Standard practice


The new international standards for Category 8 copper cable and balanced cabling systems for 40Gb/s are currently being developed as draft standards IEC 46C/976/NP and ISO/IEC TR 11801-99-1. Unlike the proposed standards for symmetrical Category 8 data cables discussed just a few years ago – at that time for structured premises cabling and with a maximum limiting frequency of 1.2 gigahertz (GHz) – the sole use foreseen by today‘s international standardisation bodies is in data centres with a maximum limiting frequency of 2GHz.

Standard ISO/IEC TR 11801-99-1 defines a point-to-point connection between active devices at a maximum distance of 30m, comprising 26m of installation cable and 2m of patch cable on either side. Such a connection can replace expensive fibre optic and twinax cabling in data centres.

Although the new standards are still at the draft stage, Datwyler has already developed CU 8203 4P, a first compact S/FTP AWG23 cable which complies fully with the anticipated requirements of the new Category 8.2 as specified in the ISO/IEC Draft. Other new developments with S/FTP and F/FTP as well as the appropriate patch cables (flex cable) will follow. Datwyler lays particular emphasis on the fact that with regard to attenuation (NEXT, PS-NEXT) the new cables provide a large amount of spare capacity at the limit values discussed and defined.

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