These are Merticom (now called Cedllnet ) radios that utilities use to automate there distribution systems.  Also for automated meter reading.  They work in the 902 to 928 Mhz band and are spread spectrum frequency hopping.  In some parts of the country (So Cal) there are thousands of these radios in operation.  Northern Illinois has several thousand in operation.  Programmed more of these radios than I like to remember.....
 
Gerry








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