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• HA Cluster IP (mandatory):
This is the IP address for the UCM that provides PBX service in HA setup. This IP is always
associated with the UCM in active status. For example, when configuring IP phone to register to
UCM, this is the SIP server IP address to be configured on the IP phone. When configuring SIP
peer trunk, this is the SIP server IP address to be configured as peer trunk server IP. In HA setup,
the static IP configured for each UCM will not be used for PBX service directly. Normally the cluster
IP address is in the same subnet as the static IP address configured on the UCM.
• HA Peer IP (mandatory):
This is the static IP configured on the peer UCM in HA setup. This is used for notifying GDMS when
active and standby roles change.
• Peer MAC Address (optional):
This is the MAC address of the peer UCM in HA setup. It is used for UCM with Remote Connect
service to configure the MAC address of the peer UCM.
• Heartbeat Port (mandatory):
This is the port used for communication between active and standby UCM for heartbeat negotiation.
It is recommended to use the default port number 9527.
• Heartbeat Timeout Period (mandatory):
This is the timeout period for heartbeat (in seconds). The standby UCM will check regularly whether
the active UCM is working normally. If the standby UCM detects that the active UCM has been
disconnected for this period, the standby UCM will consider the active UCM in faulty state and will
then automatically take over as active UCM.
• Software Fault Switch:
If enabled, when the active UCM experiences software failure such as system crash with core dump
generated, it will trigger failover automatically and the standby UCM will take over. If disabled, HA
alert events will be reported without failover.
• Hardware Fault Switch:
If enabled, when the active UCM has hardware failure such as FXO port no longer working, it will
trigger failover automatically and the standby UCM will take over. If disabled, HA alert events will
be reported without failover. Please note plugging or unplugging telephone cable on FXO port is
not considered as hardware failure.
• Force Switch:
This will force active and standby UCM to switch roles. It will trigger the standby UCM to take over
and switch the active UCM to standby role. This should be used only when necessary, such as
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