What, exactly, in detail, are you trying to accomplish?
The OBi 202 supports TWO physical telephone lines, not four. You use the OBiTALK portal to point your four logical SPn slots to either of those two line ports, L1 or L2.
L1 is electrically wired as a two-line, RJ-14 jack, whereby line 1 is on the center two pins, and line 2 is on the outer two pins. Typically, this is used with a four-wire telephone cord, to connect to a two-line telephone that also has a RJ-14 jack.
L2 is electrically wired as a one-line, RJ-11 jack, whereby line 2 is on the center two pins, and the outer two pins are not connected to anything. Typically, this is used when you want to connect separate telephones; one telephone to L1 and the other telephone to L2.