PoE Network Switch

ste-sim2x9 · 21 Feb 2018 at 18:43

Hey guys i've got a quick question. I'm after a network switch to power 4 PoE IP cameras, do all switches support this. I've been looking at the switches for sale on Overclockers but nothing about PoE is mentioned in the sale descriptions.

Duke · 21 Feb 2018 at 19:10

It will specifically state it in the description or spec sheet. You can get PoE injectors which is another way of doing it if you already had a decent switch.

brendy · 21 Feb 2018 at 19:11

Yea any Poe switches will specifically state this. I have a 24 port for sale in classifieds if it wasn't overkill.

ste-sim2x9 · 21 Feb 2018 at 19:28

Cheers Guys

bledd · 21 Feb 2018 at 20:02

NETGEAR GS308P-100UKS

8 port gigabit Poe (4 ports are Poe)

APM · 22 Feb 2018 at 18:43

Check the ratings too,I had a camera that needed 0.75mV or 1.0 mV and the first PoE device I bought was only rated at 0.5 mV.

neodude · 23 Feb 2018 at 13:53

APM said:
Check the ratings too,I had a camera that needed 0.75mV or 1.0 mV and the first PoE device I bought was only rated at 0.5 mV.

That doesn't really make sense. 1mV, as in 1 millivolt? Is that even a thing?, lol

Jamauk · 24 Feb 2018 at 08:56

If it's any help, I've got three D-Link 8 port PoE switches (4 PoE ports) and they've been faultless, one at another property so it needs to be as I can't always get there if an issue were to arise. All are running CCTV cameras so have constant traffic, and well they just work.

APM · 25 Feb 2018 at 18:42

neodude said:
That doesn't really make sense. 1mV, as in 1 millivolt? Is that even a thing?, lol

Yes.

Only saying it's worth checking the power rating of the device you want to use against the rating of the PoE gear you want to use.

neodude · 25 Feb 2018 at 21:27

APM said:
Yes.

Only saying it's worth checking the power rating of the device you want to use against the rating of the PoE gear you want to use.

POE voltage is 48V.

I doubt anything useful would be powered by 1mV

pepp77 · 25 Feb 2018 at 21:50

APM said:
Yes.

Only saying it's worth checking the power rating of the device you want to use against the rating of the PoE gear you want to use.

Yes its worth checking the power rating of a POE device, but for wattage output not voltage. Different classes of POE provide different levels of wattage to devices connected to them.

APM · 25 Feb 2018 at 22:20

My mistake millamp not millivolt

neodude · 26 Feb 2018 at 13:10

APM said:
My mistake millamp not millivolt

Even 1mA is really small. Normal current limits for a single POE port are in the 200-500mA range.

Duke · 26 Feb 2018 at 13:44

Yeah must be 1000mA?

APM · 26 Feb 2018 at 17:47

Yep.

Doh.

I think I bought a 0.5mA TPLink PoE device first then realised I needed 1.0mA.

Duke · 26 Feb 2018 at 19:38

Got there in the end

Caged · 26 Feb 2018 at 23:06

FYI TP Link PoE stuff is a bit dodgy in general - their 802.3af splitter isn't isolated so it runs the ground at -48v and the positive terminal at 0v. This isn't initially a problem - it delivers 48v DC - until you connect whatever you've powered to something else where the ground is at 0v.

Granted the cost difference is huge but we use PowerDsine (Microsemi) splitters now and never have a single issue.

Danger Phoenix · 27 Feb 2018 at 09:23

I'm powering 9 x Lilin LR7022 IP cameras with a DES-1210-28P. I believe there are smaller versions of it available