In OBi100-1:
Change Voice Services -> OBiTalk Service -> InboundCallRoute to:
{>(1xxxxxxxxxx):sp1},{ph}
In OBi100-2:
Change Voice Services -> OBiTalk Service -> DigitMap to:
(<ob>222222222|obxxxxxxxxx|<1*:ob200111111*>1xxxxxxxxxx)
ob200111111 is the OBi number of the OBi100-1.
Add to the beginning of the Physical Interfaces -> Phone Port DigitMap:
1*1xxxxxxxxxx|
It should look like this:
(1*1xxxxxxxxxx|........Current Rules........)
Add to the beginning of the Physical Interfaces -> Phone Port OutboundCallRoute:
{(Mpp):pp},
Dial 1*18005551212