just to be clear we are not talking about talkgroup ids . we are talking about radio ids . each radio transmitts a id . big diffrence here
example:
car 21 might have a radio id of 123456
the officers handheld has 45678 id
the dispatch console has 98765 id
all these will all talk on tg 12345
how do u think when a emergency button is pushed they know who it is .
in the early trunk scanners you could enter the radio id as a talk group and just listen to that .
example i had a friend that was a officer . and i just pluged his car radio. handheld id and just listened to him . no dispatch just him talking .
all you would hear was him going 10-23 , 10-8 , running plates thats it