Huawei B315 Series, Quick Start Manual, Page: 10 / 22

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3. Accessing the Internet through an Ethernet port

Turn off the router and unplug the power adapter before installing any
external antennas.

External antennas are only suitable for indoor use. Do not use external
antennas during thunderstorms.

Only use external antennas provided by your network service provider.

The peak gain of the external antennas is
3
dBi.