This describes how to add BSC boards or configure the attributes of the BSC boards. When the BM and TC are configured in different subracks, the GDPUC/GDPUX, GEIUA/GOIUA, GEIUT/GOIUT, GEIUB/GOIUB, GEHUB, GFGUB/GOGUB, GXPUM, GXPUT, GGCU, GTNU, and GSCU must be configured.