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Questions tagged [power-over-ethernet]

45 questions
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Two network adapters one gateway (UBUNTU)

I have a regular LAN adapter and a PoE adapter on my computer. I have an IP camera connected to the PoE port and on the regular one I am connected to my router. I can access my computer through the LAN adapter via its IP address (192.168.1.10) BUT I…
Marcelo
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PD detection by passive PSE PoE (injector)

As I understand IEEE PoE standards, the PSE detects PoE capability of the connected device (PD) by measuring resistance on certain pairs and then negotiates its PoE requirements. Questions: Do passive PoE PSE perform the measurement before…
Overnout
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MikroTik Router: PoE-In doesn't work

I'm trying to install a MikroTik Cloud Core Router CCR1009-7G-1C-1S+PC. Our internet comes from an antenna and the main cable (from the antenna) first connects to a PoE injector (Phihong POE61U-560DG). The cable which comes out of the PoE injector…
Andreas Remdt
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Axis PoE Camera works with PoE-Switch but does not using various PoE Injectors

I am trying to get a AXIS M3007-P surveillance camera to work with Power over Ethernet. Connected to a D-Link DGS-1210-10P PoE Switch the camera just works perfectly fine. However, the D-Link Switch is not available where the camera is going to be…
t0bias
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Passive PoE Router Fried Tester

Today I accidentally plugged my cheap master Ethernet test unit into my brand new router which had passive PoE enabled on the port. The tester went crazy and now skips pins. It will be cheap to replace but could this potentially hurt the router…
user2875165
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PoE from 2960 without Layer 1 Connection

I'm attempting to use a Cisco 2960-X (LPS-L) to provide power for a some Nexus 7 tablets (via a TP-LINK PoE Splitter). The issue is that without some actual device connected to the LAN port of the PoE splitter, the 2960 won't keep the port up and…
Alex Miller
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Dell PowerConnect Power Over Ethernet randomly faulting

I have a dell PowerConnect 5524P that is having an odd issue. On a fairly regular basis, I check the status of the PoE system on my switch. The PoE ports almost always list their status as Fault, and when I plug in a PoE device it will not get…
adear11
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How can i measure the power consumption of a PoE switch?

I have to measure the power consumption behavior of switches which are powered with PoE and which also provide energy to other devices. How can this be done? regards
user1291235
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Power-over-Ethernet: Designing PSD with less than 48V?

I want to use Power-over-Ethernet for an IP Camera. On the host-side, which also is the PSE (Power Sourcing Equipment) I have my own hardware. On this hardware I just have 12V of supply voltage. However, according to all the documentation about PoE,…
Toby
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Are Cisco Small Business 300 series switches compatible with pre-standard PoE detection of old Cisco IP-phones?

I have a humble Cisco SF302-08MP managed PoE switch that I'm trying to use for powering an old Cisco 7902G IP phone. This phone uses the proprietary Cisco pre-standard (i.e., non-802.3af) PoE detection method. Connecting the IP phone to the switch…
joechip
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Can the USW-Enterprise-48-PoE-EU be used in Britain?

I need to purchase a USW-Enterprise-48-PoE as our infra, is already Unifi based. needs all 48 PoE ports. is short on rack space. USW-Enterprise-48-PoE As the USW-Enterprise-48-PoE-UK is currently sold out, is there anything stopping…
James Geddes
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What could cause a PD (access point) to not detect / pull power from a PSE (switch)?

I've got a PD (Powered Device : Ubiquity AirCube ISP access point) and a PSE (Power Sourcing Equipment : TP-Link TL-SG1005P switch). My understanding is that there are two ways of supplying power : A and B. The PSE (switch) in this case supports A.…
sbrattla
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Port negotiation issues, IP Radio tower

Got a ubiquity IP radio on a tower. One side of the link negotiates 1G but the other side has issues. It will negotiate 100Mb after a reboot every now and again (very random) but mainly sits at 10Mb. I can iperf the link and saturate it on 100Mb…
patterned
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HP 3500yl-48G not giving PoE for Linksys SPA942

What can I have configured bad, when PoE on HP 3500yl-48G isn't working? The IP phone, Linksys SPA942, works at another PoE switch. Port configuration: PoE Enabled: Yes Maximum Watts: 17 Priority: low Allovation: usage LLDP Dot3 LLDP TLV:…
martin
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ASUS RT-AC66N and PoE

I have an ASUS RT-AC66N router, and I will like to power the router by using PoE. The required power input for the router is 19V DC and 1.58A. But I haven't been able to find a solution where I'm sure it will work. Are there any who know of a…
Diblo Dk
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