Generally, the cause is isolated by the following procedure:
A possible cause is that the wireless connection is not in an open state. Set the wireless connection to a waiting state in the system menu, and check again.
If there is no problem, isolate the cause by the same procedure in the previous question.
A probable cause is that the "MAC address filtering" is set to the access point or that unique IP addresses are not set.
Pay particular attention to Handy Terminals that have been newly added on or replaced for repair.
Below are some examples of electromagnetic interference:
Be sure to perform a site survey before installing a wireless Handy Terminal.
Check the following: