Okay so we now have local chat and team radio. Team Radio is just the way it was before the big update in June -- if you aren't Civilians you can type in team chat and only people on the team you chose (maybe Rogues for example) will see what you type.

Local chat is where if you just type a normal message, it will appear totally yellow. What's going on here is only people near you (512 game units or about 4 stories if laid out flat on the ground) can see what you wrote, so like it represents that if you're at TechNoir and someone else is in City Hall there's no way you would be able to hear eachother if you were talking. If you need to say something to everyone just put / before your message. Individual messages to admins via team chat with @ in front still work too. Chat server commands such as /item or /class also work.