Abstract: The invention relates to a method for securing the transfer of cipher keys and security codes between a mobile equipment (100, 300, ME) in a radio network and a SIM card (305) attached thereto. In the method according to the invention the mobile equipment and the SIM card attached thereto are first authenticated separately. After successful authentication, a cipher key KSM is given to the mobile equipment and the SIM card to be used by them. This cipher key is used to encrypt all other exchanges of passwords and security codes between the mobile equipment and the SIM card.

Abstract: The object of the invention is a method to establish an outgoing connection in a cellular system, a cellular system and a terminal. The invention is preferably applied in wireless subscriber interface systems, or in WLL systems (Wireless Local Loop). An idea of the invention is that when the terminal is set off-hook, then the tone generator (336) of the terminal generates a dial tone, which is supplied to the subscriber device (301), indicating that dialing can be started. The symbols dialed are stored as sampled symbol signals in a register (320) of the terminal (302) until a transparent audio signal communication link is established from the terminal (302) to the exchange (353). Then the symbol signals stored in the terminal's (302) register (320) are transmitted from the terminal (302) to the exchange (353). With the solution according to the invention it is possible to start dialing immediately when the subscriber device (301) is set off-hook.