Are 300 Series switches compatible with pre-standard PoE detection in old Cisco phones?

Answered Question
Jul 7th, 2011

Are 300 Series switches compatible with pre-standard PoE detection in old Cisco phones? They don't seem to be (a 7902G won't power on when connected to an SF302-08MP with firmware version 1.1). Is any special configuration needed on the switch to enable this detection?

I have this problem too.
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Correct Answer by Ivor Diedricks about 2 years 7 months ago

Please note that the 200 and 300 Series switches now support Cisco Legacy POE as of September 2011, allowing it to deliver power to 7960, 7940, and other pre-standard phones and APs. Details provided at the following link:

https://supportforums.cisco.com/docs/DOC-18337

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Average Rating: 4 (2 ratings)
David Carr Fri, 07/08/2011 - 05:58

Arieldembling,

The 300 series switches are 802.3af standard for poe.  The older Cisco phones are powered by inline power which is indeed a different standard and wont work with our switches poe standard.

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Posted July 7, 2011 at 8:21 PM
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