Siemon predicts confusion at new TIA cable name
TIA has called the next generation balanced twisted-pair cabling system category 8
Industry specialist Siemon has published a summary of the TIA's recent decision to adopt ‘category 8' as the name for the next generation balanced twisted-pair cabling system currently under development, in its Standards Informant Blog, and predicts confusion with the ISO/IEC's naming convention.
As the Standards Informant explains, the TIA TR-42.7 Copper Cabling Subcommittee has adopted ‘category 8' as the name for the cabling system planned to support 40Gb/s transmission in a 2-connector channel over a distance shorter than 100 metres and tentatively describes transmission performance up to 2 GHz.
"We always aim to share our industry expertise and knowledge to support those in the industry to fully understand the technical landscape, the latest innovations and the standards that underpin our market. The Standards Informant demystifies the various cabling standards applied around the globe and gives an unbiased account of the latest standards activity. It is written by those sitting on the Standards committees and is a reliable and rapid information source, delivered in a straightforward style that is easy to assimilate," said managing director of Siemon EMEA, Steven Foster.
Traditionally, cabling categories are supersets of each other - meaning that a higher category of cabling meets or exceeds all of the electrical and mechanical requirements of a lower category of cabling and is also backwards compatible with the lower performing category. However, category 8 is expected to have a different deployed channel topology says Siemon's Standards Informant and will not be a performance superset of category 7A.
Furthermore, whilst ISO/IEC category 7A is currently specified to a bandwidth of 1 GHz, the nearly finalised IEC 61076-3-104, 3rd edition standard for category 7A connectors, is extending category 7A performance characterisation out to 2 GHz. This could mean two cabling specifications specified to 2GHz says the Standards Informant, with the TIA's category 8 having much lower performance than ISO/IEC's category 7A.
The Standards Informant from Siemon is a guide to network cabling and data centre standards and includes sections for ISO/IEC, TIA and IEEE, allowing readers to hone in on the specific standard of most interest or to compare data from each for an industry-wide perspective. It publishes the latest standards news, white papers and technical reports, plus also provides an ‘ask Siemon' facility for visitors to the blog site who seek specific information or guidance.