This is the procedure for creating and maintaining a highly available phone system using our appliances. It consist of two appliances, "hot" and "cold". "Hot" is an active appliance providing all services. A "Cold" appliance is identical in appliance but is not used and remains turned off. In case of hardware failure on a "hot" appliance, the "cold" appliance will be used to continue providing services. Here is how:

First you must backup the "hot" appliance by using one of our backup procedures.

This will make a backup of your system's current state.

To restore the latest backed up state to a "cold" appliance you will transfer your backup file to "cold" appliance and restore using this procedure.

This will restore your latest system state on the standby appliance.

NOTE: Only one license key is used in this situation which means that your Account manager must prepare it for cold standby. Only "hot" appliance must be licensed. "Cold" appliance doesn't need to be licensed as it is already using the system from "hot" system which is already licensed with this special license number.