Valsts valodas centra izstrādātie transporta, infrastruktūras un sakaru termini

Konteksts: [..] Calls which are free of charge to the calling subscriber, including calls to helplines, are not to be identified in the calling subscriber's itemised bill [..]
Avots: Directive 2002/22/EC of the European Parliament and of the Council of 7 March 2002 on universal service and users' rights relating to electronic communications networks and services (Universal Service Directive)