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DATA CENTER OPTICAL ASSEMBLIES
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DATA CENTER OPTICAL ASSEMBLIES TO SUPPORT QSFPf CFP AND CXP INDUSTRY STANDARD PINOUT CONFIGURATIONS

Data Center Optical Assemblies to Support QSFP CFP and CXP Industry , Standard Pinout Configurations QSFP, QSFP+ and zQSFP+ optical cable assemblies use lowprofile round cables for improved cable management in high‑density applications Molex Quad Small Form Pluggable (QSFP+) passive optical cable assemblies meet the QSFP+ interface specification. Multiple cable designs provide improved fiber management options depending on the application and distance requirements. MTP QSFP+ cables are constructed with 12-fiber 3.0mm round cable for short-run interconnect cable assemblies. A robust 4.5mm...

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Understanding MPO Polarity as it relates to end to end fiber links: To understand the polarity of an MPO cable, you must first start with the key on the MPO connector. Each mPo connector will have a keying feature that will govern the polarity on an end to end link. When installing MPO cables, the key can be oriented in a key up/Key up or Key up/Key Down configuration. In the below image you will notice the Key feature on the MPO connector highlighted in orange. Fiber Ribbon Guide Pins/Holes

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When MPO connectors are installed in a Key up position, the fibers in the MT ferrule will be 1-12 and from left to right in ascending order as seen below. When the MPO is installed in a Key Down position, the fiber path is inverted to 12-1 or from left to right in a descending order as shown below.

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The next image will outline a Key Up/Key Up configuration. With this orientation the fiber path will be as follows, fiber 1 on connector A will be aligned with fiber 12 on connector B. In this example below, we will see the Key Up/Key Down orientation where fiber 1 on connector A is aligned with fiber 1 on connector B. Understanding fiber path and alignment is crucial when designing in MPO/MTP cables as this will dictate the signal path from end point to end point.

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With understanding polarity as noted above, we can now review the details regarding the “Type” of With understanding polarity as noted above, we can now review types or configurations of cable MPO/MTP cables that are available for sale. There are three different the details regarding the “Type” of MPO/MTP cables that are available for sale. There are three different types or that can be used to manage fiber polarity, they are Type A, Type B and Type C. Each of these cable configurations of cable that can be used to manage fiber polarity, they are Type A, Type B and configurations are listed...

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'Distances are Industry standard averages and are subject to various transmission issues such as glass quality and device performance. Cable Performance Specifications Ordering Information — QSFP, CXP and CFP Cables Please note that additional lengths, styles and custom cables are available, please contact Molex Sales. Please contact your local Molex Sales Engineer for more details and drawing availability. Part Number *Cables longer than 30.0m will be supplied with 4.5mm ruggedized jacketed fiber "Breakout cables available with FlexiBend MTP connector - please contact Molex sales for details

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molex Part Number

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*Cables longer than 30.0m will be supplied with 4.5mm ruggedized jacketed fiber.

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*Cables longer than 30.0m will be supplied with 4.5mm ruggedized jacketed fiber. **Breakout cables available with FlexiBend MTP connector, please contact Molex Sales for details.

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MPO/MTP Trunk Cables for Data Centers Refer to individual drawings or product specifications for additional details. *For 24 fiber cables, refer to sales drawing for channel pin-out.

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Ethernet InfiniBand Fibre Channel PCIe SAS M Note: Port Bandwidth = Data Rate x Number of Lanes

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§ In development ** Additional product detail available from www.molex.com/link/datacenter.html Abbreviations Fibre Channel (FC), Fibre Channel over Ethernet (FCoE), InfiniBand (IB), Serial Attached SCSI (SAS)

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Get more insights at: www.molex.com/fiber/index.html Molex is a registered trademark of Molex, LLC in the United States of America and may be registered in other countries; all other trademarks listed herein belong to their respective owners

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