| 摘要 |
An integrated access device, a voice over Internet protocol (VOIP) system and a backup method thereof. The VOIP system includes a first remote server, a second remote server and an integrated access device. The integrated access device includes a first Internet protocol interface, a second Internet protocol interface, a memory unit and a processing unit. A first network connection is built between the first Internet protocol interface and the first remote server, and a second network connection is built between the second Internet protocol interface and the second remote server. The memory unit is for storing a program, and the processing unit executes the program to judge whether a voice packet in the integrated access device can be transmitted through the first network connection or not. When the voice packet cannot be transmitted through the first network connection, the voice packet will be timely transmitted through the second network connection.
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