12: 12=12 Port; 24= 24 Port; 36=36 Port; 48= 48 Port

FNS: FNS=FC Square; TNT=ST Thread; CSF=SC Simplex Flange; CDF=SC Duplex Flange;

LDP=LC Duplex SC Footprint; LSS=LC Simplex Square; LDS=LC Duplex Square

S: S=with Splice Tray; Blank=w/o Splice Tray