Company Temax d.o.o. has manufactured and delivered extensive equipment and spare parts in electronic technology applied for substitution of relay devices in railway line telephone systems for Serbian and Montenegro Railways. Besides, important business result is the complete substitution of dispatching centre telephone system in Belgrade Marshalling Station. In this project realization is installed extensive and various indoor and outdoor telecommunication equipment.

The most part of these projects are realized in accordance with programs of European Investment Bank.

Beside Railways of Serbia and Montenegro as major buyers and users, successful business collaboration is with great rolling stock refurbish companies as Šinvoz a.d.-Zrenjanin and Želvoz d.o.o.-Smederevo. In cooperation with these companies for multiple-unit set series EMV 412/416 and rail bus series 812/814 train's loudspeaker equipment are built.