mike wrote:

I recently switched to a high-power router and Wi-Max wireless internet.
One or both drove my 2.4GHZ wireless phone crazy. Hardly worked at all,
even up close.
I powered up the spectrum analyzer. Yep they were right on top of
one another.
I switched to a DECT phone, which, as I recall, works on different
frequencies.
Problem got a lot better. I still can't stand too close to the router.

There are three kinds of interference that can happen in this case.

The first is direct interference, where your WiFi unit operates on 2.4gHz
and your cordless phone also operates on 2.4gHz. The old 2.4gHz phones
did not listen for activity on a channel before transmitting on it, and
often would wipe out Wifi.

The newer DCT phones listen, but there is only so many channels and eventually
they overlap.

Since 2.4gHz is 1/2 of 5.8 gHz, the second harmonic of WiFi can interfere
directly with 5.8gHz phones and so on.

The second is intermodulation, where two signals combine and the difference
or sum causes interference. Not likey in this case.

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.

That's why you can't talk on the DECT phone near your WiFi device.

It's very likely that the OP is experienceing desensitazation or direct
interfernce.

Another thing they can try is to move the base station. Especially if it
is sitting next to another wireless device.

Geoff.



--
Geoffrey S. Mendelson, N3OWJ/4X1GM/KBUH7245/KBUW5379