24/48 port PoE Injectors

[robjduk]

Hi all,

Are rack mounted 24 or 48 port PoE injectors still a thing? I assume I need to change a switch out to a PoE one to do what I want to do but a 1U, 48 port injector in each cabinet would sort out everything i need but after an initial search they look like old hat nowadays.

 

Ta all

[snagrat]

They are called Midspans but can't see why anyone would make them now.

 

Plus probably cheaper to buy a switch

[MatthewL]

Surely its just easier to put in a 24/48 port PoE switch?

[XiJ]

Seems you'd only need a midspan if you had heavy power requirements. I would imagine in most cases a PoE switch would be okay

[synaesthesia]

I've found those things particularly unreliable and have replaced quite a few with POE switches in their place. From experience they often get used when people don't want to mix switch vendors for whatever reason

[Sephiroth]

We used midspans as an alternative to poe switching for a campus that we took over. Same brand as these and we've had no issues so far. We got fully managed ones so we can turn off ports remotely.

 

http://m.comms-express.com/products/microsemi-24-port-poe-midspan-10-100-1000baset-ac-input-w-management/

[Davit2005]

Cheap 2nd hand Cisco, HP or 3com switches off ebay and maybe one spare just in case for quick swap out?? Jus a thought.

[robjduk]

thought that would be the case but just wondered. Thanks all.

[PotNoodleTech]

It adds a layer of complexity, an extra piece of equipment, and a load of extra cabling. My advice would be to purchase a 24/48 port POE switch. If you can't afford Cisco (most of us can't) then look at HP or Ubiquiti.

[Geoff]

If you do need the extra juice that would normally require a midspan you can get an extra power unit that daisy chains off the PoE switch. For example if you got hold of an old HP 2650-PWR (J8165A) then you could also get a Procurve 600 External PSU (J8168A) to give you the juice. Although I'm not exactly sure what needs that kind of power (our 2620-48's manage a full bank of VoIP phones on their internal PSU without problems). Edited May 9, 2017 by Geoff