A system of (100-x)B₂O₃ ⋅xCdSO₄ glasses (0 x  40) is set by the ordinary quenching method. Density (), molar volume (V) and oxygen ion density (N) are found to increase with the increase of CdSO₄ in the samples. The dc conductivity () and the ac conductivity () are measured in the temperature range from 308 to 735 K.  is found to follow the thermal activation Arrhenius relation with activation energies between 0.36 and 0.76 eV. Ac conductivity and the exponent factor (s) confirm that the CBH model is the origin of the conduction. The dielectric constant (휀′) and loss (휀″) are studied as a function of the temperature and frequency. The dielectric data are fitted according to the Cole–Cole equations. The values of  parameter are found to vary between 0.2 and 0.58 which means that these glasses exhibit a wide distribution of relaxation times.