Edimax Technology EW-7438RPn - Manual (Page 13)

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The quick installation setup is completely done, you can refer to ‘2-2
Repeater mode Advanced Settings’ to login in web UI for other advanced
settings.
NOTE: If the Signal LED is off, it means this place is out of wireless
signal of your wireless broadband router or access point, please
move this repeater closer to broadband router until repeater device
can receive signal from broadband router and extend its signal.