IDOT on Old 800 Mhz System
I wondered too. I believe this is very old and outdated info from the original ISP's Motorola Smartnet 800 Mhz Analog Trunked System? which used to carry Dist15, (etc all) and the Maintenance Trucks. I used to listen to this all the time and then everything went Starcom. But I always heard IDOT trucks on analog 453 Mhz and 151 Mhz and then they went P-25 conventional digital and I was boiling mad. No money for new scanners back then, and just mad at everything going to these new complex digital systems.
I think that 800 Mhz system (the frequencies, equipment, towers) were all re-purposed into the Starcom system. I have 10 yr old Carma printouts and older Police Call books which have this system listed as you found. N9JIG, Rich might know, but anybody else?