Maybee someone can help resolving this: My customer runs tsw (bc13) on the switch, and have an opi II connected. There is a periodic problem, when the operator answer a call (any type) there sometimes is a loud tone (for one second) which both parts can hear, and after this the opi turns into night posision (there is only one operator). I have tried to restart sw units, reinstall etc. I have not replaced the opi yet, cause to long time for delivery. But maybee there is another cause, and maybee some of you have expirienced a problem like this