Binary and ternary TeO2 based oxy-chloride glass systems have been prepared and characterised by absorption and low-temperature photoluminescence spectroscopy, and by the measurements of do electrical conductivity. Prepared glasses exhibit transmittance 75-80% in a broad transmission range 0.3 - 6.5 mu m with modest shift of upper absorption edge to longer wavelength as heavier ions are introduced into the system. Electronic transitions between 4f-4f inner shells of Pr3+ ions embedded into the host glass have been investigated in a wide temperature range as a function of used precursors used for doping. The temperature dependence of do electrical conductivity exhibits Arrhenius plots with the single activation energy.