| B1 | 3 additional RJ45 adapter sets for four wire ISN ENY41 |
| C3 | Three years of depot calibration coverage based on the R&S recommended calibration interval - includes test data. The first calibration is included with product delivery with 2 additional depot calibrations |
| C5 | Five years of depot calibration coverage based on the R&S recommended calibration interval - includes test data. The first calibration is included with product delivery with 4 additional depot calibrations. |
| DCV-1 | Documentation of calibration values |
| ENY41 | 4-Wire ISN acc. to CISPR 22:2005 (EN 55022:2006) for EMC measurements on unshielded telecommunication ports |
| ENY81 | 8-Wire ISN acc. to CISPR 22:2005 (EN 55022:2006) for EMC measurements on unshielded telecommunication ports |
| ENY81-CA6 | 8-WIRE ISN acc. to CISPR 22:2005 (EN 55022:2006) for EMC measurements on unshielded telecommunication ports |
| ENYBS | ISN functional test set incl. 2 Baluns ENYB21 and one set of ISN test boards |
| FTS | Functional Test Set. LCL probe and adapter set for fuctional testing of ENY21/ENY41/ENY81 Var.03 |
| ITS | Immunity Test Set. Adapter set for immunity testing (for ENY21 and ENY41) |