Isango lasefama lidla ngokwenziwa ngeetyhubhu ezijikelezileyo kunye nothango lwengcingo oludityanisiweyo, ezinye zenziwe ngeetyhubhu ezisikwere.
Ngokwezakhiwo ezahlukeneyo zangaphakathi, isango lefama lingahlulwa libe luhlobo “N” lwesango lefama, “mna” chwetheza isango lefama, kunye nesango lefama yebha. Uhlobo lwe "N" lwesango lasefama kunye no "Mna" luhlobo lwesango lasefama, ngesiqhelo luyakwenziwa ngesakhelo esingaphandle setyhubhu kunye nocingo lwangaphakathi oludityanisiweyo, emva koko kwenziwe ezinye iityhubhu zangaphakathi njengezixhasi. Isango lefama yefama lidla ngokwenziwa ngeetyhubhu ezijikelezayo kuphela .