| Subject | English | German |
| commun. | duplex channel method | Gleichlageverfahren (ISDN B channel transmission method with echo cancellation, signals transmitted at the same time and frequency) |
| comp. | duplex method | Gegenschreibverfahren |
| cultur., commun. | duplex method | Duplex-Methode |
| comp. | duplex method | Duplexverfahren |