USB powered switch?

casper_uk · 25 Jul 2021 at 19:02

Hiya,

Does anyone know if there is such a thing as a 1000 Mbps switch that can be powered by usb? I think usb-c can push 15w at 5 volts (3 amps)? which seems like it should be enough in theory, but am struggling to find anyone that has done it before.

https://www.overclockers.co.uk/tp-l...rts-plastic-case-tl-sg1005d-v9-nw-174-tp.html

This item uses a power supply that has an output of 9V 0.6A for example. Has anyone tried this before?

Cheers

casper_uk · 25 Jul 2021 at 20:03

whitecrook said:
Actually the switch i mentioned above is the flex mini and it also can be usb c powered. So there you go

USW Flex MiniBuild and expand your network with the UniFi Switch, part of the Ubiquiti Networks UniFi Enterprise System. The UniFi Switch, model USW-Flex-Mini, is a smart managed Gigabit switch. It offers 5 RJ45 Ethernet ports, providing 1 Gigabit links to your devices. Power up the USW-Flex-Mini with the included USB Type-C power adapter or with 802.3af PoE Ethernet in port 1.

Excellent news, thanks! Also I think I know what 802.3af means now

There is a network cable already in the location I want to put the switch. If i plug that into the first slot, it should have enough power to run any other ethernet cables I plug in yes?

casper_uk · 26 Jul 2021 at 04:57

whitecrook said:
To avoid any doubt this switch only can BE powered via poe. It does not pass through or power any devices itself

to power this
via poe you will meed a poe injector or a poe switch upstream

the point is you dont need to plug this in to a wall or a usb , only the network, which you were gonna do anyway, right .

Bad choice of words from myself. I blame working nights and being half asleep when posting

I was planning to plug a normal ethernet cable from my virgin router, to this switch. Then two other cables to my server and a mesh WiFi disc. The two other cables just need to connect to the network, no poe power required. Does this sound feasible? Or do I need a Poe injector (what ever one is) from the router to switch to power the switch?

Maybe a usb cable would be easier after all

casper_uk · 26 Jul 2021 at 10:55

whitecrook said:
what are you planning to plug the usb cable into?

Back of the server, usb-c port. Thanks for all the information everyone, learnt a bit more which is always good

casper_uk · 26 Jul 2021 at 12:26

whitecrook said:
if your server reboots / goes down you will lose power to your switch...

Your server presumably is plugged in to the wall, so wouldn't it just make more sense to plug any switch into the same power socket ?

What's with all this common sense and logic? Am i really still on planet earth?

A very good point that is. I won't have a spare socket but I could always try and get something sorted i suppose