A field service technician is setting up smartphones for remote site inspectors who need to capture data using a specialized external USB Type-A digital sensor. The technician plugs the sensor into the smartphone's USB Type-C port using a passive USB Type-C to USB Type-A adapter. Although the adapter works correctly when connecting storage drives to a laptop, the smartphone fails to detect or power the sensor probe. Which of the following capabilities must be supported by the mobile device for this peripheral to function correctly?
- USB On-The-Go (USB OTG) capability to allow the mobile device to act as a USB host and supply bus power to connected peripherals.Answer
- BThunderbolt 4 protocol controller support on the mobile device to establish PCIe tunnel communication with the external sensor.
- CExchange ActiveSync background service enrollment to authorize hardware data streaming over the mobile physical interface.
- DMobile Application Management (MAM) container enforcement to unlock physical USB connector data pins for unverified accessories.
Answer
The mobile device must support USB On-The-Go (USB OTG) to operate as a host and provide power to the external USB Type-A sensor.
Mobile devices typically operate as peripheral client devices when plugged into PCs. For a smartphone to communicate with and supply power to external accessories (such as keyboards, mice, flash drives, or specialized USB sensors), the mobile device must support USB On-The-Go (USB OTG). This feature enables the mobile device's port controller to function in host mode.
Step-by-Step Solution
Key Concept
USB On-The-Go (USB OTG) Host Mode Requirements