I tried to help you in the past, but we just got wrapped around the axle, because a)you don't sufficiently understand what you are trying to do, and so b)you make more messes with each change, and c)you aren't comprehending what we've already told you. You keep coming back with house wiring questions that are never going to be resolved unless you can follow instructions.
I am pretty sure I already explained that alarm panels use a special female telephone jack, known as a RJ-31X exclusion jack. This special jack is designed to be at the head of the line (the telephone service is connected first to this jack). It then routes the phone line circuit into the alarm panel, where a relay will disconnect the downstream house telephones from the circuit, to "seize" the line and prevent someone taking the phone off the hook from interrupting the alarm call to the central station. The wiring then loops out of the panel, back to the jack, where it is then connected to the downstream house phone wiring.
For example, see:
https://help.livewatch.com/hc/en-us/articles/225669707-RJ31X-jack-wiring-diagram-for-line-seizureIt is pretty unlikely that you can look at your house wiring and figure this out yourself.
I told you previously that you cannot use Google Voice for regular telephone calls on an OBi, with the alarm system mode check-marked. It's all or nothing: either use that SPx for alarm communications,
OR use it for regular telephone calling, but not both. Check-marking the alarm system box on OBiTALK will kill the ability for touch tones on the phone's keypad being recognized.
Bottom line: you need to decide.
- Use Google Voice on your OBi as a dedicated alarm center communicator, or
- Use Google Voice on your OBi to make and receive phone calls,
- but not both.
Because alarm panel communications over VoIP are not highly reliable, most alarm companies have now moved to using a 3G/4G mobile data radio for alarm panel<-->central station communications. In some cases, e.g. ADT, a dedicated internet gateway appliance (ADT Pulse gateway) is used as the primary communicator, with the cellular radio being the backup. Monitoring via telephone dial-up is outdated.