(Triple Mode Power Supply with battery back-up and integrated Ringing Generator)
The power supply, included in the main chassis, has three modes of operation, 110 VAC powered, -48VDC powered and both, with auto switch over from 110VAC to -48DC in the event of a power failure. The power supply also has an integrated battery charger for use with BAT-HE12V7.7 -48VDC batteries. In addition to supplying power to the main motherboard, the power supply also provides the ringing voltage.
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