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POE Wiring

I am curius as to what pairs Cisco uses to send the power from a powered switch to a device. We have a Aironet 1231G that is plugged in to a Cisco 3550 Powered Switch, but I can not get the switch to power from the Ethernet Cable (CAT 6). I do not know what pairs they have punched down but I have seen them (our electricians) just punch down 1,2,3,& 6. Any input would be appreciated. Thank you in advance!

2 REPLIES
Hall of Fame Super Red

Re: POE Wiring

Hi Ken,

Check out this link. There is a good description of PoE wiring.

http://www.cisco.com/en/US/netsol/ns340/ns394/ns147/ns412/networking_solutions_white_paper09186a00801f4325.shtml

As a side comment, the electricians should always punch down all 4 pairs on a RJ45/CAT 6 jack following the TIA/EIA standards.

Hope this helps!

Rob

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Re: POE Wiring

Inline power switch uses pins 1,2,3,6

Inline power patch panel uses pins 4,5,78

Power injector uses 4,5,7,8

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