Disable PoE ports SG200-26P

[iChristiaan]

I am thinking of buying a SG200-26P switch and have a few questions:

Is it possible to disable the PoE function on the 12 PoE ports?

I need al the ports but only 6 with PoE.

What happens when you connect a non PoE device to a PoE port?

Thnx Chris

Sent from Cisco Technical Support iPad App

[Liam Kenneally]

Hi Chris,

In Regards to your questions:-

Is it possible to disable the PoE function on the 12 PoE ports?

I have never played with the Cisco Linksys kit.

I know on the Cisco 3550's you could use the "no power inline" or "power inline never"

What happens when you connect a non PoE device to a PoE port?

A self test process is run, known as SDP(Signature detection process)

Before a POE switch or midspan (known as a PSE, for power sourcing equipment) can enable power to a connected IP camera or other equipment (known as a PD, for powered device), it must perform a signature detection process.

Signature detection uses a lower voltage to detect a characteristic signature of IEEE-compatible PDs (a 25kOhm resistance).  Once this signature has been detected, the PSE knows that higher voltages can be safely applied.

Here is a good link on PoE:-

http://www.veracityglobal.com/support/articles-and-white-papers/poe-explained-part-2.aspx

HTH.

Kind Regards,

Liam

[Tom Watts]

Hi Chris, you may turn off the POE on any port you like. Port Management -> POE -> Settings. Choose the POE port then remove the adminstrative status and save it.

The problem with the SX200,300, 500 models, since they are capable to power legacy POE phones they may have false detection and try to supply power to other devices such as a POE switch which in turn can make some behavioral problems so I'd recommend to disable POE on ports connecting to other non-poe and poe devices to keep everything as clean as possible.

-Tom
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