I want to upgrade my chassis from TCS 4.3 to TCS 4.5 Now I have HARC with 64Mb ram and 8Mb flash. NMC_CLK with 16Mb ram and 8Mb flash (HW ver 6.0 soft compab. v 7.0.0). HDSPs 8Mb ram 2Mb flash. I want to upgrade this chassis because of modem "freezing". Do I need hardware upgrade too? If yes what I must upgrade? Is it possible DSPs to be TSC4.7 , ARC and NMC to be TCS 4.3?