Can be raised as an other fault via Eco though normally this is caused by crap filters if you have just moved to DECT phones...
To test this disconnect all your devices and connect directly into the test phone socket with just your live box and your phone... If you get the same problem then swap the filter. If you still get the same issue try another phone....
Tell me what happens after than and i will see if i can help. I cannot woosh test your line as i don't have access to orange assets plus i guess your on an LLU line..
I hope you understand that..... (i work for an ISP)
