[Hilo] what is the 5V-Connection (VUSB) at Hilo3G?

[Hilo] what is the 5V-Connection (VUSB) at Hilo3G? Is it activating the USB-interface? Or does the 5V-Connection (VUSB) supply the module with power?

Answer: Our USB interface follows the USB standard.
VUSB is used as a signal to know if someone is connected. For the Hilo3G, VUSB is not a power supply.