1. Speech unit ( 2 ) connected to a microphone ( 1 ) for generating user-network-commands according to electric signals provided by said microphone ( 1 ) to control a remotely controllable device ( 11 ) connected to said speech unit ( 2 ), characterized by a control unit ( 4 ) to send control-network-commands to said device ( 11 ) connected to said speech recognition device so that said device ( 11 ) transmits device or medium dependent vocabulary and/or grammars and corresponding user-network-commands to said speech recognition device and to receive data and messages from said device ( 11 ); and a memory ( 7 b, 7 d ) to store said device or medium dependent vocabulary and/or grammars and corresponding user-network-commands transmitted by said remotely controllable device ( 11 ) connected to said speech recognition device.