Abstract: A network switch includes a plurality of ports for communicating over a network. Processing circuitry processes inbound frames received from the network via the ports and sends outbound frames to the network. Remote management circuitry (RMU) is responsive to commands received from a host device external to the network switch. The RMU receives via one of the ports a remote access request frame from the host device, wherein at least part of the remote access request frame is encrypted, and decrypts the remote access request frame. In response to successful decryption of the part of the remote access request frame, the RMU accesses one or more configuration registers of the network switch in accordance with the remote access request frame, composes a remote access response frame, at least a portion of the remote access response frame being encrypted, and sends the remote access response frame to the host device.

Abstract: A first serial management interface device includes one or more input/output pins and a controller coupled to the one or more input/output pins. The controller receives a first frame from a second serial management interface device via a first input/output pin and generates a first error code based on the first frame received from the second serial management interface device. The controller receives a second frame from the second serial management interface device via a second input/output pin subsequent to receiving the first frame. The second frame includes a second error code. The controller compares the first error code to the second error code to determine whether first error code and the second error code match.

Abstract: A device for monitoring temperature response to stress change in strata, includes: a stress or strain sensor, disposed at the bottom of a borehole in the strata, encapsulated with expansive cement, and detecting a stress change in the strata; a temperature response amplifying unit, disposed in the borehole and above the sensor, encapsulated with expansive cement, and configured to detect a temperature variation caused by the stress change and to amplify said temperature variation; a power controlling and data collecting module disposed outside the borehole and configured to supply power to the sensor and the temperature response amplifying unit and to collect the stress change and the amplified temperature variation. Silicone or rubber is used to encapsulate the temperature sensors, by which the temperature response to stress change in strata is amplified effectively.

Abstract: A device for monitoring temperature response to stress change in strata, includes: a stress or strain sensor, disposed at the bottom of a borehole in the strata, encapsulated with expansive cement, and detecting a stress change in the strata; a temperature response amplifying unit, disposed in the borehole and above the sensor, encapsulated with expansive cement, and configured to detect a temperature variation caused by the stress change and to amplify said temperature variation; a power controlling and data collecting module disposed outside the borehole and configured to supply power to the sensor and the temperature response amplifying unit and to collect the stress change and the amplified temperature variation. Silicone or rubber is used to encapsulate the temperature sensors, by which the temperature response to stress change in strata is amplified effectively.