Patent ID: 8248914

Claim:
A gateway device, comprising: a VoIP (Voice over Internet Protocol) card, a standby VoIP card, and a VoIP control card in communication with the VoIP card and the standby VoIP card, each of the VoIP card and the standby VoIP card comprising a connection status monitoring system; the connection status monitoring system of the VoIP card operable to: monitor a current communication connection status of the VoIP card, and back up connection data of a current communication connection to the VoIP control card; and simulate voice data of the current communication connection status, provide the simulated voice data to the VoIP card, and direct the VoIP card to provide the simulated voice data to the VoIP control card to determine whether the VoIP card has failed to function; the VoIP control card operable to switch control of the current communication connection from the VoIP card to the standby VoIP card, and provide the backup connection data of the current communication connection to the standby VoIP card; the connection status monitoring system of the standby VoIP card operable to rebuild the current communication connection according to the backup connection data.