Wireless Access

Would someone provide a discussion of the complexities involved providing mid-span PoE on a GbE circuit?  I have read the discussion on this topic a couple of times in the CWNA study guide but I am still missing something.  It seems the book indicates it can't be done because all of the copper wires are being used.  Help, and Thanks.

The last time I looked, midspan power injection on GB links is not standardized.  However it is not technically a standard violation to manufacture an ethernet bridge that terminates the GE segments and applies power as an endspan.  I suspect that is what the GE midspan poe "injectors" that are available on the market and claim to be "compliant" are doing.

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@Rquinn wrote:

Would someone provide a discussion of the complexities involved providing mid-span PoE on a GbE circuit?  I have read the discussion on this topic a couple of times in the CWNA study guide but I am still missing something.  It seems the book indicates it can't be done because all of the copper wires are being used.  Help, and Thanks.

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When you say complexities, what do you mean?  There are products that do this today:  http://www.microsemi.com/products/poe-systems/single-port-midspans

Unless I am misunderstanding you...

Here is the statement I am trying to understand:

Notice on line two where the sentence begins with "1000BaseT devices".  This is from Chapter 17 (PoE) of the CWNA study guide (PW0-104).

Hey...ask CWNP what they mean!