The basic principle of the POS machine is: by inserting a credit card or debit card into the POS machine or performing contactless reading on the POS machine, the POS machine transmits the card information to the bank or payment gateway for verification and authorization. If the transaction is authorized, the POS machine prints a receipt and sends the transaction information back to the bank or payment gateway for processing.
The working principle of the POS machine mainly includes the following steps:
1. Card reading: The POS machine reads the customer's credit or debit card.
2. Transaction request: The POS machine sends the transaction information to the bank or payment gateway for verification.
3. Transaction authorization: The bank or payment gateway verifies the transaction information and decides whether to authorize the transaction.
4. Print receipt: If the transaction is authorized, the POS will print a receipt.
5. Transaction processing: The bank or payment gateway transmits the transaction information back to the customer's bank for processing.
This is the basic principle of the POS machine, which ensures that the transaction is fast, safe, and reliable.
