Abstract: A dual-processor electronic device is provided. The dual-processor electronic device includes a first processor, a second processor and a dynamic random access memory. The first processor sends a wake-up command to the second processor to wake up the second processor after performing local initialization. The second processor wakes up, then performs local initialization, copies and decompresses the image file to the dynamic random access memory and sends a ready message to the first processor after the image file is decompressed. The first processor delays startup, and starts the startup process according to the decompressed image file when the ready message is received and the delay-start time is expired. The present disclosure also provides a method for booting up dual-processor electronic device quickly.

Abstract: A dual-processor electronic device is provided. The dual-processor electronic device includes a first processor, a second processor and a dynamic random access memory. The first processor sends a wake-up command to the second processor to wake up the second processor after performing local initialization. The second processor wakes up, then performs local initialization, copies and decompresses the image file to the dynamic random access memory and sends a ready message to the first processor after the image file is decompressed. The first processor delays startup, and starts the startup process according to the decompressed image file when the ready message is received and the delay-start time is expired. The present disclosure also provides a method for booting up dual-processor electronic device quickly.

Abstract: An embedded network device includes a memory, a NOR flash, a first part and a second part of old firmware. The NOR flash includes a first image sector which stores the first part of the old firmware, a second image sector which stores the second part of the old firmware, and a third image sector for backup the old firmware. The embedded network device obtains a first part and a second part of new firmware and store the new firmware in the memory, reads the first part of the old firmware from the first image sector and writes to the third image sector, reads the first part of the new firmware form the memory and writes to the first image sector, reads the second part of the new firmware from the memory and writes to the third image sector.

Abstract: An embedded network device includes a memory, a NOR flash, a first part and a second part of old firmware. The NOR flash includes a first image sector which stores the first part of the old firmware, a second image sector which stores the second part of the old firmware, and a third image sector for backup the old firmware. The embedded network device obtains a first part and a second part of new firmware and store the new firmware in the memory, reads the first part of the old firmware from the first image sector and writes to the third image sector, reads the first part of the new firmware form the memory and writes to the first image sector, reads the second part of the new firmware from the memory and writes to the third image sector.

Abstract: An embedded device (10) includes an image module (11) and an image invoking module (13). The image module for storing all working images of an operating system of the embedded device includes an image sharing sub-module (110), an application image sub-module (111), and an application image backup sub-module (112). The image sharing sub-module is used for storing a kernel image, a library image, and a driver image. The application image sub-module is used for storing a user application image. The application image backup sub-module is used for backing up the user application image. The image invoking module is used for invoking and running the kernel images, the library image, and the driver image.

Abstract: A network device (20) for connecting an Ethernet terminal device (10) to a communication network (30) includes a database (23), a first transceiving module (21), a second transceiving module (26), and a destination address determining module (25). The database is used for saving a reference address. The first transceiving module is connected to the Ethernet terminal device. The second transceiving module is connected to the communication network, and is used for receiving a packet sent by the communication network and forwarding the packet. The destination address determining module is used for determining whether a destination address of the packet matches with the reference address saved in the database. If the destination address of the packet matches with the reference address saved in the database, the first transceiving module sends the packet to the Ethernet terminal device.

Abstract: A voice over Internet protocol (VoIP) modem (100) includes a service determination module (111), a circuit determination module (112), a line determination module (113), and a command determination module (115). The service determination module determines whether asymmetric digital subscriber line (ADSL) service is available. The circuit determination module determines whether a subscriber line interface circuit (SLIC) chip is normal. The line determination module determines whether a public switched telephone network (PSTN) line is idle. The command determination module determines whether a media gateway control protocol (MGCP) command is successfully exchanged. If ADSL service is available, the SLIC chip is normal, the PSTN line is idle, and the MGCP command is successfully exchanged, the VoIP modem determines that VoIP service is available. A method for detecting whether VoIP service is available is also provided.

Abstract: A method for detecting a status regarding provision or otherwise of a public switched telephone network (PSTN) service to a voice over Internet protocol (VoIP) apparatus includes the steps of: providing a dummy load circuit and an off-hook detection circuit; entering a PSTN mode; coupling the dummy load circuit to a PSTN to simulate an off-hook status of a telephone set; detecting whether there is a dial tone from the PSTN by the off-hook detection circuit; and determining whether the PSTN service is provided to the VoIP apparatus according to a detection or otherwise of a dial tone from the PSTN. A VoIP apparatus employing the method is also provided.