| Subject | English | German |
| commun. | high-speed user information channel | Breitband-Informationskanal (ISDN, H0 = 384 kbit/s, H11 = 1. 536 Mbit/s, H12 = 1.92 Mbit/s, H2 = 30-40 Mbit/s, H4 = 120-140 Mbit/s) |
| commun. | user information channel | Nutzkanal |
| commun. | user information channel connection | Nutzkanalverbindung |
| commun., IT | user-to-user information flow | Datenfluß zwischen Anwendern |