Among the many checks it can do, it can monitor any TCP service, ping a host, retrieve an URL, check the available disk space, and more. It checks network servers at regular intervals and takes pre-defined actions if a device does not respond. It can provide a visual and sound warning, send an E-mail message to a mailbox, pager or mobile phone, execute another program, etc. All this allowing you to respond to a problem before your users start to complain