Ethernet-over-Coax(EoC)

C

cam-da

n3wb
Nov 3, 2023
28
1
Germany
Hello,

I have the following question:

I have a 40m long RG59 coaxial cable already installed and I would like to know if it is possible to use the following connection also for two IP cameras. I would like to use these extenders.

Manufacturer's recommendation (Dahua):

www.dahuasecurity.com

LR1002-1ET/LR1002-1EC - Dahua DACH

LR1002-1ET/LR1002-1EC
www.dahuasecurity.com www.dahuasecurity.com

NVR --- (IP) --- LR1002-1ET --- (coax) --- LR1002-1EC --- (IP) --- IP camera

My idea:

NVR --- (IP) --- LR1002-1ET --- (coax) --- LR1002-1EC --- (IP) --- POE switch --- IP camera 1 / IP camera 2

Is this solution conceivable so that I don't have to lay the second cable and can operate both IP cameras or is there another better solution?

Many thanks for any information.
 
Yes it will work. I have 4 cameras on a POE switch doing just that with the coax in the middle. Mine is about 100 feet.
 
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I used to run two cameras that way with 200 ft of coax in the middle
 
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cam-da said:
Thank you for your good news. I haven't done anything with EoC yet. This saves me a lot of work now.
Click to expand...
Hello @wittaj, hello @bigredfish,

I may have made a mistake in my project.

In my case, the switch would be located on the outside (in the outdoor area), where no power supply is possible. This means that I also have to integrate this switch into the power supply.

Can I still implement this circuit if I split the PoE power supply with an RJ45 passive adapter and use this power supply for the switch so that this function is guaranteed? (Each camera approx. 10 watts + switch)

Or do I have to connect an extra power supply in the interior via the passive RJ45 adapter in front of the 1st extender so that the PoE output of the recorder is not overloaded because I want to connect two cameras and another switch to this shared power?

Can the extenders handle so much current that these three can work without problems? I can't find any information about the maximum load of the extenders in the data sheet.

I have attached a sketch.
1733865710158.png
 
Beyond my knowledge
 
Does your coax consist of the dual wiring that is typical with coax? If so you can power the POE switch with the red cable with the appropriate power supply on the other end.

1733869154437.png
 
wittaj said:
Does your coax consist of the dual wiring that is typical with coax? If so you can power the POE switch with the red cable with the appropriate power supply on the other end.

View attachment 209369
Click to expand...
Unfortunately not. The existing coaxial cable (100ft) is a normal RG-59 cable with BNC connectors (without additional cable). I don't know if any other extenders can handle this power from the connected consumers or what other solution I could use. I also don't care whether I connect IP or analog cameras. I just don't want to lay a second line because it's not easy due to the cable installation.

Another option would be to set up this circuit without PoE and work with 12V.
I could then use the passive RJ45 adapters and the two 12 V extenders to feed the 2 cameras and 1 switch outdoors via the coaxial cable.

For example, I could use this switch, it works with 12 volts.


The total consumption of all connected devices would then be approx. 30 watts.

I think it could work like this.
 
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If I'm reading the specs correctly, the LR1002-1ET /LR1002-1EC will operate from Mode A POE and pass that on to the device on the other end. Then at the other end you could use a 2-port POE powered switch (EmpireTech PFT1300 PoE Extender) to operate both cameras. You couldn't use this on an NVR' s POE port as my understanding is that they will support only a single camera.

NVR --- POE Switch --- LR1002-1ET --- (coax) --- LR1002-1EC --- PFT1300 PoE Extender --- IP camera 1 / IP camera 2

You would have to use a POE switch, not an injector, because all injectors as far as I know use POE Mode B. On paper, this should work, but due diligence would say to validate all of my spec reading and assumptions. You'd probably need a POE+ switch to power the adapters and cameras. You also need to consider the power limit specs of the LR1002-1ET /LR1002-1EC.
 
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tigerwillow1 said:
If I'm reading the specs correctly, the LR1002-1ET /LR1002-1EC will operate from Mode A POE and pass that on to the device on the other end. Then at the other end you could use a 2-port POE powered switch (EmpireTech PFT1300 PoE Extender) to operate both cameras. You couldn't use this on an NVR' s POE port as my understanding is that they will support only a single camera.

NVR --- POE Switch --- LR1002-1ET --- (coax) --- LR1002-1EC --- PFT1300 PoE Extender --- IP camera 1 / IP camera 2

You would have to use a POE switch, not an injector, because all injectors as far as I know use POE Mode B. On paper, this should work, but due diligence would say to validate all of my spec reading and assumptions. You'd probably need a POE+ switch to power the adapters and cameras. You also need to consider the power limit specs of the LR1002-1ET /LR1002-1EC.
Click to expand...
I am not familiar with the PFT1300 PoE component. I will have a look at it. My problem is still that I don't know how much current / power limit I can load the two LR1002-1ET /LR1002-1EC with. I have not found any such information in the manufacturer's (Dahua) data sheet (only the device's own consumption <2W).

Many thanks for the tip.
 
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