general assessment: privatization and modernization of the Czech telecommunication system got a late start but is advancing steadily; growth in the use of mobile cellular telephones is particularly vigorous domestic: 86% of exchanges now digital; existing copper subscriber systems now being enhanced with Asymmetric Digital Subscriber Line (ADSL) equipment to accommodate Internet and other digital signals; trunk systems include fiber-optic cable and microwave radio relay international: satellite earth stations - 2 Intersputnik (Atlantic and Indian Ocean regions), 1 Intelsat, 1 Eutelsat, 1 Inmarsat, 1 Globalstar