Possibly, the international telephone connections you talk about appeared as a result of using the Dial-Up access to the Internet via the telephone line. These connections are possible when you access some of the banners or references containing texts like "Free instant access". In most cases such links refer you to sites of specific content. If you accept the proposal, a window will appear with a text in English, intending to obtain your affirmative answer for installation and use of an Internet access program of a foreign operator. If you click "Please Enter Now!” ("Enter", "Next", "Ok"), a program will be installed in your computer, visible or hidden, which will interrupt your current connection with your local operator and will dials an international telephone number, by which the computer immediately (then implicitly) will make the Internet connection. The access can take place even in your absence, suffice that your computer is connected to the telephone line.
As a consequence, at the end of the month the fixed service provider will charge you for international phone calls according to the tariffs in force, as you used an international connection to access the Internet. The cost of such connections can reach 100 lei/minute, even more, depending on the country, daytime, weekday when the connections took place.
If you are a Dial-Up Internet user, in order to avoid unsolicited international connections, we suggest that you have the service „password restriction of outgoing calls” activated, settling this issue with the service provider. The activation of this service shall bar the unauthorized access to dialing international numbers.
We also recommend that you avoid accessing all kinds of dubious banners or references with inscriptions "Free (instant) access", "No credit card required", etc, and use firewall, antispyware and antivirus programs.