The GW101 gateway provides two USB HOST interfaces that comply with the USB 2.0 specification. The physical connector is a dual-layer standard USB Type-A receptacle. It can be used to connect USB flash drives, USB cameras, USB speakers, etc. The physical interfaces are shown in the figure below:
The signal definitions are shown in the table:
| Pin Number |
| A1 |
| A2 |
| A3 |
| A4 |
| B1 |
| B2 |
| B3 |
| B4 |