All Xeon servers come with dedicated IPMI and iKVM which allows you to access the server directly, even if its down or locked out.
You can download the iKVM launcher from the dedicated servers main manager page by clicking the "Console" button. This will download a Java launcher script and create a temporary session to access your server via iKVM/IPMI. You will need to have the latest version of Java installed to use this module.
Once you load the iKVM console, you will have full control of the server.