Amazon.com: PoE Injector, 48V Power Over Ethernet Adapter, 10/100Mbps IEEE802.3af/at Compliant for Most Polycom/Aastra/Ubiquiti/Amcrest/Realink IP Camera and Phones : Electronics
What Is PoE? The Ultimate Guide to Power over Ethernet
Amazon.com: Active PoE Splitter - Power Over ethernet Splitter Adapter, 48V to 12V, IEEE 802.3af Compliant, 10/100Mbps PoE Splitter for Surveillance Camera, WAP and VoIP Phone, up to 100m, 2 Pack : Electronics