The NEC SL1100 External Backup Battery Box (1100024) connected to each KSU power supply, the external backup battery provides DC power in case a loss of AC power occurs. An optional (locally procured), external battery source can be used to provide power during a power failure.
The NEC SL1100 External Backup Battery Box: Connect this box to the power supply at each KSU, Wall/floor-mountable, One KSU can be mounted on the Battery box, Backup duration is approximately one hour.
We have many NEC phones in stock. We can design a custom solution to fit your need. We can also install your used NEC telephone system anywhere in the nation. Call 1-888-234-4975 for more information.