PoE Texas 8 Port PoE Injector - 8 Port PoE Adapter - Add Power Over Ethernet for Passive Devices - 10/100 Data Rate for PTZ, IP Camera Video Security System, VoIP Phone, WiFi Access Point (POE-8-ENC)

The vendor sells other versions if you want a "system" that includes power supply and the injector. This is just the injector, no power supply. This is for those who have custom power requirements. I recommend that you do not order this if you haven't read up on POE and don't understand how to use it. I have found that almost all POE kits that include power supplies, whether passive injectors like this or POE network switches, do not provide enough power to fully populate all ports at full 802.3af at 15.4 watts per port, let alone 802.3at at 25.5 watts per port. This is fine for most systems where average power per port is less than maximum but if you have long-distance IR illuminators that take more power you'll find your cameras dropping out intermittently or even premature power supply failure. To fully power 8 ports of 802.3at you need a 204 watt power supply; 8 ports of 802.3af requires 124 watts. If you look at 8-port POE injectors or switches, almost none have power supplies that can fully support the standard. This is a topic for which Wikipedia is your friend. There's a great article there. For 48v, figure just at a half amp of power supply current per 802.3at port at full power, or 4 amps for one of these injectors. To prevent premature failure, I recommend using a power supply rated for 1 amp per port, or 8 amps for this injector, so that you're operating at 50% capacity over time, extending the life of the power supply. If you need more power than the kits have, then this no-power-supply version is great. Why buy a kit with a power supply that won't work for you? If you don't need full power then why include more-expensive power supplies in the kits? The seller of this item has plenty of kits that offer a great balance of power versus cost for most people. No, I don't have any affiliation with them. Other than them responding to a technical question I posted here on Amazon once, I've never had any contact with them. But when your needs are outside of the 80%, I'm thankful to them for selling this injector that I can customize myself. I purchased a 48v power supply from Amazon: Genssi 48V DC 7.3A 350W Regulated Switching Power Supply and mounted it in a metal box I purchased elsewhere (the only suitably-sized, inexpensive, box I could find was a box made for a DSC 1832 alarm panel; just search). The power supply I ordered did not come with mounting brackets. I can't find the link where I ordered the brackets for a lot less than this link but here's a link where you can order the mounting brackets to fit Mean Well power supplies: Mounting Brackets for Mean Well Power Supplies . For better prices - much better prices - on the brackets, search for MHS014 and look for Mean Well (or Meanwell) in the results. Put this all together and you have a super reliable POE system that can fully power all ports.

The PoE Texas 8-Port PoE Injector was exactly what I needed to add PoE support without replacing my existing 48-port switch. I used it to power a Polycom Pano wireless presentation unit, which requires 48V, along with four Lorex IP cameras — and it handled the load without issue. Setup was simple, and the injector delivered stable power and data to all connected devices. For anyone running a larger non-PoE switch, this is a smart and affordable way to add PoE functionality where needed without a full network overhaul. Bottom line: If you're looking to power multiple PoE devices without replacing your main switch, this injector is a reliable and budget-friendly solution.

This is a straightforward product, made well enough for its intended purpose. All it does is connect the 4 wires in a CAT 5 cable that are not used in a 10/100 Mb/s setup to the positive and negative supplied by the power supply (wires 4, 5 are positive and 7, 8 are negative or ground) which is not included. This is what powers the end devices on the POE ports of the device. Each POE port is also connected to its corresponding LAN port via only the the 4 wires that carry data (1,2,3,6). This device is not a switch, nor is it a hub. The LAN ports are not connected to each other. It is designed to be used in addition to a switch/router. The voltage you put in is the voltage you get coming out of the POE ports. Voltage x Current = Watts. Since you should know the WATTS that your end device needs, and you control which power supply you will use, just use this equation to figure out if you will exceed the max current per port. All of the POE ports will have the same voltage available to them. You could just connect wires 4,5,7 and 8 directly to the power supply yourself, which is what I had originally done, but this product keeps everything neat looking and tidy. Connecting wires for more than 1 or 2 devicesfor POE ends up looking like a rat's nest really fast. For the price, this device is well worth keeping things neat. I am using two of these POE injectors in very remote locations for almost 11 months of 24/7 use, and so far have had no problems. I connect the DC part of these devices directly to a battery bank. The POEs power Ubiquiti Rocket M5s with 18v and Ubiquiti Bullets at a different location with 12 volts. The only thing that I would like to see is a grounding lug. I use shielded cabling, and it would be nice if the shielded RJ45 jacks were connected to a grounding lug, for obvious reasons. Other than that, a great yet simple product, that does exactly what it claims. Hope this helps potential buyers decide if it will suit their needs. Kind regards.

It isn't listed anywhere on this page, but this unit doesn't include a power supply which completely offsets any savings and leads to a terrible unboxing experience.

When I hook my cameras directly to a separate power supply and ethernet cable, they work fine. When I connect this Injector to the same power supply, there is NO power coming out of the PoE port. Thus my cameras don't work! Very disappointed since I am past my return date. UPDATE: Since posting a 1 start review, the company reached out to me and offered me a full refund even though I was past the return date (it took some time to get my cameras installed due to some medical issues). So even though this product didn't work for me, their customer service was EXCELLENT. I have since bought an injector from another company that works fine with my cameras. I don't know why this didn't work... I hope they can provide more details to customers in the future.

I had a few all-in-one PoE switches die on me, so I prefer to use a regular, high quality switch hooked up with a bunch of patch cables to this. Zero problems so far, and it means I can select a switch by its features without regard to whether it supports PoE and is priced within the range of mere mortals.

Einfach und sehr Günstig um aus einem "normalen" Ethernetanschluß einen PoE Anschluß zu machen. Einzig das Fehlende Netzteil, was aber deutlich beschrieben ist und die sehr Dürftige Dokumentation (gerade zur dimensionierung des Netzteils) trüben das sehr positive Gesamtbild etwas. Trotzdem volle Sterne.

viene sin alimentador

Attenzone che è un pò delicato. Poco protetto, in plastica. Fa il suo dovere ma va installato in ambiente protetto

Great simple product but be aware does not come with a power supply.

Be aware, you'll need to buy the adapter separately. It's great though.