Thanks for the help and threads here, I have this Partially Solved:
Created Mailbox 7899 and Name Tag HG *7899. For Ext 7000, I have Call Route 1st Alt and Call Route 2nd Alt to *7899.
If I call ext 7000, after no answer, the call goes to Mailbox 7899.... Great !
But, if ext 7000 is busy, the Voice mail system answers with "The person at ext 7000 is on the phone...the person at ext 7000 is on the phone", then I get Mailbox 7899 ? Don't know why i'm getting the double message and then transfered.
Thanks for any assistance on this.