We have a lot of ISW 8-10/100P,4-FSP and Pelco IP Cam, powered by PoE, delivered from ISW. Some of ISW stop delivering PoE and after a time can start provide PoE. In console for "show poe" i have "No PD detected" but device is connected and working with other power supply. Power budget is ok. Only 1 or 2 cameras per 1 ISW with SDR-240-48. Main thing that the all complexes were working before. And now we have about 20 ISW from ~300 with the same issue.