Tag Archives: MPO cable

Fiber Patch Cable Solutions for High Speed Applications

We know that fiber optic jumper cables are designed to interconnect or cross connect fiber networks within structured cabling systems. They are commonly used in data centers to interconnect ports and transceivers that accept LC and MPO/MTP fiber optic connectors. There are a full range of cost-effective fiber optic patch cable solutions to meet your demands now and even for your future upgrades. This post will demonstrate high-speed fiber patch cable solutions for 10G, 40G, and 100G Ethernet transceiver ports interconnection.

10G Transceiver Interconnection Solution

Today’s data centers are still primarily architected around 10 Gigabit Ethernet (GbE). After almost ten years of revolution, SFP+ optical transceiver gradually becomes the main stream of 10G transceiver in data center optics market. According to the optical ports of SFP+ form factor, LC duplex fiber patch cable is required to complete the link between two SFP+ transceiver modules which are plugged into switches, routers or server NICs (Network Interface Cards), as shown in the following picture. High quality standard LC duplex patch cables are available in both single-mode and multimode versions, which are LC LC single-mode duplex fiber cable and LC LC multimode duplex fiber cable. With a wide range of material options, they can meet any working environment.

10G Transceiver Interconnected Solution

40G Transceiver Interconnection Solution

In recent several years, 40 GbE has gained more popularity and the market of 40GbE is encouraging. As data centers tend to deploy 40G Ethernet, 40G transceivers are ramping up. QSFP+ (quad small form-factor pluggable plus), as the most popular form factor for 40 GbE, has been widely used in data center switching fabrics. For the short reach interconnection between two QSFP+ optical transceiver ports, each QSFP+ module requires an MPO/MTP connection, as shown in the following picture. MTP to MTP (or MPO to MPO) assemblies can also be in single-mode or multimode versions, with jacket ratings of riser, plenum or LSZH. Users can easily upgrade their networks to future 40/100G applications with popular multimode OM3 and OM4 cable assemblies. Note: For single-mode 40G QSFP+ interconnection, duplex LC single-mode patch cable is commonly used; but for 40GBASE-PLRL4 QSFP+ interconnection, a 12-fiber MPO/MTP single-mode cable is needed.

40G Transceiver Interconnected Solution 1

Other than the QSFP+ to QSFP+ connection, a single QSFP+ port (4 x 10 Gbps) can also breakout to four SFP+ ports, which is another interconnected solution for 40G transceiver. Using an MPO/MTP to LC assemblies, as shown in the following picture, can easily achieve the migration of 10G to 40G.

40G Transceiver Interconnected Solution 2

100G Transceiver Interconnection Solution

As the increasing bandwidth requirements of private and public cloud data centers and communication service providers, 100GbE has been growing rapidly and 2016 is considered as the year of 100G. Various 100G transceivers, such as CXP, CFP, CFP2, CFP4 and QSFP28 are available for different applications requiring data rates of 100G.

CXP/CFP to CXP/CFP Interconnection

24-fiber MPO/MTP assemblies, implemented with 10 lanes of 10 Gbps, are ideal for 100GBASE-SR10 CXP/CFP to CXP/CFP interconnection in data center. Among the 24 fibers, only 20 fibers in the middle of the connector are used to transmit and receive signals at 10 Gbps and the 2 top and bottom fibers are unused. The picture below shows the interconnection between two 100GBASE-SR10 CXP ports.

100G Transceiver Interconnected Solution 1

QSFP28 to QSFP28 Interconnection

QSFP28 optical transceiver has the exact same footprint as the 40G QSFP+ module, but QSFP28 is implemented with four 25Gbps lanes. To interconnect a multimode QSFP28 link, a 12-fiber MPO/MTP patch cable is required, but for a single-mode link (100GBASE-LR4 QSFP28), a duplex LC single-mode patch cable is required. The interconnection of QSFP28 multimode link is similar with the case of 40GBASE-SR4 QSFP+.

CXP/CFP to 10 SFP+ Interconnection

As mentioned above, 100GBASE-SR10 CXP/CFP module uses ten 10Gbps lanes to achieve 100Gbps data rate. Thus, a CXP/CFP port can be breakout to ten SFP+ ports using a 24-fiber MTP to LC harness cables, as shown in the following picture.

100G Transceiver Interconnected Solution 2

Conclusion

From 10G to 40G to 100G data center networks, bandwidth requirements have been increasing rapidly. Equipment needed to achieve those bandwidths have also improved a lot. Various high-speed fiber patch cable solutions are required for 10G, 40G, and 100G Ethernet transceiver ports interconnection. You just need to make the appropriate choices based on your requirements.

How Do OS1 and OS2 Differ from Each Other?

These are two standards for single mode fibre optic cabling that are generally used today, OS1 and OS2. OS1 and OS2 are cabled single mode optical fibre specifications. The difference between OS1 and OS2 fiber optic cables mainly lie in the performance due to cable construction. How are OS1 and OS2 single mode fiber cables constructed? Choosing the right fiber jumper is very critical to improve the functionality of your network. Here is some information related to the differences between the OS1 and OS2 single mode fiber cables.

OS1-and-OS2-Fiber-Optic-Cable

Cable Construction and the Differences

OS1 single mode fibers are compliant with ITU-T G.652A/B, and the low-water-peak fibers defined by ITU-T G.652C and G.652D also come under OS1 single mode fibers, that is to say OS1 is compliant with specifications of ITU-T G.652. OS1 cabling is tight-buffered construction, embedded in a heavy polymer jacket. The jacketed fiber is generally enclosed, with a bundle of flexible fibrous polymer strength members like aramid in a lightweight plastic cover to form a simple cable.

OS2 single mode fibers are only compliant with ITU-T G.652C/D standards, which means that OS2 fibers are very clearly the low-water-peak fibers only. OS1 was first introduced in the year 2002 and OS2 in the year 2006. OS2 cabling is loose-tube design. Cable with this construction is appropriate for outdoor cases. For use in more strenuous environments, a much more robust cable construction is required. In loose-tube construction, the fiber is laid helically into semi-rigid tubes, allowing the cable to stretch without stretching the fiber itself. This protects the fiber from tension during laying and due to temperature changes.

Applications

For their different cable constructions, OS1 and OS2 fiber cables have different application areas. OS1 is for indoor use, such as campusand data centre. Cabling is is tight buffered (manufactured into solid medium). Indoor fiber is more tolerant of bending. The fiber is more plastic and able to bend plus the buffered cable reduces the risk of catastrophic damage. OS2 is for outdoor or loose tube use, like street, underground/burial, etc. Outdoor fibers are bend sensitive and thus more likely to break during install unless care is taken.

Besides, they also have different degrees of attenuation. OS1 indoor fiber has greater loss per kilometer than OS2. In general, the maximum attenuation for OS1 is 1.0 db/km and 0.4db/km for OS2. As a result, the maximum transmission distance of OS1 single mode fiber is 2 km but the maximum transmission distance of OS2 single mode fiber can reach 5 km and up to 10 km. Though the maximum transmission distance of OS2 single mode fiber is much longer than that of OS1, OS1 is much cheaper than OS2 for the cheaper materials.

Conclusion

But both OS1 and OS2 cable types allow a distance of one to 10 gigabit Ethernet. And another point which needs to be paid attention to is that OS2 single mode optical fiber cables can not be connected with OS1 single mode optical fiber cables because it may lead to unpredictable signal performance. Fiberstore supplies both OS1 and OS2 single mode patch cables, and all other kinds of fiber patch cords with differernt connector options, such as SC single mode patch cable, LC multi-mode patch cable, MPO cable, etc. We provide fiber-based patch cables with high quality.