Download from mumble.info and install.
Follow the first run wizard.
Click on Server / Connect on on the globe icon.
Click on Add New...
Insert the server address und your Username.
| Setting | Value |
|---|---|
| Address | mumble.trellmor.net |
| Port | 64738 |
| Username | Your username |
Click OK.
Then select the Server from the list and click Connect or simply double click on the server.