Router equipment and signal connection method

The invention relates to router equipment, and the equipment comprises a core board CPU module and a power supply module for supplying power to the core board CPU module, wherein the core board CPU module is respectively in bidirectional connection with the hardware watchdog module and the communication module, and the power supply module is in bidirectional connection with the hardware watchdog module; the communication module comprises a first 4G unit and a second 4G unit, the first 4G unit is connected with the multi-SIM card unit, and the second 4G unit is connected with the single-SIM card unit; the core board CPU module is used for providing a dog feeding action for the hardware watchdog module, the hardware watchdog module is used for enabling the power supply module to be powered off and restarted, and the first 4G unit is used for switching signal connection cards in the multi-SIM card unit when signals are abnormal. The invention relates to a signal connection method which can effectively guarantee