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By Neil Horden
When we think of public safety communications, we most often think of police, and fire, and the Two-Way radios they use. While much has changed about these systems over the years, the fundamentals of Two-Way Push-to-Talk (PTT) communications on a Land Mobile Radio (LMR) system has been a staple. So much so, that we often define our communications requirements as if PTT over LMR is the only viable solution.
