We are deploying Mitel 5360 phones to a site with an Extreme Networks Summit 440 switch. We seem to be having POE problems that point to an unsolvable compatibility issue, but I wanted to check to see if anyone else may have any clues. The Mitel phones get POE just fine when they are connected direct to the extreme, but we have a few offices that need second small switch because there are several devices in there with only 1 lan drop. The decision was made to try the Netgear Prosafe GS105PE which is a POE passthrough switch.
When phones are connected directly to the Extreme, everything works well. Unfortunately, when the Netgear switch is in between, it seems to draw enough power to power the Netgear switch but doesn't power up the phones. When I check the POE info on the Extreme Switch port that the Netgear connects to I see about 1.5w of power draw. When we add a phone, that power draw doesn't change at all.
We've tried Netgear support and Extreme support and they can't figure out the issue so it looks like its just one of those "compatibility issues" but I figured I'd check here to see if anyone has ever ran into anything similar and found a fix.