Sorry for sending bugs to forum, but nobody reply on my emails to email@example.com. When you calling to extension and on extension we have settings "redirect to Voice mail after 15 sec timeout", then system do not reject call to extension. After 15 seconds first caller already record message to Voice Mail, but other side phone still ring. And if you'll try to pick up the phone, you'll hear silence. I have experiment with Nokia E60. This phone still ring and if I answer on call, then I listen silence and after few seconds see message "Call duration 00:00". Solution: Please reject call for otherside extension, if call already redirected to Voice Mailbox. Thanks.