Check your network devices regularly
Network Alarmer is a lightweight software created to offer you the ability of verifying availability of various network devices by checking their IP addresses and warning you through automatic phone calls or email messages, when something goes off course.
You can add various IP addresses to the “PING Hostname List” and the utility will verify whether or not they are online, informing you of the result with a timestamped notice in the lower part of the window.
In addition to checking using ping, the program is also able to check the state of air conditioning machines through user-defined IP, supporting multiple devices at once. You can even set a maximum temperature level which the application should send you a phone call or an email message.