These are what the squads look like where I live. City and private.
I do hope they keep Fire and EMS separate. I believe it will allow for better RP and make it more simulated and realistic with different players being forced to communicate on an incident.
For example, there are different callouts in our city. Alpha, Bravo are used to dispatch just an ambulance say for a medical run. However Charlie and Omega are used to dispatch EMS AND the fire department for things like trauma and an arrest or MVA. And they'll act as EMRs and help with CPR or help the patient until EMS arrives or control traffic with the police.
It'll make for better RP to have that communication between emergency agencies.
Whoops the pictures didn't send