Split cable from nvr to outdoor camera to use as outdoor access point

[Nick1979]

Hi,

my dahua nvr has four Poe cables going outside to four cameras. Can I split one cable and use that cable to not just do a camera but also to have a Poe powered access point?

 

[tigerwillow1]

Brown and blue pairs are unused with the cameras if connected to a POE switch, and I assume the NVR built-in switch operates that way. You can buy a cable splitter/combiner pair, or build you own. I run a few camera pairs this way. I also assume you'd need to connect the access point to a separate POE switch. From what I've read about the built in POE switch, it wouldn't work for that purpose. A small possibility would be if you could run a single port in bridge mode. I don't know if that's possible or not.

 

[Nick1979]

Would you think two of these would work?

 

[steve1225]

1. there are POE combiner splitters - they use fact that Fast Ethernet with POE require only 4 wires - CAT5 cable have 8 - so You can put 2 fast ethernet connections with POE in one CAT 5 cable. This solution use 2 POE ports on switch/NVR side.. Works only with fast ethernet - AP will not have gigabit.

Amazon.com

2. there are POE extenders - 4-5 port mini switches powered by POE, which can send POE power to other ports.. You mount this switch next to camera/AP (on external wall, under/above ceiling etc).. This solution requires that Your NVR / POE switch supports POE+ power limit (30 wats per port) - to support 2 devices using POE power (15 wats) connected to this switch. This solutions supports Full gigabit.

UniFi Flex - Tech Specs

Flexible 5-port, Layer 2 PoE switch for indoor and outdoor use, that can be powered with PoE++.

techspecs.ui.com

https://www.amazon.de/Outdoor-PoE-Out-Port-Waterproof/dp/B0CJBYG37T/ref=sr_1_4_sspa

 

[Nick1979]

1. there are POE combiner splitters - they use fact that Fast Ethernet with POE require only 4 wires - CAT5 cable have 8 - so You can put 2 fast ethernet connections with POE in one CAT 5 cable. This solution use 2 POE ports on switch/NVR side.. Works only with fast ethernet - AP will not have gigabit.

Amazon.com

Ok starts me thinking I forgot my nvr does not have the Poe build in, I use separate injectors. I have now on one roof two cameras both separate with port of nvr to separate Poe injectors and then to camera outdoor. Could I use this splitter, in case of Poe injector, split one cable and use for both camera’s? In that way I could use the other cable for the access point.

 

[steve1225]

Ok starts me thinking I forgot my nvr does not have the Poe build in, I use separate injectors. I have now on one roof two cameras both separate with port of nvr to separate Poe injectors and then to camera outdoor. Could I use this splitter, in case of Poe injector, split one cable and use for both camera’s? In that way I could use the other cable for the access point.

in case of passive POE splitter You need 2 switch ports and 2 POE injectors.
in case of POE extender (mini switch) You need only one ethernet port and one POE injector (but it must be POE+ / 30 watt minimum)...

 

[Nick1979]

in case of passive POE splitter You need 2 switch ports and 2 POE injectors.
in case of POE extender (mini switch) You need only one ethernet port and one POE injector (but it must be POE+ / 30 watt minimum)...

Hmmm, than it becomes too complex I think
Thank you so much for your time and very good advice, much appreciated!

 

[tigerwillow1]

View attachment 200754Would you think two of these would work?

Those won't work. They split all 8 lines to both output ports. The example in post #5 is the type that works.

Ok starts me thinking I forgot my nvr does not have the Poe build in, I use separate injectors. I have now on one roof two cameras both separate with port of nvr to separate Poe injectors and then to camera outdoor. Could I use this splitter, in case of Poe injector, split one cable and use for both camera’s? In that way I could use the other cable for the access point.

With an injector you're likely out of luck with the simple splitter/combiner because injectors generally use a poe mode that needs all 8 wires. The poe-powered 2-port switch should work. Andy sells one EmpireTech PFT1300 PoE Extender

 

[TonyR]

Hmmm, than it becomes too complex I think ☺

Or use an outdoor-rated POE extender (POE powered POE switch) as @steve1225 linked earlier. I've used a 1in-2out version for over a year now. Just make sure of:

• Your outdoor access point is 802.3af/at POE compliant and is NOT using passive 24VDC POE power.
• The one POE injector that you'd power the above POE extender has the power budget (total wattage) to power the camera and the access point.