Have 3 Vodavi STS's w/ flash V-Mail all opperate normally for weeks then suddenly start interrupting callers about 10-20 seconds into leaving message w/ "If you are Satisfied...." The only way I can repeat this is by dialing "#" to finish my message. If there is silence I get "Yiur message has been delivered." When this occurs no message is left in the mailbox. If I have 3 of these maybe this has happened to someone else.