Panasonic NS1000 Manual page 243

1.1 UPS Connection and setting (2)
1. Connect the UPS as described in the Installation manual
2. Set the NS1000 Shutdown threshold via the WebMC
Maintenance -> Status -> Equipment Status -> 1. UPS
UPS Status can be seen here
Set the UPS Battery Level, that
when reached, will cause the
PBX to Shutdown
NB: UPS Status alerts can also be sent via email.