| Subject | English | German |
| commun. | call waiting | wartende Belegung |
| commun. | call waiting | Dienstmerkmal Anklopfen |
| comp., MS | call waiting | Anklopffunktion, Anruf wartet, anklopfen (A service that notifies a user that a call is coming in while the user is in a call) |
| commun., IT | call waiting indication | Anrufwarteanzeige |
| gen. | calls waiting lamp | Anrufkontrollampe |
| commun., IT | intercontinental call waiting | Interkontinentalanruf wartet |
| commun., IT | intercontinental call waiting | Anruf aus Übersee wartet |
| commun., IT | international call waiting | Fernanruf wartet |
| gen. | wait call | Warteaufruf |