POE powered and passthrough gigabit switch / splitter

P

ptr727

n3wb
Dec 9, 2015
18
1
Hi, I would like to connect a second device, but I only have one CAT6 cable.
I'm looking for a small (to fit in junction box) 1 port in 2 port out / 3 port switch that is powered by POE and will pass POE to the output ports and is gigabit speed.

I've seen a couple 100Mb devices, but not gigabit devices.
Any suggestions?
 
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Funny thing. I was just registering to ask the exact same question!
Do we really need gigabit for this?
So far the best I have found is the Netgear Prosafe Plus GS105PE. Depends on how big your junction box is though..
 
There is a problem with this scenario. Do you know the power draw of the devices on the "out" side of this switch? Also, do you know the max wattage per port on the switch feeding this smaller switch? Unless they are class 1 devices it would almost certainly not work reliably because the switch itself is going to be at least class 2.

For those that do not know the classes of POE, here is a chart:

Class 0 (undefined) max 15.4W
Class 1 max 4W, max 3.84W at device
Class 2 max 7W, 6.49W at device
Class 3 max 15.4W, 12.95W at device
Class 4 max 15.4W, reserved (not for device use)
 
Fair enough, how big is the junction box in question?
 
I use a 30W injector and two devices are 7W, leaving room for switch power.
Junction box is small, cavity in wall is big, but the smaller the switch the better.
 
not really any smaller than the packedge i linked to...

5.31 x 3.03 x 1.06"
vs
4.7 x 3.2 x 1.4"
 
pozzello said:
not really any smaller than the packedge i linked to...

5.31 x 3.03 x 1.06"
vs
4.7 x 3.2 x 1.4"
Click to expand...

True, but the CyberData one is readily available, even on Amazon, other than the eBay link, I did not find a retailer for the Pakedge model?
 
nevermind. while powered by poe, the packedge i linked to doesn't seem to pass it thru. my bad...
 
Though not ideal, remember that in a pinch you can actually connect to poe cameras with a single ethernet cable if using a poe switch/injector that uses Mode A. Only 4 wires are used per device.
 
Would this work with hikvision NVR poe? I have one location where i want to add second camera but there is only one ethernet cable. not easy to run second. Would a cyberdata splitter work while being connect to nvr's poe port to power 2 cameras?
 
ipcamal said:
Would this work with hikvision NVR poe? I have one location where i want to add second camera but there is only one ethernet cable. not easy to run second. Would a cyberdata splitter work while being connect to nvr's poe port to power 2 cameras?
Click to expand...

I would not recommend that, since the power budget for the NVR is typically much lower than an equivalent dedicated switch. You could do it with an injector at the NVR, but I would not push it with the POE being provided from the NVR.
 
SSNapier said:
I would not recommend that, since the power budget for the NVR is typically much lower than an equivalent dedicated switch. You could do it with an injector at the NVR, but I would not push it with the POE being provided from the NVR.
Click to expand...

I'll have to get the specs of the nvr output. This would definitely solve my problem.
 
SSNapier said:
I would not recommend that, since the power budget for the NVR is typically much lower than an equivalent dedicated switch. You could do it with an injector at the NVR, but I would not push it with the POE being provided from the NVR.
Click to expand...

question - How would injector at the nvr work? which injector should I get?
 
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