My mAP doesn't work with any of the 802.3af gear I have here either - don't have any 802.3at gear at this site to test with, I'll try to remember to have a look when I'm next at a site with it. Not a huge problem for me, I plan on using it with USB power - but it would be nice if it did what it said on the packet. -----Original Message----- From: Public [mailto:public-bounces@talk.mikrotik.com.au] On Behalf Of Mike Everest Sent: Friday, 5 September 2014 2:12 PM To: 'MikroTik Australia Public List' Subject: Re: [MT-AU Public] mAP and 802.3af Hi All, Results of some further investigations: I discovered that my understanding of 'type A' and 'type B' was incorrect - it is not a polarity issue at all, but related to which pairs are used to deliver power. Type A: delivers power over the data pairs (1&2, 3&6) Type B: delivers power over 'spare' pairs (3&4, 5&6) The specification apparently requires that to be considered compliant, a PoE device/client 'must' support both types, but a PoE switch/provider 'may' support either. Apparently mAP will only support 'type B' mode, and so will not work with any switch that provides only type A poe - which is all of the PoE switches that I have to test. As far as I can determine, trhis will be the case with most Cisco PoE switches and probably also majority of other vendor versions. My personal assessment of the situation is that mAP can NOT be considered 802.3af compliant, without also qualifying that statement to point out that it is only for type B capable switches. If anyone is aware of a PoE switch that does work with mAP, I will be pleased to learn if mAP does work at all with any variant of 802.3af/at! ;-) Cheers, Mike.