AFAIK the Singapore police uses TETRAPOL, not TETRA.These radios were made by Motorola and were the MX300 series. Before the Singapore Police Force installed their TETRA digital system a few years ago, they used the same exact radios that are seen in this photo. Back then the SPF operated on the 482 MHz band.
You saw someone carrying an MX300... recently? Wow!
73s
Ron
http://www.signalharbor.com/73.html said:Making any of these numbers plural (73s, 88s, etc.) is incorrect since they are already plural. 73s would mean best regardses and 88s would mean love and kisseses. Those make no sense.