I have CCM 4.1.3.
I have a share line on 2 phones and I want that the phone #2 can not pick up the line when it rings. I just want the line appearance.
This is not possible in CCM 4.1(3). With the new 6.x and 7.x releases you can use BLF (Busy Lamp Field) to monitor the "Line in Use" type scenario, but in the earleir versions the best you can do is to disable the Ringer on the Shared Line for Phone #2.
Hope this helps!