I have TS3 server from my "haunted" game servers network.
I can give this server for ICC.
IP : 91.121.55.41:13683
Currently server has ONLY default channel and 100 slots.
We had (I'm not sure, but it may still be running) a Mumble serverĀ and it wasn't really used (maybe once or twice), so I guess we don't need another voice chat server.
Voice chats are useful if majority from the group have some fixed time (like we had in Saturdays on IRC), but quite useless if there are max.2 persons at once. We don't even have some bigger discussions on IRC, where we have some logs and we can answer to person who is offline at the moment, there is no discussions on forum or Trello. So voice chat aren't currently a thing that somebody would use.