Powering Two IP Cameras with One Twisted Pair POE Cable: Is it Feasible?

Hello
Is it possible to power 2 cameras on 1 twisted pair (4 pairs of cables) 2 IP cameras powered by POE
Well, I only have 1 cable (twisted pair 8x0.5) powered by POE and I would like to connect 2 IP cameras. 1 of them is POE - is it possible? I can't give another POE switch because it would have to be outside and the temperature of the switch is from 0 to +40 and as we know it is sometimes freezing cold. I don't have a second cable to let go because the apartment is finished and I don't want to break the walls. What is the split of wires from the POE switch socket? which are supply and which are transmission? - maybe it would be possible to split 1 twisted pair and connect only 1 video transmission to 1 camera and video transmission and POE supply to the other?
Does anyone know about this?

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Also read:
Everything about powering devices in the network or POE - also from the practical side
Which means that the camera can be powered by POE / 12V
IP camera signal and power supply
Connecting a camera without POE, powered from 12V to a switch / recorder with POE


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SWITCH TP-LINK TL-SF1008P mounted in cans outside. They have been operating for a couple of years and nothing happens.

Probably the only solution. Sometimes there is no other choice.

Of course, you can power 2 cameras (2 lenses in 1 housing is defakto 2 cameras) condition is the appropriate camera np Mobotix M12,15,16 and if you want to look in different directions then you have to give a series D camera.

I suspect that the friend is looking for something like this:
http://www.veracityglobal.com/products/ethernet-and-poe-devices/outreach-quad.aspx
or
http://camsat.com.pl/cctv-1/dla-kamer-ip/x-camswitch

certainly not, I do not want the switch

The author is afraid that the winter will not survive after all, this Camsat is to work outside, probably even in Poland, designers designed Polish winter saw ...

Or maybe something like: http://www1.dahuasecurity.com/en/products/pft1300-8971.html " target="_blank" rel="nofollow noopener ugc" class="postlink inline" title="" > http://www1.dahuasecurity.com/en/products/pft1300-8971.html . Available in Poland without a problem.

Gentlemen, 4 wires are enough to power and work the IP camera. This escapes the specification of the 802.3af standard.
electrode
elektronikab2b

Your friend, "bcs xpoe4 / ext", will solve your problem.

luk9753 wrote:

Your friend, "bcs xpoe4 / ext", will solve your problem.

Remember only that you do not override the power consumption . In general, most of the cameras in Poland download about 6W.

The author does not want a switch and does not have to use it .. I repeat, probably enough to earn 2 r. 45
RJ45 No. 1
1 b.orange
2 orange
3 b. Green
6 green
RJ45 No. 2
1b.niebieski
2 blue
3 b. Brown
6 brown
On the 2 sides, exactly the same.

Okay, but what will you do if the cameras only support PoE on non-data wires? (data goes to 1236, and power to 4578 - most cameras have it). The extractor's working temperature I proposed was -30 to 65, so the cold as well as a decent sun will survive (you only have to close it in some hermetic can).

For sure, dahua will work four times. The connection is made as if by a half-duplex, following a friend of NIEPOTRAFIE
A camera that does not work in this way is eg: AVIGILON.

If the camera and switch are compliant with the 802.3af standard, you can easily connect 2 cameras on one twisted pair, 2 pairs per camera are enough, just make RJ. I was forced to do this several times and everything works.

The Chinese have invented something like this - 2 RJ45 Splitter commbiner 2Poe

To buy from us for similar money. This even works amazingly well.

https://sklep.delta.poznan.pl/?page=shop/flypage&product_id=12571&category_id=1047

monsarrat wrote:

The Chinese have invented something like this - 2 RJ45 Splitter commbiner 2Poe

The Chinese invented this first and foremost how to make a wall out of a client. Your colleague may as well tighten two RJs on both sides of the cable. One e.g. on orange and green steam, and the other e.g. on blue and brown
There is one condition. The switch must supply power to the signal pairs. And this is not always the case

I would like to hook up on the topic.
I connected 2 ip dahua cameras on one UTP cable from the @potpot entry using pin 1236 and there is a very strange situation.
Cameras work, however, only when it connects one of them to the PoE switch, when it connects both works the way it was connected first.
What could be the reason?

I understand that each on different pairs?
Is this also the case on the short cable?

suworow wrote:

I understand that each on different pairs?
Is this also the case on the short cable?

There are two RJ45 terminals on both sides and each one uses 1236 pins connected to two PoE ports in the switch
I did not check briefly, I will check and let you know if this is the case.
Only a small problem appeared, I did the rest of the recorder and now I get information about the wrong login or password of the camera - the one I remembered does not work.

Reset the camera to factory defaults, instead of carving the ATTE switch (not much bigger than a matchbox).

sosarek wrote:

Reset the camera to factory defaults, instead of carving the ATTE switch (not much bigger than a matchbox).

Thank you for the hint in the ATTE case, I'm just wondering what could be the reason that each works separately and connected together they don't want to, only one of them works and if the ATTE switch works correctly.

How you mount the switch will work, here the problem probably lies on the data lines.

sosarek wrote:

How you mount the switch will work, here the problem probably lies on the data lines.

You could explain what is caused, bad pin connections, cable noise or something else is very interesting.
Thank you in advance for your help and response in this topic

Most likely, the receiver itself has a problem with distinguishing two signals released in parallel, as in the case of e.g. USB - make a cable by connecting the pins in the plug in parallel - one or the other device will work only - that's why we use switches.

arkadiuszj1987 wrote:

sosarek wrote:

Reset the camera to factory defaults, instead of carving the ATTE switch (not much bigger than a matchbox).

Thank you for the hint in the ATTE case, I'm just wondering what could be the reason that each works separately and connected together they don't want to, only one of them works and if the ATTE switch works correctly.

Hi, can you provide the model of this ATTE switch you are writing about?
I use https://atte.pl/xPoE-4-11-HS, but it is not "slightly larger than a matchbox" and has 4 ports.

I use these https://atte.pl/xPoE-3-10 - they fit in most camera mounting boxes.

Petard!!! solves a few problems for me. Thanks, I haven't had time to get acquainted with the news recently ... :(

I understand well ATTE xPoE-3-10 can only be powered from passive PoE (i.e. brownish white and brown are a minus and white, blue and blue are plus 48VDC ), ATTE xPoE-3-11 from each switch, how much power will be spent on the port in the switch?

What do you use to power the xPoE-3-10? As a standard, I use it for buffer systems https://atte.pl/IPUPS-8-20-R5U0 because I do most of it in a rack and with battery backup.

mirekq wrote:

Petard!!! solves some problems for me. Thanks, I haven't had time to read the latest news ...

There is some time on the market
To be honest I power them with a POE switch which I have on objects and I did not wonder if passive or active PoE I fasten it, it works and that's it

From what I read, ATTE xPoE-3-10 will not start with 802.3af / at and you have to use ATTE xPoE-3-11 because it has an identification system.
Maybe you just had 3-11? Check by the way and let me know I will be grateful.