| CLIP | Calling Line Identification Presentation (CLIP) allows the subscriber to see the number of person calling on their display, provided the call is coming from a digital network and the caller has not activated CLIR (Calling Line Identification Restriction). |
| CLIR | If Calling Line Identification Restriction (CLIR) has been activated, the caller's number will not be shown on the display of the party called. Generally the display will then show "Unknown Caller." |
