If I understand correctly, I think what you mean is that CLIP (CLI Presentation, as in presentation to the network and outside world) is enabled by default. Which means that when I make an outgoing call my number is presented to the person I'm calling (assuming they have a compatible phone and CLI service on their line). If you turn that feature OFF then my line has CLIR on it instead of CLIP. Thats the OUTGOING side.
Further on the OUTGOING side, you can have CLI(P) set to disabled but if you want the recipient to see your CLI, just dial 1470 before their #. However, in this case, CLI revealed or not has no effect on receiving mobiles; they see your CLI anyway.
EDIT: Thanks to Uilebheist
1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 19 Meg WBC
Edited by XRaySpeX (Sun 20-Jan-13 23:19:15)