Figured it out
I created a Star Code of *71 (*72 conflicted with Callecntric)
Then I added this Line *71, Call Forward Unconditional SP4, coll(SP4($cfan)),set(SP4($cfa),1)
This can be enabled from the handset by dialing *71 1-555-555-7777# (Desired number)
The OBi202 will default outbound call to SP1 just like using the aa.
Also It seems the proper format for MT's suggestion is SP1(1800555xxxx) to forward to 1-800-555-xxxx using SP1