See the following thread for some AA basics:
http://www.obitalk.com/forum/index.php?topic=10297.0Create a custom greeting something like: "Press 1 to complete your call"
If you place the custom greeting "%user1" in the Menu option, it will repeat when user doesn't respond.
If you place the custom greeting in Welcome option, it will only play once.
Delete all other greetings.
Change the AA DigitMap to: (0)
Change the AA OutboundCallRoute to: {0:ph}
When the caller enters 1, the OBi passes a zero to the DigitMap.
There is only one AA on the OBi202, so you can only have one message. Maybe there is this option in OBiExtras. I never looked at OBiExtras.
There is also a problem with routing. I assume you want SP1 routed to PH1 and SP2 routed to PH2. I never did this before, but I have an idea how to accomplish it. I would have to test it.
Other things you can do:
You can use a callerid white list for family/friends to bypass the AA.
You can use a black list to block calls without the AA.
You can use NoMoRobo to block robo calls, but it won't work in combination with the AA.
http://www.obitalk.com/forum/index.php?topic=8802.0See reply#27 in the same thread for valid tollfree providers.