radio call sign

Hey Guys, can anyone provide information about Beverly Hills Police Department callsigns (service identification letters if applicable), radio codes and procedures? I am familiar with LAPD, LASD, CHP, RSO, etc. communications and expect BHPD to be heavily influenced by the two big departments...

Does Anyone have a current list of radio call signs? The wiki doesn't list a lot of the new units I am hearing. For instance, in weber county sheriff talk group. Call sign "1J" (1 Juliet) is not listed (If I had to guess I will assume these are outside jail perimeter patrol/transport units)...