PARAMETERS OF MUTUAL EFFECTS OF LAN-CABLES IN A WIDE RANGE OF FREQUENCIES
The results of experimental studies of the parameters of mutual influence of four- and multi-pair LAN-cables of category 5e in the frequency range up to 100 MHz are presented. It is shown that in four-pair cables the crosstalk attenuation norms at the near and far ends are fulfilled with a margin of 5-10 dB. In multi-pair cables, the norms for these parameters are fulfilled, but with a small margin. It has been established that in multi-pair cables the specified parameters due to mechanical influences are influenced by the peculiarities of the technology of twisting the core from four-pair beams on a twisting machine. Recommendations are given for minimizing mechanical stress on the cable core during production.