This work deals with the preparation and characterization of different compositions in the mixed system 80% (Ag1-xCuxI)-20% (2Ag(2)O . P2O5) (0.05 less than or equal to x less than or equal to 0.25). Solid samples were synthesized by quenching the appropriate molten mixtures and characterized by X-ray diffraction (XRD), differential scanning calorimetry (DSC), complex impedance and transport number techniques. The XRD data have indicated the formation of glassy phases mixed with AgI or other polycrystalline phases. From the DSC measurements it is clear that a glass transition temperature around 327 K is exhibited by these specimens. The complex impedance studies carried out in the frequency range 65.5 kHz-1 Hz and transport number analysis suggest that the best conducting composition, namely 80% (Ag0.9Cu0.1I)-20% (2Ag(2)O . P2O5), would possess a silver ionic conductivity of 8.64 X 10(-3) S cm(-1) at room temperature.