If Portugal Telecom did not follow the reduction in prices, Portugal assumes that it would not only lose all mobile-to-mobile and mobile-to-foreign network traffic but also 15 % of its fixed voice-telephony traffic to the mobile operators, which would correspond to a loss of Esc 27 billion in the period 1996 to 2000, or alternatively, if Portugal Telecom decreased its international tariffs, the loss of revenue would correspond to a loss of Esc 25 billion in the period.