The first telecommunication devices used for military links were telephone-telegraphic devices. Its difficult for us to imagine command with huge armies in World War I, without the using of telegraph and telephone. Also, the first telecommunication devices produced in Yugoslav factories after World War II were field switchboard type MP-10 and field telephone type PTI-49 , which are in this category telecommunication devices.
Wire communication in the Yugoslav People's Army made the base of system of communication and on they relied radio and radio-relay connection. They were sorted to stationary and mobile. Stationary wire communications were used for commercial technical solutions and they monitored the development of "civilian telecommunication". They were highly integrated in the telecommunication system of the former Yugoslavia. Portable wire communications were used for the connection between the units and the commands on the terrain, also for successfully changing, with combat operations to enemy, damaged and destroyed parts of telecommunication system.