We have a telecommuting employee who will be using an 802.3af-compliant IP phone at her desk, but she doesn't sit close to her router. In the past, we gave these types of employees a 802.3af POE injector and had them plug the other end into the LAN port on their laptop, and share the laptop's Wi-Fi connection. This works, but it isn't ideal because

  1. The phone only works if the computer is on, and
  2. When Windows 10 installs updates it sometimes messes up the connection and we have to reconfigure it.

I would love to use a wireless PSE like Ubiquiti's AirGateway with this injector to provide a reliable Wi-Fi connection and POE to the phone in one brick (they snap together, so it looks like one brick to the end user). I actually have a spare one of these at home that I have configured as a bridge; they're just really reliable. However, none of Ubiquiti's stuff is 802.3af-compliant, so it won't power the phone.

Has anyone else made a 802.3af-compliant PSE that can be configured as a wireless bridge?

Yes, I could use my usual 802.3af injector and connect it to a range extender that includes an Ethernet port like this one, and that's probably what I'll do if I can't find a single-brick solution. This question is just looking at single-brick solutions for aesthetic reasons: the home users don't want a lot of clutter and extra devices just to get a phone to work. So the best answer here is the one that provides POE and WiFi access to the phone with the least amount of clutter.


3 Answers 3


Since you like Ubiquiti (I love 'em) why not use their "In Wall" WiFi Access Point?

enter image description here

What I like about this solution is that it does exactly what you are looking to do all in one box:

  • Wifi Access Point
  • PoE & Data Passthrough port for a VoIP phone, camera, etc.
  • Standard Data port

The best part is, it goes into a standard wall or surface mount jack for a nice clean install.

  • It is cool, but it's just POE pass-through, not a POE injector. It would still need to be connected to a POE injector or switch.
    – browly
    Commented Oct 9, 2016 at 2:30
  • According to the documentation, this can only receive power from the UniFi switch, so it's not practical for a home user.
    – browly
    Commented Oct 10, 2016 at 22:17
  • @browly - You can use this with any POE switch. Commented Oct 10, 2016 at 22:32
  • According to the UBNT forum, the UAP-IW supports 802.3af alternative A, but not 802.3af alternative B, which is probably the reason for the footnote in the document I linked to. But you are correct that it will work with most 802.3af devices, so I retract my earlier comment.
    – browly
    Commented Oct 10, 2016 at 23:08

Powerline Adapter with PoE Injector (~$60)

Update 10/19/2017

A year later, I wholeheartedly recommend a Powerline (aka Homeplug) adapter with POE, rather than a wireless bridge. I still haven't found any wireless bridges with POE out for less than $100, but in the meantime, the handful of COPS-928-POE have been working great. I definitely recommend this option for connecting remote IP phones. This is a decent option for remote security cameras as well.

The idea behind PoE was to make it easy to send power to devices where you had Ethernet (or could easily wire Ethernet), but no power, but if you happen to have power, but no Ethernet at the place where your PoE-powered device needs to go, a POE PSE Powerline adapter is a better option than a wireless bridge. The Powerline adapter sends its signal via the existing electrical wiring in your house, and will generally encounter less interference than a wireless adapter (unless you have a lot of AC motors running, like vacuum cleaners or heavy machinery).

The TP-Link AV200 Nano has been working great as the other end of the Powerline bridge, by the router. This end of the Powerline bridge doesn't need PoE out, and the AV200 adapter is cheaper than the higher-bandwith AV500 adapters (and later). An IP phone doesn't need much bandwidth, so the ~70 Mbps supported by the AV200 is plenty.

Original Post:

After several hours of research, I'm feeling pretty confident that a wireless bridge with a built-in 802.3af PoE injector doesn't exist except for industrial applications. However, you can get a Powerline ethernet bridge with a built-in POE injector, though they can be a bit harder to find.

Side note: no, I am not getting EoP confused with PoE. There really are devices that can go from EoP to PoE in a single unit.

The lowest-clutter solution to connect the phone to the network and provide PoE is a Powerline Ethernet Bridge with PoE Injector, such as the Comtrend Powergrid 9141s-poe Powerline Network Adapter or the COPS-928-POE, available on eBay.

COP-Systems COPS-928-POE connects to a Powerline network and outputs PoE in one unit

Low clutter: the only item close to the phone is Powerline adapter. The phone connects directly to the Powerline adapter, which outputs 802.3af, so no need for a separate PoE injector. The only cable is the Ethernet cable going from the phone to the Powerline adapter. There's not even a power cord, since the device is a wall wart.

This is slightly more clutter than a wireless bridge, because you also need a Powerline adapter near the router that is compatible with the Homeplug AV standard, such as the TP-Link AV200. But at least the extra clutter is with all your other network equipment clutter, instead of cluttering your desk.

Diagram showing ISP > Cable > Modem > Ethernet cable > Powerline adapter > Outlet > Electrical Wiring > Outlet > Powerline adapter with PoE > Ethernet Cable > Phone

Easy setup: Since this solution is for a home user who will probably need to set it up himself, you want the simplest possible setup. Powerline is plug-and-play: just plug in both adapters and push the button on each one to connect them.

Better for phones anyway: Powerline has less packet loss than WiFi, which means better call quality [citation needed].

UPDATE (10/24/2016) I tested the COPS-928-POE paired with TP-LINK AV200 Nano. They established a link within seconds after plugging them in. COPS-928-POE powered up my phone right away, and my phone connected to the server a few seconds after the two Powerline adapters established a connection with each other. I hit the security button on both adapters to establish a secure link, and everything reconnected again within 15 seconds. There was no noticeable difference in call quality, compared to my Ethernet connection. Since they are now paired and ready to go, I will be shipping the pair to the home user, confident they will be able to get these set up fairly easily.


Alarm.com ADC-W110

Looks promising. Claims to be 802.3af-compliant.

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