Optimization and Speed: Two Critical Standards Enabling ... Update... · Optimization and Speed:...
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Optimization and Speed: Two Critical Standards Enabling Next Generation
Networks
Stephanie Montgomery, TIA Brett Lane, Panduit
Structure of TIA Standards
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A family of Standards • ANSI/TIA-942-A Telecommunications Infrastructure
Standard for Data Centers (US, publish in Aug 2012) • ISO/IEC 24764 Information Technology – Generic
Cabling for Data Centre Premises (2010, international). Addendum 1 published in 2012
• ANSI/BICSI-002 Data Center Design and Implementation Best Practices (2011, international)
• 2011 ASHRAE Environmental Guidelines for Datacom Equipment
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ISO/IEC Standards Structure
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TIA-942
• ANSI/TIA-942 was the first standard developed by an accredited standards organization that specifically addressed physical data center infrastructure
• Beyond Telecomm encompassing facility needs
TIA-942
• Specifications for data center telecommunications pathways and spaces
• Recommendations on media and distance restrictions for applications over structured cabling system
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TIA-942 Addendum 1 • ANSI/TIA-942 Addendum 1 - Data Center Coaxial
Cabling Specifications and Application Distances (March 2008)
• Additional requirements for 75 ohm coaxial cable connectors and testing of coaxial cabling used for T-3, E-1, and E-3 circuits
• Permits longer horizontal cabling distances originating from the MDA for coaxial cabling
• Amended maximum circuit distances for E-1, T-1, E-3, and T-3 circuits in data centers
TIA-942 Addendum 2 • ANSI/TIA-942 Addendum 2 - Additional Guidelines for Data
Centers (Published February 2010) • Harmonized with 2008 ASHRAE Environmental Guidelines for
Datacom Equipment – Expanding the Recommended Environmental Envelope, to reduce energy consumption in data centers
• Added three-tier lighting scheme to reduce energy consumption
• Changed recommended horizontal and backbone cabling type for balanced twisted pair from Category 6 and Category 6A to Category 6A only
• Recommendation that data centers should be a MICE M1I1C1E1 environment
TIA-942-A
• ANSI/TIA-942 Revision A (Published Aug 2012)
• Major modification to TIA-942 to incorporate new technologies and data center practices
TIA-942-A Revisions – Reorg
• Harmonized with the TIA-568-C series including the topology, terms, and environmental classifications
• Moved grounding & bonding content to ANSI/TIA-607-B • Moved administration and labeling content to ANSI/TIA-606-B • Most content regarding cabinets/racks and
power/telecommunications separation moved to ANSI/TIA-569-C
• Outside plant pathways content moved to ANSI/TIA-758-B
TIA-942-A Revisions - Cabling
• Removed 100 meter length limitation for optical fiber horizontal cabling. Horizontal cabling distances for optical fiber are based on individual application requirements
• Only category 6 or category 6A, with cat 6A recommended
• Recognized multimode optical fiber cable for horizontal and backbone cabling
• Recognized optical fiber connectors are LC for one or
two fibers and MPO for more than two optical fibers.
TIA-942-A Revisions - Other • Intermediate Distribution Area (IDA) added to the
data center topology to support larger data centers
• Allowances for active components in the Zone Distribution Area (ZD) were removed
• Added recommendations for energy efficiency • Harmonized some terms with ISO/IEC 24764 data
center standard
TIA-942-A Addendum 1
• ANSI/TIA-942-A-1, Published March 2013 • Provided examples of data center fabric
topologies, a new switch topology that replaced the classical 3-tier architecture used in data centers
• Data center fabric topologies covered include fat-tree, full-mesh, inter-connected meshes, centralized switch, virtual switch
Traditional switch architecture
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Full-Mesh
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Fat-Tree
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Fat-Tree with Port Extenders
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TIA-942 Revision B
• Adds MPO-16 and MPO-32 connectors (for 200G and 400G) • Adds category 8 as an allowed cable type. • Changes recommendation for category 6A balanced
twisted pair cable to category 6A or higher • Adds wideband multimode fiber (WBMMF) as recognized
cable type • Recognizes for data centers, broadband coaxial cables
and F-connectors as specified in ANSI/TIA-568-C.4
TIA-942 Revision B
• Recommended maximum cable lengths for direct attach cabling in EDAs has been reduced from 10 m (33 ft) to 7 m (23 ft). Direct attach cabling between rows is not recommended
• Recommendation that cabinets be at 1200 mm (48”) deep and to consider cabinets wider than 600 mm (24”) wide.
• Recommendation to consider using preterminated cabling. • Recommendation to consider needs for proper labeling,
cable routing, cable management, and ability to insert and remove cords without disrupting existing or adjacent connections.
TIA-942 Revision B • Adds recommendation to install optical fiber cords
and cables with adequate armoring of sufficiently thick jacket in pathways that can create microbends, such as wire basket trays.
• Reduces quantity of convenience outlets required on computer room walls.
• Accommodation for use outside US, for example, local fire protection codes may be used instead of NFPA 75.
• Power for air conditioning systems and controls in computer rooms and entrance rooms should be redundant.
TIA-942 Revision B • Adds normative references to
– ANSI/TIA-5017 regarding physical security – ANSI/TIA-862-B regarding requirements for cabling
for intelligent building systems – TIA TSB 162-A for guidelines regarding cabling for
wireless access points in data centers – TIA TSB-5018 for guidelines regarding cabling for
distributed antenna systems in data centers. • References the revised temperature and
humidity guidelines in ANSI/TIA-569-D-1 adopted from current ASHRAE guidelines
TIA-492AAAE
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