Abstract: The present invention discloses a method of preventing a PHS handset from being reassigned to a new phone number by installing an encryption program in a PHS handset. The encryption comprises an encryption algorithm, and such encryption algorithm can compute a coded password from a specific code, such that after the phone number is coded into the PHS handset for the first time, a user needs to run such encryption program if it is necessary to reassign a new phone number to the PHS handset. Therefore, the user needs to enter a correct password before the PHS handset can be recoded, and thus can avoid the PHS handset from being recoded without authorization.

Abstract: A method and apparatus for providing a user-selectable sound profile for a telecommunications device, wherein the user may select at least one available frequency response profile to be applied to an audio signal by a digital equalizer.

Abstract: The present invention relates to an intelligent telephone system, operating methods related to the system are also disclosed. The intelligent telephone is capable of programming operating procedures as a shortcut for re-operating in the future. Furthermore, achieve the purpose of conveniently operating some complicated operating processes for a user, and being capable of automatically performing in a preset time limit. The intelligent telephone system includes storage means, a ROM (Read Only Memory), an LCD (Liquid Crystal Display), a telephone interface, a CPU (Central Processing Unit), and a user inputting interface. The user interface is used for receiving audio information and commands for controlling operations to shortcuts. In software structure, the intelligent system includes a system control module, a shortcut functional module, and lots of software modules. The system control module gives control rights and relative messages to the shortcut functional module.