Cassidian Communications, Inc.

Plant Equipment Inc.

Cml Emergency Services Inc.

Global Traffic Technologies, LLC

Douglas Gordon Roberts

Pierre Olivier

Jerry Lee Johnson

A priority control unit is provided for use with light-based and GPS-based traffic control priority systems. The priority control unit includes a light emitter subsystem that is configured to emit pulses of light. The pulses of light encode a priority request for activating preemption of a traffic signal by a light-based traffic control priority system. The priority control unit also includes a GPS-based subsystem that is configured to transmit a priority request by radio waves. The priority request from the GPS-based subsystem is for activating preemption of a traffic signal by a GPS-based traffic control priority system. A switch is coupled to the light emitter subsystem and to the GPS-based subsystem. The switch simultaneously activates both the light emitter subsystem and the GPS-based subsystem for transmitting priority requests in response to user control. In another embodiment, the priority control unit further includes a broadcast based subsystem for transmitting priority requests.

Systems and method for controlling preemption of a traffic signal

A method and system for dispatching calls using a packet network is disclosed. The use of distributed call management modules, enables various communication systems, such as RF and PSTN systems, to communicate with each other over the IP network. Audio devices from the various communication systems are each assigned an IP multicast group. Distributed call management modules covert signals from the audio devices into IP packets and transmit the IP packets to designated IP multicast groups over the IP network.

Internet protocol radio dispatch system and method

A method, system and memory are provided for enabling interoperability. A communication session between different communication systems, such as radio systems, operating using different protocols is initiated by receiving a scenario identifier from one of the user devices. An interoperability server receives the scenario identifier and accesses interoperability data to obtain the connection information corresponding the scenario matching the scenario identifier. The data includes scenarios for communication sessions and the connections required for each scenario. Once the interoperability server obtains the connection information, the communication session is initiated.

Radio interoperability system and method

A method and system for dispatching calls using a packet network is disclosed. The use of distributed call management modules, enables various communication systems, such as RF and PSTN systems, to communicate with each other over the IP network. Audio devices from the various communication systems are each assigned an IP multicast group. Distributed call management modules convert signals from the audio devices into IP packets and transmit the IP packets to designated IP multicast groups over the IP network.

A radio gateway system and method for interfacing one or more radio systems and a packet network. The system comprises a plurality of gateways, each gateway including a radio interface port, a protocol converter and packet interface. The gateways convert audio and signaling from the radio system into packet signals in a generic protocol. The gateways also convert packet signals in the generic protocol into audio and signaling in a protocol understandable by a respective radio system.

Growing community of inventors

Richmond, CA, United States of America

Douglas Gordon Roberts