Widespread PoE and PoE+ issues
Widespread PoE and PoE+ issues
Hello everyone, I have an UDM with two PoE+ ports and six PoE ports. I’m considering the recently announced G6 180 camera, but it mentions it requires PoE+. My two PoE+ ports are already used by two APs that need PoE+, so I’m wondering why it specifies PoE+ instead of just PoE. It says the camera supports up to 15 watts, and my regular PoE ports handle 15.5 watts. Will using PoE+ work without issues? Also, since the run is far from my basement to the front of my house, what are the implications?
Frankly, you're better off asking this on the Ubiquiti forum ( https://community.ui.com/ ), because people there are more knowledgeable about the specifics of each product. Higher likelihood of someone having one.
Aligned with @TudorF, typically requesting PoE+ but only receiving PoE may result in a reduced power state or failure to boot. Check the UI community for further insights and share any findings here.
The “15W” and “15.5W” figures you mentioned don’t match exactly. PoE ports following the 802.3af standard deliver up to 15W from the source device but only provide about 12.95W at the end device. This gap comes from the longest cable allowed with the least efficient cable type. PoE+ devices (802.3at) offer 30W at the source but cap at 25W at the device. If your equipment needs up to 15W, it fits within the PoE+ category.
Yes, you'd need to purchase a PoE+ injector and connect it to your PoE switch.
To ensure complete safety, everything looks good. The data port from the injector won’t be mistaken for a PD by the UDM-SE. Make sure you don’t link the POE-out connector (the lightning bolt one) to the UDM-SE. Still, the “15W” rating is the upper limit, and such devices rarely reach it—though this unit is new enough I haven’t observed typical operation. If your setup is shorter than 100 feet and you use high-quality cable (avoiding copper clad aluminum and opting for solid core), voltage drop will be minimal. In short, it should function safely on the PoE port, with only a rare risk of port shutdown in extreme cases.
For specific Unifi APs, an alternative approach exists if you wish to switch from PoE+ to PoE without problems. Through the Unifi app, devices such as my U6-LR—typically requiring PoE+—can be adjusted using a feature called Low Performance Mode. This adjustment reduces the radio's transmit power so it stays within PoE limits. If this affects your experience negatively, consider skipping the change and opt for a PoE+injector instead.