Monoprice PID 8743 Wireless N ADSL2 Modem and Router 802 11N WPS Function 2T2R 300Mbps - Manual (Page 124)

ADSL2/2+ Router
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2. Click the “Browse” button to select the upgrade file and then
click “Update Software”.
3. After clicking the “Update Software”, it comes to the
upgrade screen. The progress takes about 2 minutes.