System for operating accessory equipment for mobile terminal in information technology application (IT) device, transmits data between IT device and accessory equipment, when wired audio interface of accessory equipment is used

摘要

The system connects additional device with an audio interface (50) of IT device (55). The data is transmitted between IT devices along the specific directions, when wired audio interface for the power supply of the accessory equipment (57b) is used. The wired audio interface is provided with inlet channel and output channel. The input channels are designed as line or microphone input. The output channels are designed as line or speaker or headphones. An independent claim is included for method for performing data connection between IT device and accessory equipment.