Switch alimentary avec 16 ports alimentés par PoE
Switch alimentary avec 16 ports alimentés par PoE
We're dealing with a pretty tricky issue at work involving Chinese network switches that fail when connected equipment powers up. The usual fix is to replace them, since they've been reliable for about two years and mostly worked well. But what if we could prevent the problem entirely? There are PoE-powered switches available—devices that draw power directly from PoE rather than using PoE to run other devices. However, finding 5-port models with this feature is limited, and the documentation is sparse. We're looking for a 16-port PoE switch, which would be ideal since each rack needs around 14 ports. For now, we don’t need anything overly complex; just gigabit speed, no management required, and a metal chassis would be great. If shielding is an issue, aluminum tape could work as a workaround.
The issue should not be related to the main power supply itself, so purchasing a new PoE-powered switch might be a better option. If they previously functioned well but now fail, degradation over time is likely the cause. Repairing the power supplies could address the problem.
You can find POE splitters and extractors on Amazon, including several Asian brands. For more trustworthy options, check Digikey’s category: https://www.digikey.com/short/m93rmzpw. Some products fit your voltage range such as the 36-56v IEEE802.3af to 5v 2.2A model and the 45-57v IEEE802.3at to 24v 0.875A. Many issues arise from the DC-DC converter inside switches, often due to leaking or degraded electrolytic capacitors that lose effectiveness over time. Regarding your earlier points... Microtik offers PoE-powered indoor switches; see this link: https://mikrotik.com/products/group/swit...ter&s=c&f=["poe_in","indoors"]
The gear is causing lights to flicker on a different circuit, which suggests moving the power source away from the equipment itself. This would help avoid replacing them every two years due to mains interference. I’m considering PoE-powered switches as part of a broader overhaul, aiming to reduce extra power supplies and minimize failure points. In my view, fewer connections to the mains means better protection for sensitive gear.
Everything is expected to connect to the main power supply eventually. The intermediate steps are unlikely to make much difference; probably only the PoE-powered switch will survive, while the source of PoE might fail. It would be better to consolidate all network equipment onto one or more UPS units.
This brings us back to PoE powered switches. Safeguarding a single large switch is simpler than protecting multiple switches scattered across racks. The 'core' switch should run on its own dedicated circuit, which isn't practical for rack-mounted devices due to complex constraints. This also improves future flexibility, especially if we plan to power parts of the system with solar panels and batteries later—though that will likely be several years away. Keeping all sensitive gear together reduces the need for strict separation.
This could be useful? It seems to require a POE++ input, which might be for the highest output level. Most switches don’t deliver much beyond that. It’s a bit niche. I understand it only supports 8 ports, but at least it’s something. Check out this link: https://store.ui.com/us/en/category/all-...2-5g-8-poe
It seems this capability is quite specialized, even among Ubiquiti products—details vary across documentation. I located something that looks like it covers all the bases, though it only supports 8 ports. It might fit better on a dedicated page. https://techspecs.ui.com/unifi/switching...ng-utility