I have a Mitel 5000 series phone system here. It has some older version 3 software on it, that's all I know. Some users have calls forwarded to their cell phones when they are out. They complain that after about 3 minutes on a forwarded call, my reception phone will ring, and the receptionist will pickup, right in the middle of their call! Happens all the time, right after about 3 minutes. Any ideas?? Thanks.