Tenda AC1750 User Manual page 17

Wireless AC1750 Dual-band Gigabit Router
B. If "Disconnected" (or "Not connected") and no WAN IP
address are displayed (as seen below), connection between
the Internet-enabled modem (or broadband service) and your
device may have failed. Please double check or re-connect all
involved devices and cables properly and then refresh the
page. If nothing is wrong, "Connecting" or "Connected" will be
displayed.
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