1. Sign-in: Check whether the power supply is plugged in and whether the telephone line is connected to the POS machine. Sign-in is the first step after booting. Generally, press 1.

2. Enter the teller number 0 1 and password 0000, and then wait for the connection.

3. The 3.pos machine will open automatically. Credit card is displayed on the machine. At this time, swipe your card, check the card number and press "Confirm", as shown in Figure 2.

Figure 1

Figure 2

4. Enter the amount (at this time, the "0" key is used to carry it forward, and the "reset" key is used to abdicate), and then press "OK" to let the customer enter the password on the keyboard, and press "OK" to automatically print the consumption receipt (at this time, the credit card is successfully swiped).