博文

目前显示的是 三月, 2016的博文

Guide to Multimode Fiber Cabling in 40/100G Migration

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Nowadays one and 10 Gbqs data rates are not adequate to meet the continued requirement for expansion and scalability in the data center, thus technology evolves and standards are completed to define higher data rates such as 40/100G Ethernet. In the meanwhile the cabling infrastructures installed today must provide scalability to accommodate the need for more bandwidth in support of future applications. OM3 and OM4 multimode cabling solutions have been proven to be a cost-effective solution for 40G data center. Today’s article will make you familiarize with this new Gigabit Ethernet and OM3/OM4 cabling to help you smoothly upgrade to 40G Ethernet.
Multimode Fibers in Data Center Multimode fiber is more popular in data centers than singlemode fiber. Many people may know the reason—budget. Because the price of multimode fiber is typically much lower than singlemode fiber. Additionally, multimode fibers utilizes the low cost 850nm optical transceiver for both serial and parallel transmis…

40G AOC – A Shining Star in the Data Center

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Recently 40GbE is gradually becoming the dominant Ethernet in the data center, which greatly promote the popularity of 40G components, especially 40G optical transceivers and 40G QSFP+ cables. 40G optical devices, featured by its unique specification, are designed to meet different interconnection applications in data center. It is known that 40G copper direct attach cables (Copper DAC), 40G Active Optical Cables (AOCs) and 40GBASE-SR4 QSFP+ optics are used in data center to achieve 40G interconnection. But according to IHS (a research company), 40G AOC won larger market share than the other two solutions in 2015 and the trend will keep going in 2016. So what makes it so popular in the data center? The following article will list several features of 40G AOC to give you a satisfying answer.



What Is 40G AOC? Before we come to the advantages of 40G AOC, let’s first have a brief overview of the 40G AOC cables. 40G AOC, is mainly used for short-range multi-lane data communication and 40GbE …

Guide to 40 Gigabit Ethernet Cabling With MPO Technology

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In the past decades, the network speed has a great leap from 10Mbit/s in 1983 to today’s 40/100 Gbit/s. Thus new technologies have been developed to support the new transmission rate. Of which MPO technology with multifiber connector make the migration to 40/100 Gigabit Ethernet easier and more efficient, as it offers ideal conditions for setting up high-performance data networks in data centers to achieve greater bandwidth and handle future requirements. This article will briefly introduce the basics of MPO technology and its utilization in 40G Ethernet.
Shedding Light on MPO Connector It is known that MPO connectors (known as multi-fiber push-on or multi-path push-on) can contact up to 72 fibers in a single connection. A connection must be stable and its ends correctly aligned, which is essential for achieving the required transmission parameters. A defective connection may even damage components and cause the link to fail altogether. MPO connectors are available in a female version…

Fiberstore's 10 Gigabit Ethernet Transceivers and Cables Frequently Asked Questions

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What is the difference between SFP+ and SFP? The pinouts of SFP and SFP+ connectors are identical. However, SFP has a maximum data rate of 5Gb/s whereas SFP+ is designed for 10Gb/s. The SFP receptacles and plugs are not as well impedance matched as SFP+ receptacles and plugs. Also SFP+ cable is designed for 10Gb/s whereas SFP cable may not be able to satisfactorily transmit that rate.
What is the distance supported by the SFP+ SR transceiver? The supported distance is up to 300 meters depending on the quality of the multimode fiber (MMF) you use. Quality of MMF is listed as OM1 (up to 33 meters), OM2 (up to 82 meters), OM3 (up to 300 meters), and OM4 (up to 400 meters). Check with the supplier for the cable distance supported. Take GP-10GSFP-1S as an example, it is Dell Force10 10GBASE-SR SFP+ covering a distance of 300m over OM3 multimode cable.
Can I use SFP+ cables in SFP ports? Yes, SFP+ cables are compatible to SFP ports and will work fine. SFP cables are not compatible to SFP+ por…

Quick Overview of 10 Gigabit Ethernet

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As the need for high data rate increases and the supporting optical devices becomes more affordable, many network designers are inclined to upgrade their infrastructure to higher-speed network like 10 Gigabit Ethernet. Currently 10G Ethernet is ubiquitous in data center. But do we really know about 10 Gigabit Ethernet? The following passage will provide some basic information to help you smoothly migrate to 10 Gigabit Ethernet.
Fiber cable type, 10 Gigabit Ethernet physical interface and fiber optical transceiver module are the crucial components of 10GbE deployment. Table 1 demonstrates the standard fiber cables, physical interfaces, and transceiver modules that can be applicable to 10 Gigabit Ethernet.

10G SFP+ transceiver, as an essential component to support 10G network, will be introduced in the next part. SFP+ supports speeds of 10Gbps or higher over fiber. The SFP+ product family includes cages, connectors, and copper cable assemblies. It is also similar to the performance req…

40GBASE QSFP+ AOC or 40GBASE-SR4 QSFP+ For Your Short-reach Application

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As an indispensable component of network design, optical transceiver has been greatly improved in the past decades to cope with the increasing needs for speed and performance. From SFP, SFP+ to QSFP+, smart engineers will always promote a wise solution to realize higher-speed connectivity. For 40G network, 40GBASE-SR4 QSFP+ transceiver just like other modules can support conversion between optical signals and electrical signals of high data rate, making itself a commonly utilized interconnection solution in data center. And there is an alternative for 40G short-reach interconnection—AOC (active optical cable). Usually, a 40G AOC cable contains a fiber optic cable terminated with QSFP+ connectors on both ends. Additionally, there is also other version of 40GBASE QSFP+ AOC with one end connected with a QSFP+ connector and the other end with several SFP+/XFP connectors., this is typically called fanout or breakout 40G AOC cable. 40GBASE QSFP+ to QSFP+ AOC has more advantages in transmis…

Three Basic Types of 1000BASE SFP Modules

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Ever since the Gigabit Ethernet has been applied in the telecom industry, the supporting devices like SFP transceivers have enjoyed popularity among more and more places. But there are several types of SFP transceivers available on the market. Which one suits you better? This article will illustrate three types of SFP transceivers—1000BASE-T SFP, 1000BASE-SX SFP, and 1000BASE-LX/LH SFP. I hope readers can learn something at the end of this text. SFP (Small Form-Factor Pluggable) transceiver is a compact, hot-swappable, input/output device that is used for both telecommunication and data communications applications. As a major component required for Gigabit Ethernet connectivity, SFP interfaces a network device motherboard to a fiber optic or copper networking cable. With so many types of SFP transceivers, users are supposed to select the appropriate one for each link to provide the required optical reach over the available optical fiber type (multimode fiber or single-mode fiber). 100…

10G Ethernet Applications FAQs

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Q: What is 10 Gigabit Ethernet?
As a part of the family of IEEE applications standards, 10G Ethernet is typically developed for copper and fiber optic cabling that support 10 Gigabit per second transmission rates. It offers a straightforward upgrade path for 10 Gigabit Ethernet backbones and makes provisions for linking Ethernet Local Area Networks (LANs) to Metropolitan and Wide Area Networks (MANs and WANs). The most commonly used 10G Ethernet optical devices nowadays is SFP+ transceivers and SFP+ cables. For example, 10G-SFPP-LR and PAN-SFP-PLUS-SR are SFP+ transceivers that can support a link length of 10km and 300m, respectively. Q: What about 10GBASE-T?
The IEEE 802.3an standard (certificated in 2006) described the 10GBASE-T application for operation over category 6/class E, augmented category 6/class E, and class F twisted-pair copper cabling. 10GBASE-T is not targeted for operation over category 5e/class D cabling. Category 6a is required to reach the full distance of 100 meters …

How to Upgrade From 10GbE to 40GbE for Multimode Fiber?

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To cope with the never-ending requirement for higher bandwidth, people are looking to migrate from 10G Ethernet to 40G Ethernet, whilst keeping their fiber infrastructure in compliance. However, the ability to migrate from 10G to 40G hinges on knowing the nature and length of the backbone cable. If you don’t know the overall length of the circuit, connector style (LC, 12 or 24 fiber MPO) or the fiber type (OM2, OM3, OM4, SM, etc.), you will trigger some mistakes during the migration. Then the following passage provides instantaneous access to detailed information about upgrading from 10G to 40G over multimode fiber. Migrating from 10GbE to 40GbE for multimode fiber will require a lot more fibers and a different type of connector. Because 10G SR transceivers require 2 fiber strands per 10G link, 40G SR4 and CSR4 transceivers require a minimum of 8 fiber strands, and often 12 fiber strands in practice. The reason for this requirement is that 40G SR4 and CSR4 transceivers use 4 parallel…