Amazon.com: PoE Texas 4 Port 24V Passive PoE Injector with 24V 30W UL/FCC Certified Power Supply - Gigabit Injector - Passive Power Over Ethernet Multi Port PoE Adapter for Ubiquiti, Mikrotik, 24
24-Port Gigabit Rack Mount PoE Injector with 56V240W Power Supply
WS-POE-24-48v120w 24 Port Poe Injector - 48 Volt Power over Ethernet for IP Phones and Other 802.3af Devices at 10 100 data rates and 120 Watts Total : Amazon.in: Electronics
24-Port Gigabit 802.3bt Managed PoE Injector
24 Port Gigabit Poe Injector 10/100/1000m 15.4W Poe Injector - China Poe Injector, Power Supply | Made-in-China.com