With TeamSpeak 3 Client you can join a server that already exists. To do so, launch the application and login with your TeamSpeak account or create a new one if you’ve never used TeamSpeak software ...
Since I was the n00b who made the mistake of bringing up Teamspeak in guild chat, I'm being tasked with setting something up. You'd think I'd have learned my lesson by now, but thats a different topic ...