Smokey1081, The following is how I configured my OBi202 to
call forward calls to phone 2 when phone 1 is busy and I receive a second call.
OBi202 Configuration via OBi Dashboard "Expert" mode.
Set the two following settings:
Voice Services > SP1 Services > Calling Features >
CallForwardOnBusyEnable [Checked]*
CallForwardOnBusyNumber ph2(#)
*Un-Check: OBiTALK Settings and Device Default first.
Repeat for SP2, SP3 and SP4 if needed.