Desc: Potpisani - Telefonska centrala: Directed by Marko Kovac. With Bojan Aleksic, Bude Budisavljevic, Nikola Dakic, Milan Z. Djukic. 1941. Serbia is under German occupation. A small illegal partisan group, hidden in a Belgrade apartment, has the task to blow up (take off in the air) the main telephone exchange in the city and literally they do that.