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25 Jan 2016

With speeds in the data center now increasing from 10 Gbps to 40 Gbps and eventually to 100 Gbps, different optical technologies and cabling infrastructure are required. The QSFP+ transceiver is the dominant transceiver form factor used for 40 Gigabit Ethernet applications. In 2010 the IEEE standard 802.3ba released several 40-Gbps based solutions, including a 40GBASE-SR4 parallel optics solution for MMF. Since then, several engineered solutions have been released, including 40GBASE-CSR4, which is similar to 40GBASE-SR4 but extends the distance capabilities. This article will mainly introduce the typical cabling components and the cabling options for 40Gbps parallel optical modules.

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Typical Cabling Components

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19 Jan 2016

As the speed and transfer rates of computer hardware continue to grow alongside demand for ever-more data, new cabling becomes a necessity to keep up. Backbones for 40G on multimode fiber generally use MPO connectors which work with QSFP+ transceivers to allow four simultaneous 10G or better connections. An upgrade to QSFP+ can mean a significant reduction in overall cabling, which brings better reliability and cost-effectiveness.

MPO can work at higher speeds as well, able to bundle hundreds of individual fiber lines at once into a single terminator. As this is a relatively new standard, MPO connectors are not well-understood by many people. However, they're necessary to deliver the speeds promised by today's top-line...



15 Jan 2016

To support the changing and fast-growing bandwidth demands of data centers, the IEEE published the IEEE 802.3ba standard for 40 Gigabit Ethernet in June 2010. 40 Gigabit Ethernet is a standard that enables the transfer of Ethernet frames at speeds of up to 40 gigabits per second (Gbps), allowing 40 Gigabit Ethernet-enabled equipment to handle traffic at the aggregation and core layers. A right and cost-effective solution for 40 Gigabit Ethernet is very necessary in data center communications. This article will introduce some types of cables and optical transceivers used in 40 Gigabit Ethernet.

The cable applied in 40 Gigabit Ethernet can be optical fiber or copper cable. With regard to cabling, OM3 or OM4 is optimal for the 40 Gigabit...



14 Jan 2016

Huawei and Cable & Wireless Communications have claimed the first successful trial of ‘the fastest copper based broadband service across Latin America’ using G.fast technology.

The trial was conducted specifically by CWC Panama, where it is the largest telecoms service provider. It lasted two months and averaged 500 Mbps download and 150 Mbps upload over existing copper fixed lines.

“We are thrilled to announce that Cable & Wireless Panama was the first market across Latin America to have successfully completed testing of the G.fast technology, which can deliver high speeds, to its customers through the fastest copper based fixed line broadband technology across the region reaching speeds of 500 Mbps,” said Carlo Alloni, Group...



12 Jan 2016

In June 2010, IEEE published the IEEE 802.3ba standard for 40 Gigabit and 100 Gigabit Ethernet. The market for 100G Ethernet is driven by high bandwidth switching and routing for core network aggregation of 10G and 40G Ethernet links. 40G and 100G Ethernet networks are more and more installed to meet the increasing requirement for higher speed and more bandwidth.

The CFP transceiver is defined as hot-pluggable optical transceiver form factors to enable 40 Gbit/s and 100 Gbit/s applications, which is specified by a multi-source agreement to produce a common form-factor for the transmission of high-speed digital signals. The c stands for the Latin letter C used to express the number 100 (centum). CFP transceiver was designed after SFP...



07 Jan 2016

A small form-factor pluggable (SFP) is a type of transceiver device that has been standardized by the MSA (multi-source agreement). The MSA will define the characteristics of the system and is typically an agreement between multiple manufacturers. The agreements guarantee that any SFP or SFP+ device from any vendor will function properly. This article will give you a more comprehensive introduction to the SFP and SFP+MSA.

An Overview of Pluggable Optical Transceiver MSA Standards

Both SFP and SFP+ optical transceivers are standardized by MSA. These documents strictly define sufficient characteristics of an optical transceiver so that system (like Ethernet switch, Router, and media converter) vendors may implement ports on their...



04 Jan 2016

A direct attach cable (DAC) is a fixed assembly that is purchased at a given length, with the connector modules permanently attached to each end of the cable. The direct attach cable is designed to use the same port as an optical transceiver, but compared with optical transceivers, the connector modules attached to the DAC leave out the expensive optical lasers and other electronic components, thus achieving significant cost savings and power savings in short reach applications.

Types of DAC

The direct attach cable can be divided into different types according to different criteria. According to the cables used, the direct attach cables include copper cable assemblies and fiber optic cable assemblies. Besides, DAC cable assemblies...



30 Dec 2015

When setting up your network, the SFP transceivers you use have great effect on the performance of your system. These SFP transceivers are compatible with multiple devices, but the compatibility of them depends on various factors. Two main factors that should be considered when selecting SFP modules are DDM functionality requirements and checking the ID code and lock out third party components. Here are some details about the factors you should know about SFP transceivers.

Does SFP Require DDM Function?

An SFP does not necessarily require the DDM functionality, but your application should be compatible with digital diagnostic functionality if it is present. Most designers forget to verify the compatibility before design then face...



28 Dec 2015

10 Gigabit Ethernet or 10GbE is a group of computer networking technologies for transmitting Ethernet frames at a rate of 10 gigabits per second. Nowadays, 10 Gigabit Ethernet is gaining broader deployments by the increasing bandwidth requirements and the growth of enterprise applications. In the world of 10 Gigabit Ethernet, selecting the appropriate 10-gigabit physical media is a challenge, because 10GbE is offered in two broad categories: optical and copper. This article will introduce both optical and copper cabling options for 10 Gigabit Ethernet.

Fiber Optical Cabling

Single-mode fiber (SMF), typically with an optical core of approximately 9 μm (microns), has lower modal dispersion than multimode fiber. It is able to support...



24 Dec 2015

1000BASE-T Gigabit Ethernet over Category 5 copper cabling is an attractive option for network managers for several reasons. It addresses the exploding bandwidth requirements on current networks that are the result of implementation of new applications and the increasing deployment of switching at the edges of the network. Gigabit Ethernet leverages the organization’s existing investment in Ethernet and Fast Ethernet infrastructures, and it provides a simple, cost-effective performance boost while continuing to use the dominant horizontal/floor-cabling medium.

1000BASE-T Key Specifications

1000BASE-T is specified to run over four pairs of Category 5 balanced cabling. The 1000BASE-T standard leverages the existing cable...