Teletec Corporation

Aaron S Rogers

John P Fussell

Kaspar A Kasparian

John D Ide

Ming C Hsu

Ming-Chyuan Hsu

A Computerized Mobile Two-Way Radio System is provided having microprocessor enhanced capabilities and versatility for wide area/multiple region two-way radio networks with multiple categories of users and adaptability to multiple international standards and mobile radio equipment configurations. The main elements of the system consist of (1) a microprocessor-based Control Unit, (2) a Digital Serial Interface/Link and (3) a microprocessor-based Convertible Transceiver Unit. The Control Unit provides many facilities and capabilities for the operator and the system in compact form. The Interface/Link provides a two-way path for serial data consisting of digitized audio and digital command and status signals. The Transceiver Unit is designed for operation and control over the Digital Serial Interface/Link. The system allows the addition of many options, capabilities and peripheral/extenal devices including builtin front panel or remote programmability, built-in autodiagnostics, remote takeover of controls, remote memory-dump, remote diagnostics, program cloning capability, voting on all channels, 512 channel (expandable) programmability within 16 groups (expandable), triple levels of priority within each group (expandable), supreme over-ride channel, RS232C Interface Ports for data applications, phone patch for voice and for world-wide telephone linkable devices and other capabilities.

Computerized multistandard, field-convertible,

A digital serial interface system is provided for communicating digital signals including digitized audio between microprocessor-based Control and Transceiver Units of two-way radio communications equipment. The system of the invention essentially comprises three subsystems: (1) an interface in the microprocessor-based Control Unit, (2) an interface in the microprocessor-based Transceiver Unit and (3) a two-way medium for linking the two units. Various signals and audio in the Control Unit interact with a software-driven microprocessor of the Control Unit and are digitized and then translated into a serial format, organized in channel groups through a TDM (Time Division Multiplex)/PCM (Pulse Code Modulation) process and transmitted in frames through a two-way medium to the Transceiver Unit which is also microprocessor-based and incorporates a similar interface. The digital data communicated to the Transceiver Unit then undergoes a reverse process. The Interface System is duplex (bidirectional). A preferred embodiment of the digital serial interface system for two-way radio equipment includes a three channel TDM/PCM bus structure scheme, operated in a synchronous full duplex mode using the Manchester II (Biphase-L) format. Various further embodiments include: an optical fiber link medium between a Control Unit and its Transceiver Unit(s), the addition of remote takeover of programming and controls, audio enhancement of receivers during scanning, encryption/decryption systems, cloning of programs between multiple units, control of multiple transceivers through one Control Unit and other added enhancements.

Bidirectional digital serial interface for communication digital signals

A control system for microprocessor and software enhanced land mobile radio communications systems is provided to increase versatility, capabilities and facilities while providing an easier and more precise control of various radio protocols. As the usage of microprocessors and software is increased in radio communications equipment, additional capabilities, digital protocols and versatility can be desired in such equipment. However, this requires additional and special controls and prior art approaches have limitations with respect to capacity, versatility, size and compatibility with digital protocols. The innovative approach of the invention provides a compact new system to replace prior art multipositional knobs and switches and refines the system of control. The novel control system provides for an efficient utilization of space while achieving outstanding versatility and new operational and control capabilities. This is achieved by advantageously accommodating microprocessors and software based radios by utilizing a multifunctional keypad in combination with a display and command/mode and control switches to access and control a large number of versatile and combined capabilities, operating modes and facilities in a compact form.

Control system for microprocessor and software enhanced communications

A method and apparatus for filling audio blanks in a message received by a receiver resulting from switching the receiver between a plurality of input channels each having a different message for selecting the channel of highest priority is disclosed. A recording and playback device is connected between the receiver and an output channel for recording a given time segment portion of a first message. The receiver is switched to a second channel for a period of time equal to the given time segment for receiving a second message and for determining which channel has a higher priority. The recorded portion of the first message is delivered to the output channel simultaneously with the switching of the receiver to the second channel to repeat the first message portion at the output channel, thereby to fill in the audio blank resulting from switching the receiver between the input channels.

Growing community of inventors

Knightdale, NC, United States of America

Aaron S Rogers