Image forming system for communicating with mobile terminal and setting mode of image forming apparatus

An image forming system comprising:

• an image forming apparatus configured to form an image on a recording medium;
• a plurality of mobile terminals configured to communicate with the image forming apparatus through a communication network;
• and
• a plurality of terminal devices configured to communicate with the image forming apparatus, wherein
• image data and mode information are inputted to the image forming apparatus from one of the terminal devices,
• the mode information indicates a quiet mode in which the image is formed at a predetermined formation speed, or a normal mode in which the image is formed at a faster formation speed than the quiet mode,
• each of the mobile terminals is settable to a vibrate mode in which an alert sound of the mobile terminal is suppressed,
• setting information indicating the quiet mode is set on each of the mobile terminals when the mobile terminal is set to the vibrate mode,
• the image forming apparatus
• generates location information indicating positions of the mobile terminals based on communication between the image forming apparatus and the mobile terminals,
• determines whether the mode information indicates the normal mode or the quiet mode when the mode information and the image data are inputted from the one of the terminal devices,
• sets to the quiet mode and forms the image based on the image data in the quiet mode when determining that the mode information indicates the quiet mode,
• determines whether or not the setting information is acquired from a mobile terminal located nearest to the image forming apparatus when determining that the mode information indicates the normal mode,
• sets to the quiet mode, forms the image based on the image data in the quiet mode, and notifies the one of the terminal devices that the quiet mode is set when determining that the setting information is acquired from the mobile terminal located nearest to the image forming apparatus, and
• sets to the normal mode and forms the image based on the image data in the normal mode when determining that the setting information is not acquired from the mobile terminal located nearest to the image forming apparatus, and
• the image data indicates the image.