Global chat has been replaced with the dispatch texting system. It's not too realistic or non-meta to allow people to use one channel to send comms to everyone on the server. Plus with a server as big as ours we will be constantly mic-spammed by all the comms so no others can get through.
Gaher in the Y menu click the cell phone option and you will see three options text message(with a drop bar to pick a recipient),then there is text police and text admin.
Side channel(it's cyan blue) is the closest thing to global for civilians(Cops can't see it) and voice chat is prohibited in it.