We have many D-Link switches with PoE and I have a necessity to connect an AP Cisco 1232 AG to one of these switches, using the PoE technology. Unfortunately, it does not work. Once in the past, having connected Cisco 1232 AG to D-Link 3426P I successfully powered-up AP through UTP cable, I just plugged the cable into AP and it started working, but now I can't understand how this happened. After that, whatever I did, I've never been able to make Cisco 1232 AG work in pair with any D-Link equipment (using PoE). I tried different models of D-Link switches (DGS-3426P, DES-1316, DWS-3024 - they all meet the 802.3af standard), I tried another Cisco 1232 - nothing. What could be the reason?
P.S. On D-Link switches PoE state enabled on all ports, power settings - auto or class 3 (12.95 W), cables - UTP Cat 5e.