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

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Jul 7th, 2011
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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?

Correct Answer by Ivor Diedricks about 5 years 6 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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David Carr Fri, 07/08/2011 - 05:58
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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.

Correct Answer
Ivor Diedricks Tue, 09/06/2011 - 19:31
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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