http://www.cdw.com/shop/products/default.aspx?EDC=568864
Can anyone tell me if this switch will be able to supply a Cisco 7940 phone with power? I've heard of PoE issues with differing switches and the like, and I don't know how to check to see if this switch will be able to drive the phone in question.
I would suspect it will not. Cisco phones do not implement standard PoE, they are proprietary.
However, when using a "dumb" PoE power supply (like the 3Com brick), a simple adapter cable (swapping the pairs for power) works just fine with Cisco phones. When using a "smart" PoE power supply that expects the device to negotiate with it, the phone won't negotiate properly and there's a good chance it won't work.
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