also receives digital signals and couples those digital signals to the base coder/decoder. Programmable switching is provided to associate selected of the PSTN lines and selected portions of the multiplex frame.

Abstract: A wireless telephone subsystem for coupling line type telephony equipment to the public switched telephone network is described. A base unit is provided which is adapted to be coupled to a plurality of lines of the PSTN. The base unit includes a base coder/decoder which transforms analog signals received from the lines of the PSTN to digital signals and conversely transforms digital signals to analog signals for coupling to the lines of the PSTN. The base unit includes a multiple channel transceiver coupled to the base coder/decoder which responds to the digital signals provided by the base coder/decoder for transmitting those signals by placing selected portions of the digital signals into selected portions of a multiplex frame. The base multiple channel transceiver also receives digital signals and couples those digital signals to the base coder/decoder. Programmable switching means is provided to associate selected of the PSTN lines and selected portions of the multiplex frame.

Abstract: The present invention comprises the digital implementation of a spread spectrum communications system including a spread spectrum modulator or transmitter and a spread spectrum receiver or demodulator. The demodulator, as modified with optional techniques, operates at zero I. Under these circumstances the receiver is susceptible to 1/F noise, as well as transient overloads. The addition of a high pass filter stage to only the receiver, in a communication system, without modifying the transmitter, will be recognized by those skilled in the art as violating the basic precepts of communications which attempt to tailor the characteristics of a receiver and transmitter to each other. However the applicant has found that demodulating RZ encoded data with an added high pass filter results in the production of Manchester data which is one of the forms of data encoding that can be handled by the demodulator.

Abstract: The present invention comprises a digital implementation of a spread spectrum communications system including a spread spectrum modulator or transmitter and a spread spectrum receiver or demodulator. The demodulator, as modified with optional techniques, operates at zero IF. Under these circumstances, the receiver is susceptible to 1/F noise, as well as transient overloads. The addition of a high pass filter stage to only the receiver, in a communications system, without modifying the transmitter, will be recognized by those skilled in the art as violating basic precepts of communications which attempt to tailor the characteristics of a receiver and transmitter to each other. However, applicant has found that demodulating RZ encoded data with an added high pass filter results in the production of Manchester data which is one of the forms of data encoding that can be handled by the demodulator.

Abstract: A spread spectrum communications system resistant to multipath due to differential delays equal to or less than a chip width. At the transmitter, a pseudonoise sequence is combined with data for transmission purposes and the result of that combining operation is then encoded. Manchester encoding or differential encoding are described. At the receiver, a differential demodulator is used with a delay of either a one-half chip width or a full chip width. In the receiver embodiment employing a one-half chip width delay, a notch filter is used at the output of the demodulator with a notch located at a frequency corresponding to the chip rate. The output of the notch filter is then input to a low pass filter. The output of the low pass filter is a base band signal which can be applied to a correlator to extract the original digital data. For the receiver embodiment which employs a full chip width delay, the output of the demodulator is applied to a low pass filter.