Back before police departments went digital (on the radio), Parma Hts, Brooklyn and Lyndale shared the same frequency. 39.020 Mhz. When Parma Hts officers would call the station, instead of saying "radio" or "base" the way most of them would do, they call "704". IE, "Car 15 to 704". Do not remember what the other two said, but I was a huge fan of Parma Hts back then. Where on EARTH did "704" come from and what did it mean? Zip codes were 44129 and 44130, so that wasnt it, but that has bugged the HELL out me for a very long time.