| Subject | English | German |
| commun. | Battery feeding Overvoltage protection Ringing Signalling Coding Hybrids Testing | Schleifenstromeinspeisung Überspannungsschutz Rufstromeinspeisung Kennzeichengabe Signalcodierung A/D, D/A conversion Gabelschaltung Leitungsmessung (exchange/telephone interface functions in digital telephone network) |
| commun. | battery testing | Freiprüfen gegen Spannung |
| telecom. | battery testing | Batteriepotentialprüfung |
| ed. | test battery | Testkomplex |
| tech. | test battery | Massbatterie |
| tech. | testing battery | Pruefbatterie |
| tech. | testing battery | Messbatterie |