stanley.siu,
OBi web page:
Setup Wizard>Inbound Settings>ITSP InboundCallRoute
You can setup known remote tel numbers to acess the AA
(5145551111|5145552222):aa},{ph}, <--------------Incoming call go to AA
You can also set up a callback to get you AA. This is a good setup for cell users that have unlimited incoming calls.
{(<**2>(5145553333|5145554444)):aa($1)}, <------------ Callback to AA
You can combine them if you want both (if it makes sense in your call strategy):
(5145551111|5145552222):aa},{ph},{(<**2>(5145553333|5145554444)):aa($1)},
Edit: (Correction)
{(5145551111|5145552222):aa},{(<**2>(5145553333|5145554444)):aa($1)},{ph}