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From software 2.47 DM redundancy for testing is implemented.

• DECT manager redundancy needs working integrator:
  • Implementing backup DM without planning redundancy for integrator has limited value.
  • For DM redundancy it is recommended to plan redundancy for VI by the machine virtualization.
  Needs virtual integrator (for integrator redundancy)
• We advise to disable the DECT Base on the Master DECT manager as this redundancy is not for the DECT Base on the Master DM. If you have the DECT Base enabled on the Master DM, see this page about the technical requirements:
  • The backup DM and the DM redundancy feature can only provide redundancy for the DM role, but not for the local base functions!
  • Therefore you should not plan with the local base, if you are planing for DM redundancy.
• Add Back-up DECT manager, today via provisioning only
• Failover will happen after approximate 10 minutes
• No fallback to Master DM. Master will become back-up DM
• Back-up DM does not need consume an additional DM license
• Failover when:
  • Backup DM recognizes, that ( significant number majority of , all ) base stations are disconnected from master DM
  • Backup DM recognizes, that ( significant number majority of , all ) base stations are connectable to backup DM
    _{significant >= ( 60% + 1 of active base stations}
    
    
  • this situation continuosly lasts for more than 7 minutes this way preventing failover under regular software update duration (6 minutes).

<?xml version="1.0" encoding="UTF-8"?>
<provisioning version="1.1" productID="e2">
    <nvm>

    <oper name="add_backup_dm">
        <param name="DMPpasswd" value="Gigaset123+"/>
        <param name="DMDisplayName" value="dm2"/>
        <param name="DmBackupFor" value="dm1"/>
    </oper>

    </nvm>
</provisioning>