Searching for bases

[c.ponce]

Dear.
We bought a month ago , 4 units W52P with 12 hanset, at the beguin had to much troubles with our lan , then decided separated to a different lan , but we have the same problem , the hanset shows the next message occasionally "Searching for base" , each W52P is conect to a UPS thereby never turn off . then hanset is 20 mtrs max of the bases , is not possible that the signal is lost in this distance , because your datasheet says : in indoor maximun 50 mtrs , outdoors 300 mtrs.
We have seven Acces point , working in different channels, keeping 2 channels of distance
among themselves, also we have four ip cameras working in the channel 3 .

will these devices are interfering with the bases?


Regards.