CommScope airs Cat 8 vs. Cat 7a concerns re: 40G

July 26, 2013
CommScope stirs the pot with its Category 8 Cabling Standards Update.

CommScope has released a PDF white paper document entitled Category 8 Cabling Standards Update, which airs the company's concerns surrounding the TIA TR42.7 Study Group's decision to adopt ISO/IEC Class II cabling performance criteria into its pending ANSI/TIA-568-C.2-1 category 8 project, as recently reported in this space.

"The approval of the new task group to study Class II channels is a recognition of the advances in PIMF cabling technology needed to support the use of balanced twisted copper cabling for 40 G applications," admits CommScope. Provocatively, the company then adds that "this recognition is somewhat tempered by the fact that TIA TR42.7 has to deal with the issue of three different connector types allowed for Class II," while contending that "the decision to develop Class II up to 2000 MHz is a clear indication that Category 7A cabling specified up to 1000 MHz will not be sufficient for 40 G applications."

See: CommScope document questions suitability of Cat 7A cabling for 40GBase-T

More: Siemon responds to CommScope's Category 7A claims

The company warns, "The work in TR42.7 will have to be carefully coordinated with the ongoing work in ISO/IEC/JTC1/SC25/WG3 developing Class II specifications, IEC 46C developing Category 8.2 cable specifications, and IEC 48B developing Category 8.2 component specifications...It is not clear whether TR42.7 will continue to require a single interface allowing portability and interoperability of cabling, LAN, and SAN equipment in data centers that generally use the RJ45 connector as the standard ubiquitous interface for balanced twisted pair cabling."

The white paper goes on to debate key differences between Class I and Class II cabling, and to address the subject of backward compatibility with existing cabling and LAN/SAN equipment among the various Category 7A connector designs proposed for use in Class II channels.

View/Download the white paper.

About the Author

Matt Vincent | Senior Editor

Matt Vincent is a B2B technology journalist, editor and content producer with over 15 years of experience, specializing in the full range of media content production and management, as well as SEO and social media engagement best practices, for both Cabling Installation & Maintenance magazine and its website He currently provides trade show, company, executive and field technology trend coverage for the ICT structured cabling, telecommunications networking, data center, IP physical security, and professional AV vertical market segments. Email: [email protected]

Sponsored Recommendations

imVision® - Industry's Leading Automated Infrastructure Management (AIM) Solution

May 29, 2024
It's hard to manage what you can't see. Read more about how you can get visiability into your connected environment.

Global support of Copper networks

May 29, 2024
CommScope designs, manufactures, installs and supports networks around the world. Take a look at CommScope’s copper operations, the products we support, our manufacturing locations...

Adapt to higher fiber counts

May 29, 2024
Learn more on how new innovations help Data Centers adapt to higher fiber counts.

Going the Distance with Copper

May 29, 2024
CommScopes newest SYSTIMAX 2.0 copper solution is ready to run the distanceand then some.