Patent ID: 8850096

Claim:
A method for using a wireless data card individually to access a network, comprising: when a wireless access terminal detects that the wireless data card is connected with a terminal through a universal serial bus (USB) cable, switching a power line and a data line of the wireless data card to connect the power line and the data line of the wireless data card respectively to a data line and a power line of an external USB interface on the wireless data card; wherein, the wireless access terminal is configured with a data line switching module; the data line switching module is configured with three ports and one switch to enable switching; wherein, a first port connects a data line of a central processing unit (CPU) within the wireless access terminal; a second port connects the data line of the wireless data card, a third port connects the data line of the external USB interface, and the switch to enable switching connects the power line of the external USB interface; the method further comprises: when there is no electricity in the power line of the external USB interface, the switch to enable switching conducting the first port and the second port; and the step of the wireless access terminal switching the data line of the wireless data card to connect the data line of the wireless data card to the data line of the external USB interface on the wireless data card comprises: the switch to enable switching, when there is electricity in the power line of the external USB interface, disconnecting connection between the first port and the second port, and conducting the second port and the third port; or, the wireless access terminal is configured with a power line switching module; the power line switching module is configured with three interfaces, one power control unit and one single-pole double throw switch; wherein, a first interface connects the power interface of the wireless access terminal; a second interface connects the power line of the external USB interface, a third interface connects the power line of the wireless data card, and a first connection end of the single-pole double throw switch connects the third interface; the method further comprises: when it is not detected that the wireless data card establishes connection with the terminal through the USB cable, the power control unit controlling a second connection end of the single-pole double throw switch to connect the first interface; and the step of the wireless access terminal switching the power line of the wireless data card to connect the power line of the wireless data card to the power line of the external USB interface on the wireless data card comprises: when it is detected that the wireless data card establishes connection with the terminal through the USB cable, the power control unit controlling the second connection end of the single-pole double throw switch to connect the second interface.