D-Link DWR-720P User Manual page 46

Q. Poor sound quality, echo or noise makes communication difficult.
A. Hang-up your phone and dial again. The Network may connect the phone to a line with better communication
quality. If the problem persists, please contact you Network Provider.
Q. "Not in service area. Network failure." is displayed.
A. Check the signal indicator. If there is no signal, you may be in the basement or network blind area in a building.
Please move to other locations to receive signal. Or potentially you are not in a coverage area. If so, please contact
your Network Provider for assistance.
Q. Standby time declines.
A. Signal at your location is weak so that the phone has to search signal for a long time. When you don't want to
answer any calls, please power off for a time being. It is also possible that the battery has been used for a long time
and approaches its life-span. In this case, please replace the battery.
Q. Phone fails to boot.
A. Your battery is potentially not charged. Please charge your phone until the battery power is restored, then try to
power on again.
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