Saturday, April 23, 2011


I recently received a report of someone hearing what sounded like MOTO TRBO digital traffic on 172.9000 MHz in the Southeast Florida area. This frequency is one of the primary TSA channels used at airports across the country.

It would be strange for the TSA to move to TRBO digital radios, as they are part of the Department of Homeland Security, which is committed to utilizing APCO P-25 digital modes for federal interoperability and have been using P-25 digital radios since they came into existence. Plus the TSA has recently tested the addition of OTAR (over-The-Air Re-keying) of the encryption keys on their P-25 radio systems.

However, since the TSA also decided a few years ago to start equipping security checkpoint screeners with Icom F-50V radio with analog voice-inversion, I guess anything is possible.

Has anyone else caught what might be TRBO digital on any TSA channels? Looking for updates...

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