transmitting a voice recognition activation signal more than a set amount of times or an at crmp command signal defined in the 3gpp 27 007 specification if the command signal for a ring output control of the ag 200 is the signal of transmitting a voice recognition activation signal more than the set amount of times the ring output request key of the hf 100 can be activated by pressing a voice recognition activation key several times if the command signal for a ring output control of the ag 200 is the at crmp command signal the ring output request key of the hf 100 can be realized by a separate key for transmitting the at crmp command signal if the command signal for a ring output control is received from the hf 100 in a state where the service level connection is established between the hf 100 and the ag 200 the ag 200 rings for example if the command signal for a ring output control of the ag 200 is implemented by transmitting a voice recognition activation signal more than the set amount of times when the voice recognition activation signal is received from the hf 100 the ag 200 determines the number of received voice recognition activation signals if the number of received voice recognition activation signals is greater than a set number the ag 200 rings if the command signal for a ring output control of the ag 200 is the at crmp command signal when the at crmp command signal is received the ag 200 rings thus in a bluetooth u00ae hands free and a mobile communication terminal according to the present invention which are configured as described above a user can control the mobile communication terminal to ring using the.