I have searched and have not found a way to get this to work. Using obi202. SP1 is google voice, SP2 is PhonePower, SP3 is google voice, SP4 is google voice. Using a 2 line ATT phone I am trying to have Phonepower roll over calls if already on the line to telephone line 2. SP1 and SP2 ring line 1 and SP3 and SP4 ring line 2. Can anyone help with the obi expert configuration?