I currently work at home using a company provided phone in combination with a Plantronics m22 amplifier and a plantronics wired headset. I take a lot of phone calls and for the past few months I can't use my headset basically. I am getting interference whenever speaking into the headset. Without the headset/amp combo it works fine. My theory is that is is related to my desk I am using but I can't be sure. I have swapped out the AAstra phone, the amplifier, the headset, and even the phone cord from the modem, and I still get the interference. I am at wit's end. Some research indicates it is likely RF interference coming from somewhere. I have my own router an ASUS RT-N66U. I have tried moving the phone as far as possible from router/cellphones and anything else I can think of that might broadcast a signal to no avail. It is possible it is still the equipment? Do you guys have any recommendations for what phone/headsets work well with your service? Anything I can purchase that might help? An RF filter?