I have an Elastix system with 4 FXO. When I receive a call to the number on the 3rd FXO port I get a weird sound for 10 seconds as soon as you pick it up, and the it goes off and you can talk perfectly. After about 60 seconds it goes on for a couple of seconds and off again. It sounds like the sound modems made when you connected to the internet over dialup. I have tried using fxotune -i 5, and fxotune -s, and the problem remains. Here is a link to a recording I made of it: http://www.ziddu.com/download/6777008/g ... 3.mp3.html Thanks in advance!