Universal telephone ST Tm 3003 can be connected to the telephone lines of various types and characteristics. It is convenient for installation on official places where less number of line connections is needed i.e. auxiliary operating station services on main railway lines and main services on secondary non-electrified railway lines.

System telephone represents integrated communication system which enables autonomous operation.

Telephone has same functional characteristics as operator console TKP Tm 4304 type and the connection possibility of 8 programmable line terminals.