To join the mumble server go to google and download mumble.
Then you will probably have to set up sound and mic settings and stuff
then click on connect, add new the
lable: is what ever you want to call it
Address:85.25.73.137
Port:4112
Username:your in-game name.
Then click ok, then select the server and click connect, if you have entered everything correctly then you will be connected to the
servers mumble.
then click on configure and make sure text-to-speech is ticked
then click on configure then settings then on transmit and select push to talk.
On the left of the screen it says shortcuts click on it then if there isint one already click add make it push to talk, then select a button
that you would want to press to talk with ( i personally like ctrl).
then your simply set up and ready to go! ask me for help if u got any problems.
Rangewonk.