If you don't have the USB flash drive function, you can't connect to the device. First, check your settings before adding or modifying devices.

1, the equipment type can be selected from IT2200A to system configuration.

2. The communication mode is serial port 232.

3. The search range is that your phone number is 1 and the range is 1- 1.

4, choose a good port is generally a serial port 1.

5. Click Next and check that the connection cable is plugged in.

If not, there may be something wrong with the cable or the machine.