I have one of these to power my POE cameras and WiFi. Works great and easy to get firmware updates. IIRC the latest firmware update was this year. Not bad for an older switch.
Enterasys Securestack C3G124 24P 48 Port External Switch 0647030015156 | eBay
Enterasys Securestack C3G124 24P 48 Port External Switch 0647030015156 | eBay