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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.
• We advise to disable the DECT Base on the Master DECT manager:
  • 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.
  • With backup DM configuration in V2.47.-V2.49 local base of backup DM could even create a conflict with local base of original DM: Keep local base deactivated.
    • As a result:  in V2.47.-V2.49 backup DM MUST NOT be configured for DMs, that have less than 11 base stations
    • An improved backup configuration procedure in future will solve this conflict.
    • But backup-DM configured with V2.4x need to be deleted and reconfigured with V2.50 or younger version.
• Add Back-up DECT manager, today via provisioning only
• No fallback to Master DM. Master will become back-up DM
• Back-up DM does not consume an additional DM license
• Failover when:
  • Backup DM recognizes, that significant majority of base stations are disconnected from master DM
  • Backup DM recognizes, that significant majority of 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>