Adding IP cameras using a PoE Switch connected to NVR PoE Port

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In this quick video we show how you can use a PoE switch connected to an NVR PoE port to power and connect a camera. This is also useful when extending the cable run for a camera over the 300ft limitation because the PoE switch can forward the power and data another 300ft.
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48v is nvr port output it dont demage poe switch ???

Imkerei