Two cameras over one cable
- Thread starter tuil
- Start date
I’ve done temporary fixes to carry 2 separate Ethernet ports over 1 cat5e cable and that works never with poe. What do you mean by mode A?
As long as poe uses pairs 1,2 and 3,6 and the connectors are wired correctly it should work. Maybe the poe protocol checks for the other pairs before enabling power.
David
@tuil. following on from my earlier post. this will only work for 10/100Mbps. Gigabit ethernet uses all 4 pairs.
For poe mode A I still think this should work but is non standard so you may get problems with the pre poe power on checks especially the resistance check phase and power negotiation.
David
For poe mode A I still think this should work but is non standard so you may get problems with the pre poe power on checks especially the resistance check phase and power negotiation.
David
- Messages
- 4,062
- Points
- 113
@tuil - just buy a PoE splitter/combiner. they're under £20. I've used them several times without issue. They have an A/B switch for the mode so that you can select which pairs the power is on to match the system. The one I use is the Haydon HAY-POE-MULTI which consists of two units, one at the source (NVR or PoE switch) and one at the camera(s)
- Messages
- 4,062
- Points
- 113
Yeah they're good, I've used them a few times. I'd always home run all cables at the time of installation but I've had a couple of occasions where a customer wanted an additional camera later on, right next to an existing position. Rather than repeat an awkward cable route that was a half days work, these were the answer.
27901591
Member
- Messages
- 21
- Points
- 3
Just posting this as a reference for anyone stuck with the same question, Use-IP have a FAQ on this
www.use-ip.co.uk
Installer at: IseeU CCTV
Mobile: 07903322632
Web: www.iseeucctv.co.uk
Email: Info@iseeucctv.co.uk
FAQ - Can I connect two IP cameras to my IP CCTV system using one ethernet cable?
As IP cameras become more affordable, it's becoming common for people to expand their IP CCTV while minimising additional installation costs or efforts. However, the key challenge has always been setting up a new Cat5/6 cable to connect the camera to the rest of the system. In scenarios where...
www.use-ip.co.uk
Installer at: IseeU CCTV
Mobile: 07903322632
Web: www.iseeucctv.co.uk
Email: Info@iseeucctv.co.uk
- Thread starter
- #8
@JB1970, thanks for suggestion. Those are very reasonable priced compared to Vi00103RX.
It is a shame that NVRs don't allow doing it without using multiplexers. As shown in the video, the switch managed to do that without multiplexers. I wonder if it is a hardware limitation or software issue. Maybe it could be fixed with firmware update?
It is a shame that NVRs don't allow doing it without using multiplexers. As shown in the video, the switch managed to do that without multiplexers. I wonder if it is a hardware limitation or software issue. Maybe it could be fixed with firmware update?
- Messages
- 4,062
- Points
- 113
I would doubt they'd bother. Stripping a CAT cable like that to split the pairs between plugs is just bad practice (insulated conductors exposed without sheath) Also, as the grip isn't clamped on the outer sheath, the conductors are going to be subject to strain. I seem to remember that the NVR uses mode B (though I'd have to stick my tester on a patch cord to be sure)
