Channel 1 = grey text = All
Channel 2 = green text = Country
Channel 3 = purple text = Local / Range
Channel 4 = red text = Squad or maybe mission even
Channel 5 = Voice / Vox
Also these channel can be re arranged in any order you desire. They do not have to be as listed. You can also tune privately to an individual by replacing/deleting/backspacing out the channel number/name and typing in the individuals name, or even type in a different channel number ( any number not referenced above will be Yellow text)
and you can tune your Voice / Vox ( Channel V ) to a different channel as well or leave it on mission or squad.
You use T to talk on channel V and F12 to talk on Local Range.
hmm.....did I leave anything out, that should cover your question....