Polarity for Use in Data Centers, Sans and Clouds                                          TSB Rev.1-2013NetIG Technical S...
Polarity for Use in Data Centers, Sans and Clouds                                          TSB Rev.1-2013NetIG Technical S...
Polarity for Use in Data Centers, Sans and Clouds                                          TSB Rev.1-2013NetIG Technical S...
Polarity for Use in Data Centers, Sans and Clouds                                          TSB Rev.1-2013NetIG Technical S...
Polarity for Use in Data Centers, Sans and Clouds                                          TSB Rev.1-2013NetIG Technical S...
Polarity for Use in Data Centers, Sans and Clouds                                          TSB Rev.1-2013NetIG Technical S...
Polarity for Use in Data Centers, Sans and Clouds                                          TSB Rev.1-2013NetIG Technical S...
Polarity for Use in Data Centers, Sans and Clouds                                          TSB Rev.1-2013NetIG Technical S...
Polarity for Use in Data Centers, Sans and Clouds                                          TSB Rev.1-2013NetIG Technical S...
Polarity for Use in Data Centers, Sans and Clouds                                          TSB Rev.1-2013NetIG Technical S...
Polarity for Use in Data Centers, Sans and Clouds                                          TSB Rev.1-2013NetIG Technical S...
Polarity for Use in Data Centers, Sans and Clouds                                          TSB Rev.1-2013NetIG Technical S...
Polarity for Use in Data Centers, Sans and Clouds                                          TSB Rev.1-2013NetIG Technical S...
Polarity for Use in Data Centers, Sans and Clouds                                          TSB Rev.1-2013NetIG Technical S...
Polarity for Use in Data Centers, Sans and Clouds                                          TSB Rev.1-2013NetIG Technical S...
Polarity for Use in Data Centers, Sans and Clouds                                          TSB Rev.1-2013NetIG Technical S...
Polarity for Use in Data Centers, Sans and Clouds                                          TSB Rev.1-2013NetIG Technical S...
Polarity for Use in Data Centers, Sans and Clouds                                          TSB Rev.1-2013NetIG Technical S...
Polarity for Use in Data Centers, Sans and Clouds                                          TSB Rev.1-2013NetIG Technical S...
Polarity for Use in Data Centers, Sans and Clouds                                          TSB Rev.1-2013     NetIG Techni...
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TSB Polarity for Data Centers rev.1 2013

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As the industry continues to move forward in utilizing 40/100GbE solutions, all components must be manufactured to the layout of the designated connectivity method. Differences cannot be reconciled by flipping or switching connector positions in the field anymore.

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TSB Polarity for Data Centers rev.1 2013

  1. 1. Polarity for Use in Data Centers, Sans and Clouds TSB Rev.1-2013NetIG Technical Systems Bulletin (TSB) For Help & Assistance Call NetIG @ (425) 291-4200 or (866) 814-8615 NetIG – Technical Systems Bulletin (TSB) – Polarity for Use in Data Centers SANs and CloudsLiability Disclaimer Regarding Polarity Used in Pre-Terminated Optical Fiber Trunks, Harnesses andAssemblies.As the industry advances from duplex 1/10GbE to a heightened migration to IEEE 802.3ba40/100GbE, ANSI/TIA-568 and ANSI/TIA-942 Standards based solutions and beyond, the greater theemphasis that is being placed on utilizing MPO multi-fiber, multi-channel parallel optical fiber trunkand harness (fan-out) solutions, and in coordination with the continued use of LC connectors.NetIG’s Rapid Cabling Infrastructure (RCI) pre-terminated MPO high-density solutions along withplug and play adapter plates, cassettes and couplers (adapters), provides the means for a successfulmigration to a higher performing plane of bandwidth all designed and engineered to work ininteroperable union.>>>In order to avoid any confusion and error regarding the User’s Polarity Methodology, it is therecommendation of NetIG that the User carefully evaluate, scrutinize, and physically map-out theiraccepted and now specified polarity to be used within their Network Architecture, including jumpers,adapter plates, cassettes, couplers (adapters), harnesses and trunks, literally everything thatemulates from the initial TX transmit port to the final RX receive port must be considered andunderstood.<<<Polarity sample method types are depicted as defined in ANSI/TIA-568-C.0-2-2012, “GenericTelecommunications Cabling for Customer Premises – Addendum 2, General Updates”, andANSI/TIA-568-C.3-1-2011, “Optical Fiber Cabling Components Standard – Addendum 1, Addition ofOM4 Cabled Optical Fiber and Array Connectors”, to help the User determine what polarity methodthey will specify.>>>It is the User’s responsibility to understand and specify the polarity methodology that the Userdesires NetIG to utilize, as the User has the responsibility for managing their data centers.<<<All array connectivity methods share the same purpose and priority, to create an optical fiber pathwayfrom the transmit TX port of one device to the receive RX port of another device. For the sake ofnetwork interoperability, it is recommended that the connectivity-polarity method be selected inadvance and that the same methodology be consistently maintained throughout the entirety of theinstallation.To date, there are a minimal number of published Standards that adequately stipulate polaritysolutions. Optical fiber cable and connectivity manufacturers vary greatly in what they arerecommending to Customers regarding polarity. The images in this document are ANSI/TIAStandards based and have been enhanced for better understanding.As the industry continues to move forward in utilizing 40/100GbE solutions, all componentsmust be manufactured to the layout of the designated connectivity method. Differencescannot be reconciled by flipping or switching connector positions in the field anymore.
  2. 2. Polarity for Use in Data Centers, Sans and Clouds TSB Rev.1-2013NetIG Technical Systems Bulletin (TSB) For Help & Assistance Call NetIG @ (425) 291-4200 or (866) 814-8615 1.1 Type A: 1-1 Fibers positioned sequentially, i.e. 1 – 1 & 12 – 12 Key Up Female w/o pins Key Down Female w/o pinsPosition 1 Blue Fiber #1 Position 1Position 12 Aqua Fiber #12 Position 12End Fiber Sequence (viewing the end face of the connector with key up)_____Near 1 2 3 4 5 6 7 8 9 10 11 12Far 1 2 3 4 5 6 7 8 9 10 11 122
  3. 3. Polarity for Use in Data Centers, Sans and Clouds TSB Rev.1-2013NetIG Technical Systems Bulletin (TSB) For Help & Assistance Call NetIG @ (425) 291-4200 or (866) 814-8615 1.2 Type B: 1-1 Fibers positioned in reverse sequence, i.e. 1 – 12 & 12 – 1 Key Up Female w/o pins Key Up Female w/o pinsPosition 1 Blue Fiber #1 Position 12Position 12 Aqua Fiber #12 Position 1 End Fiber Sequence (viewing the end face of the connector with key up)_____ Near 1 2 3 4 5 6 7 8 9 10 11 12 Far 12 11 10 9 8 7 6 5 4 3 2 13
  4. 4. Polarity for Use in Data Centers, Sans and Clouds TSB Rev.1-2013NetIG Technical Systems Bulletin (TSB) For Help & Assistance Call NetIG @ (425) 291-4200 or (866) 814-8615 1.3 Type C: 1-1 Fibers positioned in flipped pairs, i.e. 1 – 2; 2 – 1; 11 – 12 & 12 – 11 Key Up Female w/o pins Key Down Female w/o pins Position 1 Position 1 Blue Fiber #1 Orange Fiber #1 Aqua Fiber #12 Rose Fiber #12 Position 12 Position 12 Cross Pair End Fiber Sequence (viewing the end face of the connector with key up)______ Near 1 2 3 4 5 6 7 8 9 10 11 12 Far 2 1 4 3 6 5 8 7 10 9 12 114
  5. 5. Polarity for Use in Data Centers, Sans and Clouds TSB Rev.1-2013NetIG Technical Systems Bulletin (TSB) For Help & Assistance Call NetIG @ (425) 291-4200 or (866) 814-8615 Cross Pair5
  6. 6. Polarity for Use in Data Centers, Sans and Clouds TSB Rev.1-2013NetIG Technical Systems Bulletin (TSB) For Help & Assistance Call NetIG @ (425) 291-4200 or (866) 814-861512 – fiber configurations and migration1/10G channel 12-fiber legacy configuration: LC patch cord 12 fiber MPO-LC 1X12 fiber MPO 12 fiber MPO-LC LC patch cord module trunk cable moduleMPO is the designated interface for multimode 40/100G and it is backward-compatible with legacy1G/10G applications as well. Its small, high-density form factor is ideal with higher-speed Ethernetequipment.40G channel 12-fiber legacy configuration: 8 fiber MPO patch cord 2X12 fiber to 3X8 fiber 2X12 fiber MPO 2X12 fiber to 3X8 fiber 8 fiber MPO patch cord MPO module trunk cable MPO module 2X12 fiber to 3X8 fiber MPO adapter 2X12 fiber MPO MPO adapter 2X12 fiber to 3X8 fiber MPO harness plate trunk cable plate MPO harness100G channel 12-fiber legacy configuration: 2X12 fiber to 1X24 fiber MPO adapter 2X12 fiber MPO MPO adapter 2X12 fiber to 1X24 fiber MPO harness plate trunk cable plate MPO harnessParallel optics: Laser-optimized multimode 40G and 100G Ethernet employ parallel optics. Data istransmitted and received simultaneously on MPO interfaces through 10G simplex transmission overeach individual strand of the array cable. Current IEEE channel - lane assignments for activeequipment interfaces determine the transmission methodology.
  7. 7. Polarity for Use in Data Centers, Sans and Clouds TSB Rev.1-2013NetIG Technical Systems Bulletin (TSB) For Help & Assistance Call NetIG @ (425) 291-4200 or (866) 814-8615 2.1 Multiple duplex connectivity Methods for 10GbE 2.1.1 Method A 10GbE7
  8. 8. Polarity for Use in Data Centers, Sans and Clouds TSB Rev.1-2013NetIG Technical Systems Bulletin (TSB) For Help & Assistance Call NetIG @ (425) 291-4200 or (866) 814-8615 2.1.2 Method B 10GbE8
  9. 9. Polarity for Use in Data Centers, Sans and Clouds TSB Rev.1-2013NetIG Technical Systems Bulletin (TSB) For Help & Assistance Call NetIG @ (425) 291-4200 or (866) 814-8615 2.1.3 Method C 10GbE Cross Pair Please Note for Reference: Parallel Optics Lane 40G 12-Fiber MPO 100G 2 X 12-Fiber MPO 100G 24-Fiber MPO
  10. 10. Polarity for Use in Data Centers, Sans and Clouds TSB Rev.1-2013NetIG Technical Systems Bulletin (TSB) For Help & Assistance Call NetIG @ (425) 291-4200 or (866) 814-8615 2.2 Parallel signal Connectivity Methods for 40GbE (1 plug 1 row Transceiver) 2.2.1 Method A 40GbE10
  11. 11. Polarity for Use in Data Centers, Sans and Clouds TSB Rev.1-2013NetIG Technical Systems Bulletin (TSB) For Help & Assistance Call NetIG @ (425) 291-4200 or (866) 814-8615 2.2.2 Method B 40GbE11
  12. 12. Polarity for Use in Data Centers, Sans and Clouds TSB Rev.1-2013NetIG Technical Systems Bulletin (TSB) For Help & Assistance Call NetIG @ (425) 291-4200 or (866) 814-8615 2.2.3 Method C 40GbE` Cross Pair Cross Pair12
  13. 13. Polarity for Use in Data Centers, Sans and Clouds TSB Rev.1-2013NetIG Technical Systems Bulletin (TSB) For Help & Assistance Call NetIG @ (425) 291-4200 or (866) 814-86152.3 Parallel signal Connectivity Methods for 100GbE (Scenario 1: 2 plugs 1 row Transceiver) 2.3.1 Method A 100GbE scenario 113
  14. 14. Polarity for Use in Data Centers, Sans and Clouds TSB Rev.1-2013NetIG Technical Systems Bulletin (TSB) For Help & Assistance Call NetIG @ (425) 291-4200 or (866) 814-8615 2.3.2 Method B 100GbE scenario 114
  15. 15. Polarity for Use in Data Centers, Sans and Clouds TSB Rev.1-2013NetIG Technical Systems Bulletin (TSB) For Help & Assistance Call NetIG @ (425) 291-4200 or (866) 814-8615 2.3.3 Method C 100GbE scenario 1 Cross Pair Cross Pair15
  16. 16. Polarity for Use in Data Centers, Sans and Clouds TSB Rev.1-2013NetIG Technical Systems Bulletin (TSB) For Help & Assistance Call NetIG @ (425) 291-4200 or (866) 814-861524 – fiber configurations and migration1/10G channel 24-fiber legacy configuration: LC patch cord 24 fiber MPO-LC 1X24 fiber MPO 24 fiber MPO-LC LC patch cord module trunk cable module40G channel 24-fiber legacy configuration: 8 fiber MPO patch cord 1X24 fiber to 3X8 fiber 1X24 fiber MPO 1X24 fiber to 3X8 fiber 8 fiber MPO patch cord MPO module trunk cable MPO module 1X24 fiber to 3X8 fiber MPO adapter 1X24 fiber MPO MPO adapter 1X24 fiber to 3X8 fiber MPO harness plate trunk cable plate MPO harness100G channel 24-fiber legacy configuration: 1X24 fiber MPO patch cord MPO adapter 1X24 fiber MPO MPO adapter 1X24 fiber MPO patch cord Plate trunk cable plateAs these illustrations point out, migrating to a 12-fiber-connector-based infrastructure from1 or 10G, to 40 or 100G, will require additional components in every scenario than migrating to a24-fiber connector based infrastructure.16
  17. 17. Polarity for Use in Data Centers, Sans and Clouds TSB Rev.1-2013NetIG Technical Systems Bulletin (TSB) For Help & Assistance Call NetIG @ (425) 291-4200 or (866) 814-8615 2.4 Parallel signal Connectivity for Methods 100GbE (Scenario 2: 1 plug 2 rows Transceiver) 2.4.1 Method A 100GbE scenario 217
  18. 18. Polarity for Use in Data Centers, Sans and Clouds TSB Rev.1-2013NetIG Technical Systems Bulletin (TSB) For Help & Assistance Call NetIG @ (425) 291-4200 or (866) 814-8615 2.4.2 Method B 100GbE scenario 218
  19. 19. Polarity for Use in Data Centers, Sans and Clouds TSB Rev.1-2013NetIG Technical Systems Bulletin (TSB) For Help & Assistance Call NetIG @ (425) 291-4200 or (866) 814-8615 2.4.3 Method C 100GbE scenario 2 Cross Pair Cross Pair19
  20. 20. Polarity for Use in Data Centers, Sans and Clouds TSB Rev.1-2013 NetIG Technical Systems Bulletin (TSB) For Help & Assistance Call NetIG @ (425) 291-4200 or (866) 814-8615 Migration. With the 40G 12-fiber legacy configurations, a second trunk and another set of array harnesses will be needed to achieve 100-percent fiber utilization. For 100G, these additional components will be required for any 12-fiber legacy upgrade. On the other hand, with 24-fiber trunks, a single cable can support a 1G-100G channel and will simplify network upgrades immensely. 1G and 10G networks will link the trunks to active equipment with MPO-LC modules and LC duplex patch cords. When equipment is upgraded, modules and patch cords are exchanged for the appropriate new MPO components, with no need to install new trunks. In addition, limiting changes reduces the inherent risks to network security and integrity whenever move/add/change work is completed. Density. Higher-density connectivity in the enclosure leaves more rack space for active equipment, reducing the total amount of floor space required. Twenty-four-fiber cabling has the obvious advantage. If the active equipment is configured for 24-fiber channel/lane assignments, enclosures can have twice as many connections with the same number of ports compared to 12-fiber (or the same number of connections using only half the ports). Congestion. The flipside of density is congestion. The more connectivity you are able to run in a given footprint, the more crowded it can become at the rack or cabinet. Here again, 24-fiber MPO trunks offer a huge benefit. Anywhere there is fiber, you will have just half the number of cables versus 12-fiber. Runs carry a lighter load, fibers are easier to manage, and improved airflow reduces cooling costs. Being prepared for 40/100G is essential as within a few short years high-speed Ethernet will be common in data centers across all types of organizations. Install a high-performance 24-fiber 40/100G MPO system and realize these benefits when it is time to upgrade your network. Fewer connectivity components to be replaced or added simplifies migration and reduces costs. Higher-density connectivity leaves more rack space for active equipment. Fewer trunks reduce cable congestion throughout the data center. A 24-fiber high-speed Ethernet MPO system will prepare your network for now and the future, and lower your cost of ownership and maximize your return on investment (ROI). Polarity Methods Summarized. ANSI/TIA-568-C Standards based polarity methods and types. ANSI/TIA-568-C.0-2 ANSI/TIA-568-C.3-1 ANSI/TIA-568-C.0-2 Connectivity Array Connector Assembly MPO Connector 10GbE 40/100GbE Array not pinned for 10GbE - Adapter Duplex Patch Cord Connector Patch Cord Pinned for 40/100GbE Not Pinned 1 X AA / BB 1 X Type A Polarity Method A Type A Type A 1 X AB / BA 1 X Type B Polarity Method B Type B Type B 2 X AB / BA 2 X Type B 1 X Type B Polarity Method C Type C Type C 2 X AB / BA 1 X Type CDetermine connectivity polarity method under ANSI/TIA-568-C.0-2 then to ANSI/TIA-568-C.3-1 to choose component type. For network interoperability, thepolarity method type should be selected in advance and maintained throughout the entire installation including jumpers, adapter plates, cassettes, couplers,harnesses and trunks. See also NetIG Technical Systems Bulletin (TSB) on Polarity for Use in Data Centers, SAN and Cloud.20

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