you need to go to crpg server 1 and type an exclamation mark in chat followed by that address, but only on your skip the fun, then it will enable in-game crpg voice comms
Don't be an asshat.
Download teamspeak3 free download.
Use the address given to you in the "connect" tab.
Join and use it up.
Note: If you don't have a mic, there is also a built in chat room. If you do, and you want to use it, go to setup and follow through the instructions. It's also best to use push to talk and not the auto talk. That way there isn't the constant sound of 20 people eating cheetoes