WE HAVE PURCHASED 3 NUMBERS OF POE SWITCHES ( MODEL- C1000-24FP-4G-L)SERIAL NUMBERS AS MENTIONED BELOWFOC2822Y15J/ FOC2822Y181/ FOC2822Y18TFACING RMA ISSUES. WARRANTY NOT SHOWING AS PER DNA ESSENTIALS FOR 5 YRS FOR THESE ABOVE-MENTIONED POE SWITCHES....