If you have devices, server, cctv , etc connected to the internet using Public IP (Internet Protocol), you can monitor and get notification via SMS or email when those devices has no response, so you can determine to solve the problem quickly.

On Internet there are many providers give  notification service, one is pingdom.com
If you need this service you can register at address above. you can  choose paid or free service.
For free service the address is http://www.pingdom.com/free

Setting to Monitor ip address if no response/down :
• After registering complete, you can login and use the service
• Set Your time zone
• After setting time zone, then go to Check Menu  (see figure)
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