spec me a poe powered switch

233

233

233

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basically extending my home network and wanting to mount a 4 port switch in the airing cupboard.

Cat 5/6 is an easy feed but i dont really fancy trying to run a power feed into the cupboard.

daft question but would a poe powered switch generate a large amount of heat going through the cat 5/6 cable feeding it(and safe to use in an enclosed space) and is there any adverse effects from using a poe switch

ideally want something gigabit
 
UniFi US-8 (not US-8-60w) or Netgear GS105PE spring to mind. I've used both and don't remember either of them getting overly hot but they were in an open environment, they may not like being in an airing cupboard.

Are you wanting to power any PoE devices from that switch?
 
no will just be feeding a couple of TVs/ps4s and maybe just maybe a Ubuiqti access point so possibly one POE
 
What PoE switch are you planning to power this new switch from? If it happens to be an 802.3at switch then you'll have a greater budget to play with for the potential new access point.

I'm assuming it'll be powered by 802.3af, so that Netgear switch would give you 7.9w (according to the datasheet) to play with which should be fine for an AP. Checking my setup here I see my 3 x Unifi AP-AC-LR's are each drawing between 3.3 - 4w each.

UniFi state that the US-8 can use at most 12w to power itself so if it's powered by 802.3af you could have as little as 3.4w left for the AP. If using an 802.3at switch you'd have around 18w left.

So if you're planning on plugging an AP into this new switch and the switch will be powered by 802.3af then I'd say the UniFi switch is not an option. You could potentially power it with an 802.3at PoE injector though.
 
ok that above is all double dutch to me lol sorry guys


can someone recommend me a pair of switches (one for under the stairs which can be pljgged into the mains and does POE and a POE powered switch for up in the airing cupboard. above and a decent AP (i'm drawn towards the ubiqtui stuff as it seems to get a good right up from everyone.

say maz budet £350 including the AP?
 
Is it not possible to run a few additional cables rather than doing this? In the opening post, you mention wanting only a four-port switch which implies that you'd only need to run three cables.
 
I run a TP-Link TL-SG1008P in my loft which powers my Unifi AC-Pro plus 3x PoE Unifi Cameras. Really good value for money.

Edit: Sorry I totally misread the OP! Ignore the above.
 
Last edited:
bremen1874 said:
Is it not possible to run a few additional cables rather than doing this? In the opening post, you mention wanting only a four-port switch which implies that you'd only need to run three cables.
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i'll actually be running 2 cables one to connect to the hub and one to act as a spare. i like the idea of just plonking a switch into the cupboard as its much easier to feed cables to and from there than down stairs as and when i change things
 
If it was at all feasible I'd run multiple cables up to the airing cupboard and terminate them there. You can then run cables from there to where ever you want them, now, and in the future.

Better for bandwidth and a fraction of the cost.
 
problem i have is space, i can get 1 and possibly 2 at a very push up into the airing cupboard.

if i can get one with a 8 port switch i've covered all my bases
 
Duke said:
Wouldn't a switch get a bit warm in an airing cupboard?
Click to expand...

well i say airing cupboard its just a storage cupboard these days, probaly 30 inches wide 30 deep and about 6 1/2 feet high top shelf (say top 2 feet of the cupboard would be left empty for the switch itself.
 
233 said:
ok that above is all double dutch to me lol sorry guys
Click to expand...

What I'm trying to work out is, is there enough power available on the feed from the downstairs switch to power the switch in the cupboard and the access point that you want to connect to that switch.

There's a few different PoE standards, that's the 802.3 stuff. Each standard can deliver a different maximum power so you need to consider how much power the downstairs switch can deliver, how much power the cupboard switch needs to run and how much power the access point needs.

802.3af PoE will deliver 15.4w. 802.3at (also known as PoE+) will deliver 30w and 802.3bt will deliver 60w (I think I'd have to check that one). So if your switch in the cupboard needs 12w to run and your access point needs 5w then you won't be able to power them both from an 802.3af switch downstairs.

Another option is to power the switch in the cupboard using a PoE injector. So the PoE outout on the downstairs switch isn't actually used, there's a box that sits between the two switches which plugs into the mains and powers the upstairs switch. You can get injectors that are to different standards, the 802.3 standards I mentioned earlier.

I won't recommend a specific AP to you, without knowing your house I can't say that a given AP will give enough coverage. I will say that I like Ubiquiti access points though.

How many ports do you want on the switch downstairs? I'll have a look at options tomorrow.
 
dont actually need any downstairs as it will sit in the same rack at a 16 port switch and my cctv stuff
 
Ok, so I'd suggest a UniFi US-8 in the cupboard that's powered by an 802.3bt PoE injector. From a quick Google there doesn't seem to be much to choose from, I know we're using a couple of POE-171A-60's at work which seem to work OK though I don't much like Planet kit.

Connect a patch cable from a switch port in the downstairs switch and connect it to the port labelled as 'ethernet' in the injector. Connect the injector to power using the supplied power adapter then connect a cable from the 'ethernet + DC' port on the injector to port 1 on the US-8 (it's labelled as PoE in). The switch should then power up.

When you've bought your access point, connect that to port 8 (labelled PoE out)on the US-8 and you should be good to go.

This setup would work fine as long as you're not wanting any other devices to be powered by PoE from the US-8 - that switch only has 1 PoE output.
 
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