A mobile terminal is suitable for use with a control terminal in a wireless communications network. The control terminal is configured with switching control identification data that are associated with predetermined ring tones parameters such that the control terminal is capable of outputting a control signal based on the number or duration of ring tones received thereby from an authorized caller. Upon receipt of control code data via a user input unit, a processor unit of the mobile terminal enables establishing of a communications link with the control terminal with reference to a call data code portion of the control code data, and terminates automatically the communications link after a duration corresponding to a termination control code portion of the control code data.