IEC 61156-5:2009/COR1:2009

IEC 61156-5
(Second edition – 2009)
Multicore and symmetrical pair/quad cables for digital communications – Part 5: Symmetrical pair/quad
cables with transmission characteristics up to 1 000 MHz – Horizontal floor wiring – Sectional

specification
C O R R I G E N D U M 1
6  Characteristics and requirements
6.2  Electrical characteristics and tests
Add the following note:
NOTE  For cat7 , unless the test is performed with very sensitive test equipment, it is recommended to limit the cable length to
A
50 m for a better accuracy in high frequencies.
6.3.6  Far-end crosstalk (FEXT)
Table 7 – Worst-pair PS EL FEXT(1) values
In the PS EL FEXT(1) column for Category 7, instead of:
“92,3”
read :
“91”.
6.3.10  Impedance
Replace the existing text of 6.3.10 by the following. There is no change to Figure 1.
The impedance requirement is specified by either case A or case B below as specified in the
relevant detail specification.

Case A (Fitted or mean characteristic impedance):

The impedance measured in accordance with 6.3.10.2 or 6.3.10.3 of IEC 61156-1 shall be
100 Ω ± 5 Ω at 100 MHz. In this case, the return loss shall also be
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