| Subject | English | German |
| opt. | excite atoms from level 1 to level 3 | Atome aus Niveau 1 nach Niveau 3 anregen |
| gen. | level 1 actions | Erststufenmassnahmen |
| gen. | level 1 actions | Handlungen der Stufe 1 |
| gen. | level 1 actions | Erststufenhandlungen |
| commun. | level-1 distributor | Verteiler 1. Ordnung (electronic or active distributor) |
| commun. | level 1 synchronous transport module | synchroner Transportmodul der Ebene 1 (pulse frame, ITU-T (CCITT) Rec. G.70X, equal to STS-3 or OC-3 155.520 Mbit/s; STM-4 = approx. 4f, i.e. 622.080 Mbit/s, STM-16 = 2.488 Gbit/s, s. SDH hierarchy) |
| commun. | level 1 synchronous transport signal | synchrones Transportsignal der Ebene 1 (51.84 Mbit/s, = OC-1, STS-3 = 155.52 Mbit/s = OC-3 and STM-1, q.v.) |
| microel. | level to-level registration tolerance of 0.1 μm | Überdeckungstoleranz von 0,1 μm zwischen den Ebenen |
| commun. | optical channel level 1 | optischer Kanal Ebene 1 (51.84 Mb/s, SONET standard, equal to STS-1; OCS-3 = 155.52 Mbit/s = STS-3, i.e. STM-1) |
| comp., MS | Transmission Level 1 | Übertragungsebene 1 (A U.S. telephone standard for a transmission facility at digital signal level 1 (DS1) with 1.544 megabits per second in North America and 2.048 megabits per second in Europe. The bit rate is the equivalent bandwidth of approximately twenty-four 56-kilobits-per-second lines. A T1 circuit is capable of serving a minimum of 48 modems at 28.8 kilobits per second or 96 modems at 14.4 kilobits per second. T1 circuits are also used for voice telephone connections. A single T1 line carries 24 telephone connections with 24 telephone numbers. When it is used for voice transmission, a T1 connection must be split into 24 separate circuits) |
| gen. | with the scores level at 1 all | beim Gleichstand von 1:1 |