Edimax 3G-6200nL V2 User Manual page 25

Note 2: A 3G/3.75G connection and an xDSL/cable connection cannot be used at
the same time. When both types are connected to the router, the router will
prioritize the 3G/3.75G connection and will only switch to the xDSL/cable
connection when the 3G/3.75G signal is weak.
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