NETWORK DEVICE AND COMMUNICATION RECOVERY METHOD THEREOF

摘要

A network device ( 20 ) includes more than an active card ( 201 ) and a standby card ( 200 ). The active card is used for establishing telephony connection between a first terminal device ( 10 ) and a second terminal device ( 20 ) via a media gateway control device, and sending communication data between the first terminal device and the media gateway control device. The standby card is used for reestablishing telephony connection between the first terminal device and the second terminal device via a redundancy command and a number of connections of the active card in response to a fault on the active card.