Teamspeak uses a 5,1 KB/s - 16,8 KB/s codec to talk... So, think of 100 people, all being on one server, how much load it would put on that server. just 5,1 KB/s having to be transmitted to 100 people is 5,1 * 100 .. That\'s still 510 KB/s that server would have to have in upload.. Or if two people happen to talk on the same time... Not a good idea. It can be used to talk to friends, or if you play CS, but don\'t expect a MMORPG to have voice communication.