General credit card unilateral account is often caused by poor network signal. The POS machine used for credit card deduction has a bad signal when accepting payment from the issuing bank, resulting in no signal from the issuing bank and no payment, but the user's credit card prompts for deduction, but the transaction is a failure for the POS machine.
In this process, the amount of the user's credit card is frozen by the bank, and the bank will return the money to the user's credit card account during liquidation.
-POS (point of sale) is a multifunctional terminal. It can be installed in special merchants and acceptance outlets of credit cards, and connected with computers to realize automatic transfer of electronic funds. It has the functions of supporting consumption, pre-authorization, balance inquiry and transfer, and is safe, fast and reliable to use. The basic principle of POS system is to create commodity data in a computer file, directly read the barcode on the commodity through the online structure of the computer cash register and the optical reading device on the cash register equipment (or directly input the code through the keyboard), and then display the commodity information (unit price, department, discount ...) immediately, so as to speed up the cash register and correct it.
The detailed information of each commodity sale (price, department, time period and customer level) is automatically recorded and then sent back to the computer by the online framework. Through computer calculation and processing, various sales statistics and analysis information can be generated as the basis for management.
The POS machine reads the magnetic stripe information on the cardholder's bank card through the card reader, the POS machine operator inputs the transaction amount, and the cardholder inputs the personal identification information (i.e. password). The POS machine sends the information to the issuing bank system through the UnionPay center to complete the online transaction, give the information of success or failure, and print the corresponding bill. The application of POS realizes the online consumption of credit cards, debit cards and other bank cards, ensures the safety, rapidity and accuracy of transactions, avoids complicated labor such as manual blacklist inquiry and bill pressing, and improves work efficiency. The design requirements of magnetic stripe card module meet the needs of three-track magnetic cards, that is, the module should be able to read magnetic cards with 1/2, 2/3 and 1/2/3 tracks.
Processing flow:
First, prepare the relevant POS machine to go through the formalities and stamp the copy.
Second, submit the data for review, sign a contract after approval, and prepare to install the POS machine.
Third, you can complete the simple training of door-to-door installation and pos card swiping, and both fixed and mobile POS machines can be handled.