Panasonic KX-NS1000 Manual page 365

Isolated Mode
If no PBX is designated as the Backup Master unit, or if the Backup Master unit also goes offline, Slave units
will operate in Isolated mode if they are set to do so.
In Isolated mode, each PBX will provide service to the extensions registered to it and for the trunk lines
connected to it.
Master Unit
PBX
Offline
PBX
Conditions
IMPORTANT
In Backup Master mode and Isolated mode, there are no restrictions on performing software upgrades
(® 5.5.9 Software Upgrading). However, if an upgrade is applied while any unit is offline, the offline unit
will no longer be able to participate in the One-look network because its software version will be different
from the other PBXs' software version.
The One-look network will switch to Backup Master mode or Isolated mode if there is no response from
the Master unit (or Master Backup unit) within a preset Master Site connection monitor time.
•
When the Master unit (or Master Backup unit) recovers, it does not automatically reassume operation as
the Master unit. Operation must be resumed manually through Web Maintenance Console.
•
When operation switches modes (e.g., normal operation to Backup Master operation), service at all sites
is temporarily interrupted. For example, all active calls will be disconnected, including P2P calls.
In this case, all units will restart. Depending on the makeup of the network, it may take 15 minutes or more
for the system to come completely back online.
•
Activation keys are copied and are available to the Backup Master unit or Isolated units for use in their
respective modes. However, trial activation keys will not be available. Copied activation keys are valid for
10 days, starting when the unit begins operation. When operation is returned to normal, this 10 day limit
is reset.
•
During normal operation, system data is copied from the Master unit to all Slave units. System data includes
information such as extension settings, system speed dialling, time mode, etc.
Slave Unit
(Backup Master Unit)
PBX
PBX
Isolated
mode
: Current Connection
: Lost Connection
Offline
Isolated
mode
4.2.3 One-look Networking Survivability
Feature Guide 365