Description of USB
USB interfaces are located on the front panel of the equipment, and all of them are USB3.0 interfaces and adopt standard female Type-A interfaces. The pins of USB interface are defined as shown in the figure below:

| Pin | Definition |
| 1 | VBUS |
| 2 | D- |
| 3 | D+ |
| 4 | GND |
| 5 | SSRX- |
| 6 | SSRX+ |
| 7 | GND |
| 8 | SSTX- |
| 9 | SSTX+ |