WS> WHAT ARE EOT's and FRED's?
You're correct -- EOT's (End-Of-Train) and FRED's (Flashing Rear End Devices) 
serve to transmit brake pipe pressure and end-of-train motion to the 
locomotive.  Newer systems will also allow the engineman to apply brakes from 
the rear end and the front simultaneously, which will greatly aid train 
handling (there's a lot of slack run in and run out on a long train) and 
reduce stopping distances.
Nearly all railroads use 457.9375 with 5-watt transmitters, but Norfolk 
Southern uses 161.115 with 10-watt transmitters.
EOT's/FRED's are great for railfans seeking trains -- when you hear a signal, 
you know something's up nearby.  Some railroads are using radio signals to 
set lineside signals, because this allows them to remove hundreds of miles of 
expensive cables.
   ALTO Tower   
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