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Battery back-up power supply / DC / ISDN - 24 V, 8 Ah | DP240e
The DP240e is a bulk powering system that provides 48 volt DC power for up to 48 NT1s and 96 ISDN phones. Integrated battery backup ensures continuous phone service in the event of local power outages. The system controller protects the batteries from over-discharge via a low voltage disconnect circuit. It performs an automatic battery test and indicates when the battery needs to be replaced. The battery is replaceable without taking the phones out of service. Remote monitoring is provided via relay contact closures or SNMP with the optional Power Management Package (PM).