User Settings -> User Defined Digit Maps -> User Defined Digit Map2
Label: fwd
DigitMap: (18005551212|1805551313|18005551414)
Assuming GV is defined on SP1
Voice Services -> SP1 Services -> X_InboundCallRoute:
{(Mfwd):li(,,,,,,,,,,1234567),ph},{ph}
Setup a user digit map with the phone numbers you want to forward. The 1st rule in the inbound route will simultaneously ring the OBi110 and call your number via Line port for the numbers in the user digit map. The commas are pauses. Change 1234567 to the number you want to call. I don't remember the length of each pause, but it's not long. Maybe a few seconds, so you will have to play to get this to work the way you want. I don't know if there is a limit on the number of pause you can use. I only used this method to call an IVR then pause and enter a response. See:
http://www.obitalk.com/forum/index.php?topic=10186.0Anybody reading this thread, the pauses will only work on the Line port.
Edit:
I don't know what I was thinking. You don't have a lot of time for this process. GV voicemail picks up after 25 seconds, so you have about 24 seconds for your OBi to ring a few times, a few seconds for the call to your cell to connect and time for you to answer the call.
Each ring takes 6 seconds (2 seconds ring and 4 silence), so three rings on your OBi will take 14 to 18 seconds.
12 seconds pause while OBi is ringing.
Est. 4 seconds to connect to cell (OBi is still ringing) .
That leaves 8 seconds for you to answer the call on your cell.
If you don't answer in time, you won't know who called. You will see your PSTN callerid.