I have a client with an IPO 406 r4.0.7 & for 4 days now I have been experiencing a strange problem. In some ext when they transfer a call to another ext and they don't complete the transfer, but wait for the other ext to answer first, the caller being transfered hears both music on hold and ringing tone. This happens only to some ext. I cannot find any difference in the settings of these ext which have the problem. All ext in this client are digital. I rebooted the system, but it didn't help. Any ideas? Thanks