Patent ID: 7313103

Claim:
A communication system comprising: a first communication unit capable of communicating over only a full-duplex persistent-connection link; a second communication unit capable of communicating over only a half-duplex link; and a state machine coupled through a dispatch gateway to the first communication unit over the full-duplex persistent-connection link and coupled through the dispatch gateway to the second communication unit over the half-duplex link, wherein the state machine comprises a processor and a memory, and the processor is programmed to receive full-duplex voice signals from the first communication unit and to generate half-duplex voice signals from the full-duplex voice signals and to receive half-duplex voice signals from the second communication unit and to generate full-duplex voice signals from the half-duplex voice signals wherein the first communication unit communicates with the second communication unit using the generated half-duplex voice signals and the second communication unit communicates with first communication unit using the generated full-duplex voice signals.