Power Over Ethernet Using 4 Wires (2 Pairs) 

Awesome

Thank you for the kind words

Thank you for the kind words

I would recommend @willie howe

You can connect two cameras ,but not directly in the back of the nvr. The Hik nvr does not support the 802.3af mode a standard. So you need to use a switch that does

@@cctvny You've just mentioned something that has driven me crazy, I have HIKVISION EXIR TURRENT Network Camera DS-2CD2385G1-I 4K 8MP IP POE Network camera and a HIKVISION NVR DS-7600 Series Model DS-7616NI-K2/16P how do I get to use 2 cameras on one Ethernet cable? I've seen many people wanting to know this.

The cable needs to be twisted pair to send and receive data. The power will usually work. Cat3 24 guage usually will work but you might only get 10mbps. That's usually enough for most Ip cameras. I would reccomend you test it for a few days and see if it works, before you rely on it. There are also many converters on 2 wires (1 pair) that will give you poe as well, that will work with most cable.

Best way to check is to take the camera straight to the nvr and connect it with a small patch cord the same way with the 4 wires and test both ways. With extended distance on or off. It may be extended distance just changes the mode which happens to change that setting. But test it comfortably by the nvr.

My pleasure!

Hi Kevin I think your autocorrect might have changed some of your wording on your first sentence. If you can clarify what cable it is ,cat 5,6 and if your not sure,can you tell me if they are twisted pair at least. If I did understand it you have a 2 pair cable (needs to be twisted) between 2 rooms going to rj11 phone Jack's. If it is cat5 or cat 6 yes you can convert and put rj45 Jack's. If its cat 3 and the distance is not long it can work as well, but I can not guarantee any speeds until you test it. If it is cat3 or even a not twisted cable they make converters that will give you the speeds you need. Also why would you connect 2 routers? Do you mean a switch or a wifi access point in the second room?

@@cctvny firstly thanks a lot for your reply. I was planning to connect 2 routers on two different floors but due to the primitive wiring I was not sure if I would be able to connect them. I am not aware if my wire is Cat5 or Cat3 and it has 'Blue white orange white pairs. I don't know if this helps I am really poor with terminology I am a med student😅

Limit speed to 100mbps

Hi Willie , I apologize for the late reply. For gigabit poe all cables are getting power and transporting data

1&2 are + , 3 &6 are - you can see in the video on the injector being used

@@cctvny So 1, 2 are Tx+, Rx+ and 3,6 are Tx-, Rx-. Is it correct?

It really depends on the model of nvr if it supports it. I have seen some of the hik style nvrs have an extended distance option, once enable it worked on this node. However , I can not guarantee it .

@@zoeyjune396 Thanks for the quick reply. Looks like this Nvr has extended distance option. Should I turn this on even though my distance is only 90 feet.?

It really depends if the camera supports the 802.3af Mode A to begin with. Cat3 can usually do up to 10mbps of data. Just verify its actually cat3 and its twisted. Otherwise you will get power and no data. I have seen it done many times for under 100 foot runs

Thanks so much for the fast reply! The cam is a Dahua IPC-HDW5831R-ZE and the spec sheet lists power supply as DC12V, PoE(802.3af)(Class 0). But I can't find anything about the mode. Any thoughts? Thanks again! And the cat3 is twisted.

@@bradpalmquist4163 sorry for the late reply. From speaking to my friends at dahua they said that the 802.3af standard includes both. So if you have the camera already you can bench test it to see if it officially supports it. Doing that won't hurt the camera if it does not

You can not get 1000mb which is gigabit speed over 4 wires. And not all cameras support this , and the switch or poe Extender must support this as well. I have seen tvt nvrs built in switches support this protocol but not dahua or Hik.

@@cctvny i dont want to have gibabit speeds, in the dahua camera specs it says 100/1000 so to me it means that it support both. I just tested a 10/100 camera and it works on 4 wires. If the spec of the camere says 100/1000 and not just 1000, shouldnt be compatible with 4 wires too? Can you maybe test such camera and see what happens?

If you could tell me if it's a Hikvision camera then I could get you there color code. Otherwise I cannot guarantee every manufacturers equivalent

@@cctvny , Is a Swann Camera, i was replacement (couple minutes ago) redwhite for brownwhite and blackwhite for brown. i left bluewhite and blue EMPTY... and i start getting video and audio, BUT i'm not sure it's that right?? thanks for your FAST answer Bro

@@cctvny , Now I try connecting blackwhite for BLUE, and redwhite for BLUEWHITE, the video quality work better. and the camera feel not too hot

Hi Carlos, From what you are describing to me is the camera you have is an analog technology. It does not communicate digitally the same way Ip cameras communicate. In those cameras usually a pair is for video and a pair for power. Many times in the camera cable itself there are only 3 wires since they share the negative of the camera. From what it sounds like on your camera ,is that it has hd on a pair and a separate analog video as well that when tvi first came out was for spot monitors options to work as well. As for audio I only have seen the analog cameras that are motion sensors or covert that have it built in and that also is a pair of wires, which most times at the root shared a ground as well with the camera and the power. Hope all is working out for you

It is only relevant to this video if your broadband router gets power via poe. Your question however does not involve power, and regardless will work with a 10/100 speed

@@cctvny I got a ethernet cable with 4 wires inside it For which my broadband connection speed is limited to 100 Mbps My question is Can I use a normal WiFi router that supports 8 wire ethernet cables ?

Hi @jcmarcell unfortunately it most probably will not work if it is not twisted pair. You will get power but data will not work. Your choices are to use an analog HD camera(tvi/cvi/ahd they now go up to 12mp) or to use a two wire to poe converter. If you did go the analog HD route you can get a simple four channel and use it as encoder if you have a larger ip system

@@cctvny I get you, you say it won't work, but in real world scenario are we talking that it won't work over so many feet? I think the longest run is about 70ft and the shortest being around 30ft. I understand the interference when it comes to something not being twisted pair but you don't think 30 ft can deliver 2 megabits with interference?

I will be happy if it works for you. I went down to help an installer with an install and the run he had was less than 20 feet and it did not work. But its in your house so it will be easy for you to test. Let me know the results

@@cctvny damn not even 20ft...........Honestly I'm gonna be that guy and give it a try. I'll let you know! Thanks for the video and responses.

@@cctvny hey so you were right, it did not work because it is not twisted pair. It does however transmit power (I guess we know that since the motions were active) and also worked with my ethernet cable tester. But from core switch to aggregation switch didn't do shit lol. It must be way too much data loss at 70ft(which is my rough estimate) Also if I'm understanding correctly, utilizing an analog system would be the copper coaxial cable? I was specifically interested in removing the useless motion sensors and utilizing the cable in the walls for Poe and data. Do you think I could use these for anything else? Edit: what is an encoder? Would I be able to utilize something that can convert the data to usable transmission, and then convert the data back on the other side? I've seen systems that can convert USB data over long Ethernet runs and then convert it back to USB data on the other side. I've also seen ethernet data converted over coaxial and then back to ethernet data.

If it's not twisted pair it will not send data. The twists are part of the technology that allows the communication to follow. If it is twisted pair then perhaps the run is too long.

I am not sure i understand you. But if the question is if you have a non gigabit speed network, can you use cat 5 instead of cat6 for poe 802.3af mode A. But for data mode b still works with 4 wires but you do not need cat6 since you are not going to have gigabit speeds anyway. I hope this helps. If you reply please make sure you have it explained better and that the question spies to an application that requires power on the cable

@@cctvny ok my last question ...all though I don't have a gigabit connection speed but my modem and computer have 8 pin port so in that case will I get advantage over packet loss with cat 6 cable

@@random2059 ,in this instance cat6 only benefit is if it is alot of work to run the cable and you wanted to have something for the future. For your current application if I understood everything correctly, then it would have no benefit over cat5e

Thats the beauty it uses the same cable for power and data, different types of signals. Data signals cannot interfere with the power signals since both of the signals are at the opposite ends of the electromagnetic spectrum.

@@cctvny really informative

Jason you can not. You may get power but not data. It needs to be twisted for data. I have been to a site that tried this even on a 12 foot run and it did not work. There are converters by companies like altronix and vigitron thet let you use a pair of non twisted cables for poe. If you need this for a cctv solution you can use a tvi/ahd/cvi camera for a 100 foot run of quad and then you can have an encoder or dvr and then import it into a regular nvr as an rtsp stream

Is it twisted pair cable? And are you using poe at all? And if you are using poe are you using a poe switch or injector that supports 802.3 af mode a?

Hi Jared the limitations are the same as traditional cat5 or cat 6 network poe distances so anywhere fro 250-325 feet depending on the cable

@@cctvny so I split my cat6 cable to run 2 CCTV cameras at 200 feet. But the video quality isn't very good. I used passive baluns. Each balun using 2 pairs

Jared you are confusing analog, this is for IP based systems

@@cctvny yes I understand but i wanted to know if I can do the same for analog cameras without a problem

@@jaredhussain9565 I can not give you a definite answer since this a completely different technology. I would think if it is an analog HD technology ,like tvi,cvi,ahd that having 2 modulated cameras on the same cable sleeve for distances would be more of an issue. Also if it is Analog HD they have different passive balls to support the resolutions. In addition regarding power are you measuring what you are receiving? Since the camera is 12 volts dc and pulls around 1 amp probably at night , 1 pair of cat cable is not rated to hold that voltage regardless. I would see if you can power it remotely and if your quality improves. As for ip cameras using the 802.3 af mode a 2 pairs are still being used for power at the end of the day, just data is riding over the same cables at the same time. If you see the analog cameras are giving you issues just use ip cameras instead using this technology. Or perhaps if you see more cameras may be needed running the cat5 to a poe powered switch where you can support several more cameras even

It does on most switches , but here I'm demonstrating 802.3af mode a capable devices, switches and injectors. So to recap the camera or device must support the standard as well as the switch. If you are using an nvr and for some reason one of your camera pairs got cut or damaged durring construction. You can use a poe injector that supports 802.3af mode a and plug the camera into the poe out and plug the data Into one of the camera ports of the nvr. You may have to manually set its ip adress in the nvr and the camera if it no longer finds it automatically. But it saves you from running a new line

So if my cameras power comes from brown pair - which other pins are also active?

@@leem6011 green and orange, blue pair is used for 1gb connections if the camera requires it

@@leem6011 blue

@@leem6011 if there is voltage on the brown pair then there will be voltage on the blue pair as well and data will have no voltage on orange and green pairs, which is not 802.3af mode A

Use brown instead of orange. But make sure you do the same thing on both sides. And that you have devices that both support 1236 wiring scheme for 892.3 after modea

@@abrahamlieberman4190 thanka worked great

L.c , the 4 wires work for a limited amount of devices. Also using the 4 wires is not something that you do not do to begin with. It is usually to correct a situation after the fact or to add another camera without rewiring.

@@cctvny i use brodband ...... I conocted only 4 wird after watching your video 4 wire or 8 wire any difference for brodband ? I mean downlod and uplod speed

@@l.c.ahir. for broadband if you use 4 wire your are limited to 100 mbps, if your speeds are higher you won't get it. The video i showed was for powering and data for mainly camera applications

@@cctvny tq my plan 50mbps😁😁

I've wires cable how to do that? Please help

That is only for data and not regarding poe, which also provides power for devices like up cameras or ip phones. The cheap router only has 4 wires since it is not gigabit and data only and work on older standard for the data