Abstract: In a spectrum query method for automatic frequency coordination protocol applied to an automatic frequency coordination protocol device, an automatic frequency coordination server is inquired for information of adjacent automatic frequency coordination devices corresponding to the automatic frequency coordination device, and an adjacent device list corresponding to the automatic frequency coordination device is obtained; spectrum information of the adjacent automatic frequency coordination devices in the adjacent device list is obtained, and whether to inquire from the automatic frequency coordination server and update the spectrum information of the automatic frequency coordination devices is determined according to the spectrum information.

Abstract: An optical element driving mechanism is provided and includes a fixed assembly, a movable assembly, a driving assembly and a stopping assembly. The fixed assembly has a main axis. The movable assembly is configured to connect an optical element, and the movable assembly is movable relative to the fixed assembly. The driving assembly is configured to drive the movable assembly to move relative to the fixed assembly. The stopping assembly is configured to limit the movement of the movable assembly relative to the fixed assembly within a range of motion.

Abstract: A data exchange device that identifies VoIP traffic flow. When a type of data flow is received by the data exchange device, the data exchange device determines whether the type of data flow is bidirectional traffic flow. If the type of data flow is bidirectional traffic flow, the data exchange calculates a first data size of downstream data of the type of data flow and a second data size of upstream data of the type of data flow. Then, the data exchange device identifies whether the type of data flow is the VoIP traffic flow according to the first data size and the second data size. If the type of data flow is the VoIP traffic flow, the type of data flow is processed according to a high priority.

Abstract: A modem capable of distributing IPv6 addresses upon request is connected to a user terminal. The user terminal requests and receives multiple IPv6 addresses from the modem, the IPv6 addresses including quality of service values corresponding to different priorities. The user terminal determines a range of quality of service required according to a priority of the message to be sent, and selects an IPv6 address with a quality of service value belonging to the determined range to send the message.

Abstract: A data exchange device that identifies VoIP traffic flow. When a type of data flow is received by the data exchange device, the data exchange device determines whether the type of data flow is bidirectional traffic flow. If the type of data flow is bidirectional traffic flow, the data exchange calculates a first data size of downstream data of the type of data flow and a second data size of upstream data of the type of data flow. Then, the data exchange device identifies whether the type of data flow is the VoIP traffic flow according to the first data size and the second data size. If the type of data flow is the VoIP traffic flow, the type of data flow is processed according to a high priority.