sundance-communications.com Forums Computer Internet Hosted PBX Voip-Asterisk POE Another way??

https://www.cablemodeminfo.com/quicktip-cabling-power-ethernet.html-ssi
Does this work?? Can you do this at the patch panel end, and do a poor man's POE??-- Running the 24 volts over the blue & brown pair to the phone. Or is this just a bad idea?

We have several wall-mounted phones that need to have power, but have no power outlet near them. We're trying to find a nice, easy solution--but perhaps there is none. An expensive POE switch is not an option at this point.

I would imagine that it would work. POE switches just send the power over those 2 pairs.

Well, that's what I was thinking too. We'll try it out first here in the shop. If it works, it will solve a big issue with an install coming up.

In fact, this seems to me to be a big issue with the IP systems all over. The AC adapters are fine for desks---but when you have wall-mounted phones---you run into a big problem. It looks real cheesy. It's like taking a step backward in technology.

Well I had to run a camera in an area that had several unused cat 5e cables running to it. I used one cable for the video and another cable for power. I took the pairs and twisted them together and attached the power connectors.

But POE switches are coming down in price so much it almost makes sense to just get them....even if the other way does work, seems like it could cause more headaches in the long run, besides, if you only need a few ports for wall mounts and such and AC adaptors are OK for the rest you can get a 8 port POE switch for real cheap.

Steve

Netgear Prosafe FS108p and FS116p are small port density PoE Switches. They have 4 and 8 ports respectively of PoE capability and are pretty damn flawless unmanaged switches. I use them a lot in very small workgroup situations.

If you accept the fact that using that method you mentioned above means you have a live-wire then I see nothing wrong with it. That method is what valcom recommends on their powered PA Horns (minus the terminated connectors).

If you are pretty enough with your splicing and have lots of electrical tape you can make a fairly clean looking install.

For safety's sake I would clip the power pairs from running to the modular plug.

Have u considered a POE injector?

You're right!! I had done several googles of POE stuff, and all that came up were very expensive Cisco switches. I just thought that even the less expensive ones were like one-half---and THAT was even too much.

I then checked with our resident IT guys, and they showed me some decent switches for some decent prices.

We did look at some injectors and for just 4 or 5 phones they are a good deal---but the prices for a 24 port switch was pretty decent, so....

So we will be replacing the current switches with 24 port POE switches if we can. The dollar figure doesn't seem to be that huge. Thanks to all for the in-put.

Beware,,, not POE devices are created equal. If the manufacturer says 802.3af then the voltage is supposed to be 48vdc. I recently bought some power injectors at www.winncom.com and installed them on some access points. Price was very reasonable.

I have had to do this in the past,and it worked using the transformers that come with the equipment.