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Extended trunked RF communications systems networking

  • US 5,699,353 A
  • Filed: 11/24/1993
  • Issued: 12/16/1997
  • Est. Priority Date: 11/24/1993
  • Status: Expired due to Term
First Claim
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1. In a first multisite digitally trunked radio frequency communications network including plural repeater sites supporting digitally encoded communications, having corresponding coverage areas and serving mobile or portable digitally trunked radio transceivers disposed within the coverage areas, a distributed control multisite switch for routing communications data between and among repeater sites and other types of analog and digital communications data sources and destinations within said network wherein said communications data includes audio signals and control messages, comprising:

  • a plurality of interconnected communications interface modules, each module comprising circuitry for passing communications data between particular sources and destinations within said network;

    an audio signal bus and a control message bus interconnecting said interface modules, andat least one network interface module interconnected through the audio signal bus and control message bus with said communications interface modules, said network interface module comprising circuitry for transferring and receiving communications data to and from a second multisite network including a control link operatively connected to the second multisite network for transferring control messages between the control message bus and the second multisite network, and an audio link for transferring audio signals between the audio signal bus and the second multisite network, and said network interface module including a processing circuit for selecting audio signals from the audio signal bus to transfer to the second network via the audio link based on control messages received from the control message bus.

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