TN54NS4T01 is a 100G OTN line board (40000 ps/nm,LH,HFEC,Coherent Tunable,50GHz,LC), converts 80*ODU0, 80*ODUflex, 40*ODU1, 10*ODU2, 10*ODU2e, 2*ODU3, 1*ODU4 into one OTU4 signal. TN54NS4T01 can apply to Huawei OSN8800. In general OSN 8800 T64/T32 subrack and OSN 8800 universal platform subrack, TN54NS4T01 can work only in relay mode, If you need TN54NS4T01 works in line mode, enhanced OSN 8800 T64 subrack must use TNK2USXH+TNK2UXCT, enhanced OSN 8800 T32 subrack must use the TN52UXCH/TN52UXCM and OSN 8800 T16 subrack must use TN16UXCM.