What is the method of communication for application files between the site controller and the workstation (POS)?

The method of communication for application files between the site controller and the workstation (POS) is predominantly through serial communications. This is a traditional and effective method for transferring data directly between devices that may be located in close proximity to each other. Serial communication allows for a simple point-to-point connection where data is sent one bit at a time over a single communication channel, which can be advantageous in terms of reliability and simplicity in certain environments.

Especially in retail and hospitality settings where POS systems are common, serial communication can ensure that the transferring of application files is done in a straightforward manner without the complications that might come with more complex communication protocols. This method allows devices to communicate effectively while maintaining a stable connection, which is essential in environments where transaction speed and data integrity are critical.