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Troubleshooting method for self-service queuing and calling system in banks:

1. Check if the serial port selection is correct in the window settings, usually defaulting to com1;

2. Check if the connection is correct and in the following order: extend a line from the calling host's com port to the RS232A port of the communication controller, and then connect the RS485A port of the communication controller to the repeater through a network cable. The repeater is connected to the wired caller;
3. Check if the hardware calling protocol is selected as "QJZ-02" in other settings 1 of the system settings;
4. Check if there is a hardware malfunction. The communication controller has 5 input and output channels, and you can try replacing the circuit. Other hardware can be solved by replacing it;
5. Check if the communication on the COM port of the calling host is normal and if the baud rate is 9600bps.
The self-service queuing and calling system of banks is something we need to have contact with when handling business and other situations. Therefore, when such situations occur, we need to conduct troubleshooting to minimize the efficiency of user transactions.