Low link quality or range can be caused by environmental interference, such as lead-based paint and concrete walls. Try to move the antenna of the Wireless MAXg Range Extender or to reposition the wireless clients to improve the link quality.
Some electronic items, such as 2.4GHz phones, may interfere with the wireless signal and affect your wireless range and link quality. Try creating a wireless connection on a different channel. Refer to the Wireless chapter in the Web User Interface section of this guide for more information regarding changing your wireless settings.