On Tue, 07 Jan 2014 08:19:18 +0000, Geoffrey S. Mendelson wrote:

There are three kinds of interference that can happen in this case.
The first is direct interference
The second is intermodulation
The third is desensitization, where a strong signal on a relatively near
frequency overloads the receiver in a device. So a WifI router can cause
DECT phones to stop receiving, even though WiFi is 2.4gHz and DECT is 1.7gHz.

This is very useful information, an applicable to the WiFi group as well.

My DECT Panasonic KX-TG6441 phones & handsets apparently operate at
1.9 GHz, according to page 6 of this PDF:
http://service.us.panasonic.com/OPER...TG6431-MUL.PDF
"The product operates in the frequency range of 1.92 GHz to 1.93 GHz,
and the RF transmission power is 115 mW (max.)"