CISCO SG110-16 - poe supply lines

[unclesteve]

Please be nice, as this may be a dumb question.

I have a CISCO SG110-16 which is supposed to be POE, however trying to test which pins of the RJ45 socket has a voltage across them, I could not find any voltage across the pins. What am I missing please? I'm wondering if there has to be some sort of resistance across some of the pins before the unit powers up the RJ45?

Thanks in advance for any guidance.

 

[Dan]

Hi @unclesteve

Do you have a CISCO SG110-16 or a CISCO SG110-16HP?

If it is a SG110-16 then that is the non-PoE model, see the table below:

 

[unclesteve]

Label shown off the back of the CISCO unit.

 

[Phil]

It does seem that you have the version of the switch that does not provide POE power

I'm wondering if there has to be some sort of resistance across some of the pins before the unit powers up the RJ45?

Also, there is a 'handshake' between the POE switch and the POE-powered device e.g. the switch will test first whether the device can accept POE power, and will only supply POE power if that check is successful.

 

[unclesteve]

Doh... Looks like I'll be selling two virtually new CISCO switches.