DSF50-T-BT-12E-1-B-SB-PF DSF50-T-BT-12E-1-C-T DSF50-T-BT-15E-1-Y-E DSF50-T-BT-16E-1-C-FSK DSF50-T-BT-16E-1-C-S DSF50-T-BT-16E-1-C-T-FSK DSF521 DSF521(TH3 DSF521(TH3,F,T) DSF521(TH3.F)