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Posted by garry on September 28, 2006, 7:57 am
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Albert Manfredi wrote:
>
>> I have had conflicting information about the use of 802.3af power over
>> ethernet at 1000base-T on Cat5E cable.
>> Some people tell me there is no problem, other says that it is not
>> supported. I have googled and read the 802.3af spec and it does seem
>> to be supported. Can anyone shed any light on the current status.
>> I am aware that 802.3at POE+ is designed to operate at a higher power
>> and at gigabit speeds, but is the current situation just down to
>> individual manufacturers.
>
>
> IEEE 802.3af is no longer, so you need to go to Clause 33 or 802.3-2005.
> Clause 33 is in with the 100 Mb/s Ethernet clauses, but it applies to
> all twisted pair POE options, which means from 10 to 1000 Mb/s, at least
> for now.
>
> Bert
>
many thanks
garry
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