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Questions tagged [power-over-ethernet]

45 questions
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PoE switch to PoE injector didn't fry the gear

Bit of an electrical dolt, but replaced an existing wireless radio with a new radio that was powered via PoE from the switch. Using same Cat5 cable, into the same PoE port on the switch, we couldn't power up the new radio. Fearing that we'd fry…
gravyface
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Can a 24V 1Gbps Ethernet port start operating in 100Mbps mode if it was exposed to 48V PoE?

I have heard that a situation where a 24V Gbit Ethernet port was not completely fried after being exposed to 48V current, but downgraded to fast Ethernet - 100Mbps. Question: I that possible and how?
Mindaugas Bernatavičius
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Plugging a POE Injector into a POE Switch

I have had this situation happen a few times where I found a device that was being supplied POE from an injector and that injector was plugged into a switch that is already providing POE. Obviously I remove the injector and it's done. I have been…
Cesar Bielich
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Data throughput on gigabit POE PD link?

I am thinking about installing a POE switch in my gigabit network. I only need the switch to draw power from the network (PD link) but not supply it to other devices (so no PSE links). What impact does drawing power over the PD port have on data…
Stephen Winnall
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PoE powered WiFi access point?

A few years ago, we made use of Apple Airport Extreme base stations mounted on the wall to provide a WiFi bridge to our LAN. This particular model makes use of 802.11af (Power-over-Ethernet, or PoE for short) to power the base stations. This worked…
Dennis Wurster
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Is it safe to use PoE injector for routers that do not support PoE

We bought an Asus router n66U to be installed in a tourist bus along with a server. The bus has a inverter to supply a 220V AC. However, there can be abrupt power fluctuations specially during ignition start. We need to ensure that our server and…
Kartik
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POE and AC power

Could there be any issues having both POE and AC power attached to a WAP? I'm curious because I found a few WAPs that had both...wondering if I should pull AC or just let it ride?
TryTryAgain
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PoE switch to power Cisco Aironet 1200 access points

I have a draytek P2260 poe switch which can provide up to 15.4 watt of power to devices like IP phones. This switch is a 24-ports 802.3af PoE PSE However Cisco Aironet AP require 18.5 watts and at the moment they are powered through an…
Ravi
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Power-over-Ethernet: 100 Mbps Device compatible with 1 Gbps Source?

I have an IP Camera, which is supports Power-over-Ethernet. The relating Ethernet Switch on the camera supports 100Mbs. Now when I want to support the camera with Power over Ethernet, will it be compatible with an 1Gbps switch?
Toby
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Can I use 802.3at PoE clients in a 802.3af PoE switch?

I am about to buy and install a 802.3af PoE switch (probably a NETGEAR ProSafe FS728TP) that will power some Arduinos with PoE ethernet shields that is also 802.3af. How future safe is this? Let's say that I in the future would like to install some…
Johan
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Can a POE switch power devices if a non-POE hub or switch sits between the source and device?

I want to buy a single POE source and distribute it with cheap network hubs that do not have POE. Will this work?
chrism2671
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Is it possible to change the voltage on a single port on an HP ProCurve 2910al POE switch and how?

I have a couple of HP ProCurve 2910al POE+ switches at my company that we are primarily using to power our VOIP phones that run on 48V DC. However, I have one wireless access point that I need to run off of POE, but it has to be 24V DC. I'm afraid…
goodman
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Google Fiber WAN PoE passthrough two ports of managed switch?

I have a network configuration I would like to make happen, but I'm at a loss at what to call this odd setup, which makes searching quite difficult. I want to substitute the Google Fiber Networking Box (a rather useless "router" for power users)…
Jacob Jewett
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Can Ubiquiti UniFi PoE switch be used as unmanaged switch before adopting?

I know some managed switches can just be used as an unmanaged switch out of the box, but I have a site with a UniFi US-16-150W PoE switch which nobody knows anything about how it is/was setup or passwords/controller information. My question is: Does…
codlord
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Can you damage a POE camera by plugging it quickly into a PoE switch over and over

Here is the context as I am a newbie at this - I got a free HP procurve 24 port POE switch from a nearby university. I have 12 cameras and long story short only 4 of the ports worked and the unit flashes stating their is a POE fault. I tested the…
Austin
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