All servers that are managed by our company are added to a monitoring system called Nagios. It is a system and network monitoring application that automatically checks each server every 1 minute to ensure the server is online. It will notify a systems administrator if there is a server that is not online. Here are some screenshots to show you what this program looks like...
(green = online)
Customers who have two or more servers with us will receive access to Nagios with their own private login, showing the status of their own servers. You will also be given the choice of having server notifications e-mailed and/or paged to you.