Assembling telephone sets TM can operate in difficult industrial conditions at extensive humidity and high degree of dustiness. They have been designed particularly for the mine communication services supervising the tele-technical networks. They may be connected to any subscriber's telephone lines, including among others Integrated System of Telephone and Dispatchers Emergency and Loudspeaking Communication STAR-N (STAR-M). The TM telephone set enables checking the lines and subscribers' equipment through connecting with a telephone exchange, after entering any subscriber's line, as well as for receiving a calling signal by the use of optical and acoustic signaling device.

With any telephone exchange or station equipment of STAR-N (STAR-M) systems.

Central from the subscribers' equipment of the telephone exchanges or line units ZLD (ZLT) of STAR-N (STAR-M) systems.