Perhaps you're unclear on how the OBi 202 works, from a physical telephone line standpoint.
Both the OBi 200 and the 202 support up to four different SIP service provider registrations in firmware; SP1 -- SP4. You define which telephone service providers are being used by each SPx.
This is separate from the physical routing of the analog telephone signals to the phone jack(s).The OBi 200 has only one physical telephone line interface (the RJ-11 phone jack on the back). The OBi 202 has two separate phone line interfaces (Phone 1 and Phone 2). It is up to you, to configure the OBi 202 to use those two jacks (they are firmware-controlled, not simply fixed-function). See the screenshot attached.
You don't need to use OBi Expert to do that. The phone line settings are on the basic configuration page for each SP. Add or remove check marks to determine the behavior of those two jacks. See the screenshot attached.
Next, understand how those jacks are electrically-wired:
- The Phone 1 jack is a four-conductor, RJ-14 jack. The center two pins are line 1. The outer two pins are line 2. This is designed to be used with a two-line telephone that also has a RJ-14 jack. That jack connects both physical lines to a two-line telephone via one four-conductor telephone cord.
- The Phone 2 jack is a two-conductor, RJ-11 jack. Its center two pins are connected to line 2. It is designed for use with two separate one-line telephones, whereby you'd plug the Phone 1 cord into one telephone, and the phone 2 cord into the other telephone. Optionally, some two-line telephones have two jacks, one for each line. You'd plug two cords between the respective jacks on the OBi 202 and the phone.
So, you have two tasks to get right: define which phone line signals route to which jacks, and wire them correctly to your telephone(s).
None of this is influenced by your separate OBi 200 device. It doesn't matter if that device is on or off, connected or not connected. The 202 is a separate device with a separate configuration.