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40GBASE-SR4 QSFP Transceiver Interconnection Cabling

As we all know, the standard specifies MPO as a connector to the 40GBASE-SR4 QSFP transceiver. To connect a QSFP to QSFP , we usually use a MTP 12-fiber trunk cable. In the 40GBASE-SR transmission, there are eight fibers associated with the channel—four fibers for the TX signal and four fibers for the RX signal. Therefore only 8 of the 12 fibers are used, where the remaining four are not used, and can optionally be not present in the cable. So we can also choose a MTP 8-fiber trunk cable for connectivity. Besides this, there are a number of other factors also needed to be considered when to choose a right MTP trunk cable for 40GBASE-SR4 QSFP connectivity. This article explains 40GBASE-SR4 QSFP to 40GBASE-SR4 QSFP cabling selections.

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40GBASE-SR4 QSFP Transceiver Interconnection Cabling

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  1. WHITE PAPER 40GBASE-SR4 QSFP+ Transceiver Interconnection Cabling As we all know, the standard specifies MPO as a connector to the 40GBASE-SR4 QSFP+ transceiver. To connect a QSFP+ to QSFP+, we usually use a MTP 12-fiber trunk cable. In the 40GBASE-SR transmission, there are eight fibers associated with the channel—four fibers for the TX signal and four fibers for the RX signal. Therefore only 8 of the 12 fibers are used, where the remaining four are not used, and can optionally be not present in the cable. So we can also choose a MTP 8-fiber trunk cable for connectivity. Besides this, there are a number of other factors also needed to be considered when to choose a right MTP trunk cable for 40GBASE-SR4 QSFP+ connectivity. This article explains 40GBASE-SR4 QSFP+ to 40GBASE-SR4 QSFP+ cabling selections. Use Single-mode or Multimode MTP Trunk Cable? In the market, both single-mode and multiode MTP trunk cable are available. Which one should I use? According to 40GBASE-SR4 standards, 40GBASE-SR4 QSFP+ transceiver supports link lengths of 100 meters and 150 meters, respectively, on laser-optimized OM3 and OM4 multimode fibers. Therefore, to connect a 40GBASE-SR4 QSFP+ to 40GBASE-SR4 QSFP+, we should choose OM3 or OM4 multimode MTP trunk cables. If you want to achieve a relatively longer transmission distance, OM4 MTP Trunk cable is more suitable for you. Fiberstore (FS.COM) | 40GBASE-SR4 QSFP+ Transceiver Interconnection Cabling Fiberstore (FS.COM) | 40GBASE-SR4 QSFP+ Transceiver Interconnection Cabling

  2. WHITE PAPER MTP Trunk Cable Polarity Selection: A, B or C? In terms of MTP trunk cable, there are three kinds of polarity options (A, B and C). Which one to choose? In fact, according to the IEEE 40GBASE-SR4 specifications, we must select a type B MTP 8-fiber or MTP 12-fiber trunk cable. The picture below shows the working principle of type B MTP 12-fiber trunk cable. The type B trunk cable has opposing connectors with both keys oriented facing up, however the fiber positions are reversed at each end i.e. the fiber at position 1 at one end is connected to position 12 in the connector at the opposing end. Choose Male or Female MTP Trunk Cable? In terms of a MPO connector, it is divided into male and female types. They ensure that the adapter holds the connector with the correct ends aligned with each other. A MPO trunk cable usually has two MPO connector on each side. Therefore, MTP trunk cables are available in male–male and female–female two versions. According to IEEE standards, MPO optics in a 40GBASE-SR4 transceiver are always male connectors, and therefore will always accept female MPO connectors. So if we want to connect a 40GBASE-SR4 QSFP+ to a 40GBASE-SR4 QSFP+ successfully, we must choose a female–female MTP trunk cable. Fiberstore (FS.COM) | 40GBASE-SR4 QSFP+ Transceiver Interconnection Cabling Fiberstore (FS.COM) | 40GBASE-SR4 QSFP+ Transceiver Interconnection Cabling

  3. WHITE PAPER 40GBASE-SR4 QSFP+ Transceiver Interconnection MTP Trunk Cabling Solutions 40GBASE-SR4 QSFP+ Transceiver Part Number Image Description Cisco QSFP-40G-SR4 Compatible 40GBASE-SR4 QSFP+ Transceiver (MMF, 850nm, 150m, MTP/MPO, DOM) QSFP-40G-SR4 Juniper QFX-QSFP-40G-SR4 Compatible 40GBASE-SR4 QSFP+ Transceiver (MMF, 850nm, 150m, MTP/MPO, DOM) QFX-QSFP-40G-SR4 HP JG325B Compatible 40GBASE-SR4 QSFP+ Transceiver (MMF, 850nm, 150m, MPO, DOM) JG325B 40GBASE-SR4 QSFP+ to 40GBASE-SR4 QSFP+ MTP Trunk Cables Fiberstore (FS.COM) | 40GBASE-SR4 QSFP+ Transceiver Interconnection Cabling Fiberstore (FS.COM) | 40GBASE-SR4 QSFP+ Transceiver Interconnection Cabling

  4. WHITE PAPER Part Number Image Description OM3 Type B Female–Female MTP8 to MTP8 Trunk Cable FS8OM3-2MTP-x OM4 Type B Female–Female MTP8 to MTP8 Trunk Cable FS8OM4-2MTP-x OM3 Type B Female–Female MTP12 to MTP12 Trunk Cable FS12OM3-2MTP-x OM4 Type B Female–Female MTP12 to MTP12 Trunk Cable FS12OM4-2MTP-x Conclusion In summary, if we want to complete a connection between two 40GBASE-SR4 QSFP+ transceivers, we can choose MTP 8-fiber or MTP 12-fiber trunk cables. Cable must be either OM3 or OM4 type. Besides, only a type B female – female MTP trunk cable can satisfy your needs. Fiberstore provides wide brand compatible 40GBASE-SR4 QSFP+ transceivers and all kinds of MTP trunk cables. Each fiber optic transceiver has been tested to ensure its compatibility and interoperability. Please rest assured to buy. For more information or quotation, please contact us via sales@fs.com. Fiberstore (FS.COM) | 40GBASE-SR4 QSFP+ Transceiver Interconnection Cabling Fiberstore (FS.COM) | 40GBASE-SR4 QSFP+ Transceiver Interconnection Cabling

  5. WHITE PAPER Contact Us Follow us Manufacturing R & D (China) North America (United States) Eastern Side, Second Floor, Science & Technology Park, No.6, Keyuan Road, Nanshan District, Shenzhen 518057, China Tel: +86 (755) 8300 3611 Fax: +86 (755) 8326 9395 Email: sales@fs.com 331 Andover Park East Ste330, Tukwila, WA 98188,United States Tel: +1-425-226-2035 Fax: +1-253-246-7881 Email: sales@fs.com LinkedIn Twitter Facebook G+ APAC Office (Hong Kong) London Office (United Kingdom) Pinterest 1220 Tung Chun Commercial Centre, 438-444 Shanghai Street, Kowloon, Hong Kong Tel: +852 81763606 Fax: +852 81763606 Email: sales@fs.com Third Floor 207 Regent Street, London, W1B 3HH, United Kingdom Tel: +44 2081441980 Youtube Blog Notice: This document is for informational purposes only and does not set forth any warranty, expressed or implied, concerning any equipment, equipment features, or service offered or to be offered by Fiberstore. Fiberstore reserves the right to make changes to this document at any time, without notice, and assumes no responsibility for its use. This information document describes features that may not be currently available. Contact a Fiberstore sales team for information on feature and product availability. Fiberstore (FS.COM) | 40GBASE-SR4 QSFP+ Transceiver Interconnection Cabling Fiberstore (FS.COM) | 40GBASE-SR4 QSFP+ Transceiver Interconnection Cabling

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