I think you would like to have calls to your SP1 also ring your cell after 2 rings (about 12 seconds). The first to pick up the call gets it, so suppose after 15 seconds (example), the phone on the OBi is picked up, the cell stops ringing, and the phone gets the call. If the cell answers first, the cell gets the call.
This may or may not work, based on what your SP1 SIP provider provides. If it does not, you could set up a different provider on SP2 and forward out on SP2.
First record your current Voice Service -> SP1 Service -> X_InboundCallRoute
I expect it to have ph in there somewhere. It may be just {ph} or it may be something more complex. If it is not something more complex, you should worry about SIP scanners. Feel free to post your string here but change any phone or account numbers to some sample string, as I have done in my description. In my description, 12025556789 represents your cell number. So in your X_InboundCallRoute replace
ph with
ph,SP1(12025556789;d=12)Keep the curly braces and other numbers etc. If you set things up with OBiTalk, which you probably did, make your changes in the expert mode of OBiTalk.
============notes follow==========
If you had an OBi202, you would be using ph1 or ph2 instead of ph. I think ph1 may be a synonym for ph.
This is my first try at describing this. Here are some threads I referred to in making it:
http://www.obitalk.com/forum/index.php?topic=3040.0http://www.obitalk.com/forum/index.php?topic=4353.0https://www.obitalk.com/forum/index.php?topic=425.20I am sure these are not the best reference threads, but they were what came up in a few searches I made to research this. I remember more recent threads that described this process, but they did not come up in my search attempts.