Discussion
Doubt it would work. You would need an active device which would act as a mini network switch, routing data via the single cable. That would need power at the camera end which it's unlikely that you'll have.
If you wanted to get two cameras at that location via one cable you could use a pair of analogue cameras. The CAT5 cable will have 8 cores inside which you would split into 2 x 2 cores for power for each camera and 2 x 2 cores for video using video baluns. You would need to use a pair of analogue to IP encoders at the recorder end. You would also need a seperate 12vdc supply at the recorder end to power the analogue cameras.
The recorder would need to capable of receiving IP cameras via the network and not just the RJ45 camera ports on the back of the machine. Also not be some sort of closed protocol like older IP machines where the recorder will only work with cameras of the same manufacturer. Uncommon but not unheard of.
A bit of a minefield and a bit more involved than I briefly covered above but it is possible.
I would, if at all possible, just run another CAT5 cable in to save the bother.
If you wanted to get two cameras at that location via one cable you could use a pair of analogue cameras. The CAT5 cable will have 8 cores inside which you would split into 2 x 2 cores for power for each camera and 2 x 2 cores for video using video baluns. You would need to use a pair of analogue to IP encoders at the recorder end. You would also need a seperate 12vdc supply at the recorder end to power the analogue cameras.
The recorder would need to capable of receiving IP cameras via the network and not just the RJ45 camera ports on the back of the machine. Also not be some sort of closed protocol like older IP machines where the recorder will only work with cameras of the same manufacturer. Uncommon but not unheard of.
A bit of a minefield and a bit more involved than I briefly covered above but it is possible.
I would, if at all possible, just run another CAT5 cable in to save the bother.
Edited by dci on Tuesday 23 June 06:12
The splitters would work if it wasn't POE - they work in pairs, one at each end to combine two devices into one cable by each one using 4 of the 8 cores, then split them at the router. I don't think that'll work with POE (is 4 cores enough for combined power and data?) but I'm not sure - even if it would work in theory you're putting power through devices not designed to handle it.
Amazon has some POE splitters like this - https://www.amazon.co.uk/LINOVISION-Industrial-Ext... - but I can't get my head around how that would work.
Amazon has some POE splitters like this - https://www.amazon.co.uk/LINOVISION-Industrial-Ext... - but I can't get my head around how that would work.
You can do 2 x fast Ethernet (100Mbps) links and POE to two devices over one cable with splitters.
I just did exactly this when wanting to put a second camera at a roof location where it would have been ballache to rod a second cable.
It’s not possible with 1Gbps connections as that requires all four twisted pairs, but for CCTV 100Mbps is normally far greater than the cameras highest bit rate anyway.
Not all POE standards will work as some require all four pairs. 802.3at/af should both work. I’m using simple 802.3af (up to 12.9W) and that works fine.
The exact part I bought is
https://www.amazon.co.uk/dp/B08N4S8HNM?ref=ppx_pop...
I just did exactly this when wanting to put a second camera at a roof location where it would have been ballache to rod a second cable.
It’s not possible with 1Gbps connections as that requires all four twisted pairs, but for CCTV 100Mbps is normally far greater than the cameras highest bit rate anyway.
Not all POE standards will work as some require all four pairs. 802.3at/af should both work. I’m using simple 802.3af (up to 12.9W) and that works fine.
The exact part I bought is
https://www.amazon.co.uk/dp/B08N4S8HNM?ref=ppx_pop...
Sheepshanks said:
The splitters would work if it wasn't POE - they work in pairs, one at each end to combine two devices into one cable by each one using 4 of the 8 cores, then split them at the router. I don't think that'll work with POE (is 4 cores enough for combined power and data?) but I'm not sure - even if it would work in theory you're putting power through devices not designed to handle it.
Amazon has some POE splitters like this - https://www.amazon.co.uk/LINOVISION-Industrial-Ext... - but I can't get my head around how that would work.
PoE mode A works on the same pair as the data connection.Amazon has some POE splitters like this - https://www.amazon.co.uk/LINOVISION-Industrial-Ext... - but I can't get my head around how that would work.
The way ethernet works, the pairs are isolated by magnetics, so you can apply a DC bias voltage to one pair without affecting the equipment. Voila, power.
donkmeister said:
Poe powered mini switch with Poe pass through.
You'll need to ensure that the POE switch at your house end has enough oomph. If you are plugging this straight into a CCTV box I doubt it will.
This is the right answer.You'll need to ensure that the POE switch at your house end has enough oomph. If you are plugging this straight into a CCTV box I doubt it will.
Ubiquiti do small switches that do this. Eg https://uk.store.ui.com/uk/en/category/switching-u...
But as noted, you need to check what your PoE switch in the house can cover per port.
Murph7355 said:
donkmeister said:
Poe powered mini switch with Poe pass through.
You'll need to ensure that the POE switch at your house end has enough oomph. If you are plugging this straight into a CCTV box I doubt it will.
This is the right answer.You'll need to ensure that the POE switch at your house end has enough oomph. If you are plugging this straight into a CCTV box I doubt it will.
Ubiquiti do small switches that do this. Eg https://uk.store.ui.com/uk/en/category/switching-u...
But as noted, you need to check what your PoE switch in the house can cover per port.
Sheepshanks said:
Has that switch got POE pass through, or is just a switch that is (optionally) capable of being powered by PoE?
Looks to be a PoE powered switch only. I suspect the OP has an NVR setup only which will likely supply only enough power for each camera. Installing an intermediate device may not work at all given the camera input ports are for that purpose only and are not general purpose network ports.
Cheaper systems will be 802.3af at most which is 15.4w. That won't power two cameras (especially if they have IR and heaters) and a pass through PoE switch.
We need more info from the OP but I suspect the easiest answer is to run in another cat5 and be done with it.
A lot of these solutions won't be plug and play and will need supporting network equipment which the OPs system may not be compatible with anyway.
dci said:
Looks to be a PoE powered switch only.
I suspect the OP has an NVR setup only which will likely supply only enough power for each camera. Installing an intermediate device may not work at all given the camera input ports are for that purpose only and are not general purpose network ports.
Cheaper systems will be 802.3af at most which is 15.4w. That won't power two cameras (especially if they have IR and heaters) and a pass through PoE switch.
We need more info from the OP but I suspect the easiest answer is to run in another cat5 and be done with it.
A lot of these solutions won't be plug and play and will need supporting network equipment which the OPs system may not be compatible with anyway.
You can almost certainly make it work with two PoE managed switches.I suspect the OP has an NVR setup only which will likely supply only enough power for each camera. Installing an intermediate device may not work at all given the camera input ports are for that purpose only and are not general purpose network ports.
Cheaper systems will be 802.3af at most which is 15.4w. That won't power two cameras (especially if they have IR and heaters) and a pass through PoE switch.
We need more info from the OP but I suspect the easiest answer is to run in another cat5 and be done with it.
A lot of these solutions won't be plug and play and will need supporting network equipment which the OPs system may not be compatible with anyway.
dba7108 said:
Thanks for above replies. The NVR is hikvvsion with Poe built in.
Looking at it it sounds like those can work with switches, although might need some manual configuration.That said, if you need to use the one cable, then the physical splitters might be fine to plug straight into the NVR, so long as it's using Mode A.
Solocle said:
How does that work cost wise vs a days worth of labour from a spark to install another CAT5? Must be at least £250 for the two switches plus any equipment at the camera end. Unless the schematic infers that a switch be installed at both ends which would require mains power at both ends. Is that configurable by the layman? Or would the OP need to be switched on to networking and IT?
Unless its cost prohibitive and theres 40m of pristine lawn to dig up to install a new duct or something then the answer is almost always install a new cable.
Layers of network equipment also adds complexity and unrealiability. Last thing the OP needs is for a car to be stolen or something and then find that cameras haven't recording for 3 weeks because a network switch needed rebooting.
Domestic systems tend to be fit and forget and need to work consistenty without having to tend to network issues frequently.
That said, I have a wirless link in my home to connect the NVR in the attic to the router in the living room and thats been near enough flawless for the 6m since its been installed.
Aside from the poe issue, splitters like that make devices run at half duplex which you don't want, can only send or receive, not both at once.
Long term the best thing to do is run another cable (or a few cables for futureproofing), could be a pain for you of course. It's not too hard to terminate into sockets if you don't mind buying the tool and tester for £25 or so. Putting cable connectors on is way more fiddly.
Long term the best thing to do is run another cable (or a few cables for futureproofing), could be a pain for you of course. It's not too hard to terminate into sockets if you don't mind buying the tool and tester for £25 or so. Putting cable connectors on is way more fiddly.
Mr Pointy said:
What's wrong with the Amazon Linovision device linked to above? It seems to do exactly what the OP wants:
Oh yeah that would work as long as the feeding switch port is at least 30w and the cameras are less than 15w each. Would need a waterproof box near the cameras if living outdoors, but could be less faff than running a new cable. Not bad for £22, good find.theboss said:
Or the OP could just buy the sub £5 splitter pair I referenced above, get 3 patch cables and a camera and see if it works or not.... if it's Fast Ethernet and POE 802.3at or .af compliant it almost certainly will... the OP's original splitter premise was sound.
The passive device referenced by the OP will only work one channel at a time and cannot support two channels concurrently. If the OP were to use that then only one camera would work. Other solutions rely and there being supporting network equipment and/or mains power at both ends.
The OP likely has a basic Hik NVR only with cameras connected directly to the camera input ports. If the NVR has the function then a supporting network switch could be installed and the active extension equipment proposed by many routed via that switch.
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