If you are an administrator, you can enable the Split Registration Prevention feature. If the main server is reset or the network splits, causing a gateway to deregister, the following sequence of events occurs:
The gateway registers with the survivable server.
The survivable server reports its active status to the main server.
The main server deregisters all gateways and telephones in the regions backed up by the survivable server.
The main server enables the endpoints in those regions to reregister when the day and time specified in the time-day window is reached or until the enable mg-return command is run.
