I didn't test the following.
In OBi#1
Add to the beginning of Voice Services -> ObiTalk Service Service -> InboundCallRoute:
{(200222222)>(200):li(18005551212)},
Replace your Physical Interfaces -> Line Port -> InboundCallRoute:
{(4444444):PP(ob200222222*100)},{ph}
In OBi#2
Add to the beginning of Voice Services -> ObiTalk Service Service -> InboundCallRoute:
{(200111111)>(100):aa},
Replace your Physical Interfaces -> Line Port -> InboundCallRoute:
PP(ob200111111*200)
Update:
I corrected a coding error at 11:23 PM