Jim,
Thanks so much for the links. I see from them that it has been a problem for some time for others and applies to both 'call forwarding' and 'do not disturb'. I was trying to avoid the callers id from being passed through and whether i did it from Google voice by setting under calls, the box to use my voice number or by using OBI's call forwarding to do it i noticed i lost all ability to contact AA with any of my trusted caller phones and of course my own cell.
Thanks for taking the time to assemble the info links,
Joseph