Edimax Technology 3G-6200nL - Manual (Page 85)

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After you finish the wireless setting, please click ‘Apply’ button, after
you click ‘Apply’, the following message will be displayed on your web
browser:
TIPS: You can try to change channel number to another one if you
think the data transfer rate is too slow. There could be some other
wireless routers using the same channel, which will disturb the radio
communication between wireless client and the wireless router.