MyPBX U300 Administrator Guide
116
Dead Time
The time after which heartbeat keep-alive packets do not get
response, the system would confirm the failure of the other
MyPBX. If you set this too low you will get the problematic
cluster partition problem. The default value is 120 seconds.
Note:
we recommend that the time should be greater than the
restart time. Otherwise the standby MyPBX will be activated
while the active MyPBX restart.