| Subject | English | German |
| commun. | change-back | Rückschaltung (multi-service) |
| commun. | change-back after swap | Rückschaltebetrieb (ISDN) |
| commun. | change-back from standby | Rückschaltebetrieb |
| commun. | change-back of traffic | Lastrückschaltung (after link restoration) |