How do I change wiring in a telephone jack for line 1 and 2?
This is not standard wiring for phone lines with 4 twisted pairs or what is called cat5 or cat5e Usually: line 1 is blue/blue-white line 2 is orange/orange-white line 3 is green/green-white line 4 is brown/brown white on a standard 2 line plate/plug you have 4 colors (some new plates don’t have colored wires but they have small letters representing these colors) line 1 is red (connected to blue) and Green (connected to blue-white) line 2 is yellow (connected to orange) and Black (connected to orange-white) So the wiring you described looks like they used orange for line 1 and green for line 2. Swapping solid for solid and stripe for stripe should work. Sometimes if a pair of wires goes bad a phone guy will use another pair hence the wrong colors being used. I have seen the phone company reverse colors just to mess with outside contractors and other contractors trying to corner customers.
