Oct 18

Enhance Your Network With 40G QSFP+ AOC

To meet the requirements for higher bandwidth and throughput, 40 Gigabit Ethernet has become a trend for data transmission. A series of 40G equipment are designed to achieve the seamless interconnection in the 40G network. Devices like 40G fiber optic transceivers and 40G direct attach cables are widely used for the high speed transmission. 40G direct attach cables (DAC) are optimal solutions for short range connectivity. It can be further divided into the direct attach copper cable and active optical cable (AOC). This article will focus on presenting you some cost-effective 40G QSFP+ AOC solutions to improve your network.

Basic Knowledge of Active Optical Cable

AOC is a cabling technology that accepts the same electrical inputs as a traditional copper cable, but uses optical fiber “between the connectors”. It adopts electrical-to-optical conversion on the cable ends to improve speed and distance performance of the cable without sacrificing compatibility with standard electrical interfaces. AOC is especially used for short-range multi-lane data communication and interconnect applications. It is made up of the multimode optic fiber, control chip and different connectors with one end terminated with QSFP+ connector and the other end terminated with QSFP+, SFP+, LC or else connectors.


Reasons for Choosing 40G QSFP+ AOC

However, why do we often use 40G QSFP+ AOC instead of 40GBASE-SR4 QSFP+ module? In fact, 40G QSFP+ AOC has many benefits that will provoke your interest for choosing it. First is the lower cost compared to the module since the AOC saves the need for extra fiber patch cables. Second is the low insertion and return loss. Although it is used for the same transmission distance, the repeatability and interchangeability performances of 40G AOC are better than 40GBASE-SR4 module. Thirdly, under the four-quadrant test, which is used to test whether the product still keeps better performance even under the lowest and highest voltage and temperature situations, the AOCs are qualified to meet all the demands.

40G QSFP+ AOC Solutions

Here provides some common 40G QSFP+ AOC solutions that are welcome in the market.

Each end of this AOC has a QSFP+ connector used for 40G data propagation. The maximum length can reach up to 100 meters. It is a 40 Gbps parallel active optical cable which transmits error-free parallel 4×10 Gbps data over multimode fiber (MMF) ribbon cables.


QSFP+ to 4x SFP+ AOC is a breakout cable offering the professionals a cost-effective interconnect solution for merging 40G QSFP+ and 10G SFP+ between devices of adapters, switches and servers. Users can install this AOC between an available QSFP+ port on their 40Gbps rated switch and feed up to four upstream 10G SFP+ enabled switches.


This is also a breakout AOC with a QSFP+ connector on one end and 8xLC connectors on the other. It is a high performance, low power consumption, long reach interconnect solution supporting the 40G Ethernet compliant with the QSFP+ MSA and IEEE P802.3ba 40GBASE-SR4. It is an assembly of 4 full-duplex lanes. Each lane is able to transmit up to 10 Gbps data rate providing an aggregated rate of 40 Gbps.



Along with the popularity of 40G Ethernet, the market of 40G QSFP+ AOC has been growing over the years. It is definitely a better choice for high speed transmission over short distances. Additionally, if you are looking for higher bandwidth AOCs, there are also 100G QSFP28 AOC and 120G CXP AOC suitable for your needs.

Aug 11

Why Choose Direct Attach Cable in 40G/100G Migration?

Advance technologies like Big Data and Cloud which require high speed of data rate become more and more popular. To meet the ever growing need to high speed data transmission, many data centers are migrating from 10 GbE to 40 GbE or even 100 GbE. And some are considering about the migration, during which the cost is one of the most important factors to consider. Direct attach cable also known as DAC is a cost effective solution during the migration to 40GbE or 100GbE.

What Is Direct Attach Cable

A direct attach cable also known as DAC is usually a fixed assembly supporting high speed data that uses a small form-factor connector module as an optical transceiver on each end of a length of cable. With significant cost-saving and power-saving benefits, direct attach cable is now being widely used in data centers for short reach applications. It can be connected to switches, servers, routers, network work interface cards (NICs), Host Bus adapters (HBAs) providing high density and high data throughput.

Why Choose Direct Attach Cable

Direct attach cable with many significant benefits can satisfy the growing need for high speed data. The main benefits of direct attached cable are described in the following text.

Cost saving: the modules on the end of direct attach cable looks like optical transceivers. However, actually they very much different from optical transceiver. These small form-factor connector modules leave out the expensive optical lasers and some electronic components. That’s the main reason why the DAC is much cheaper than optical transceiver. Direct attach cable in some case can be an alternative to optical transceivers as it eliminates the separable interface between transceiver module and optical cable. Thus, choosing DAC in some cases can save a lot of money as well as time.

Low power consumption: to identify the modules on the end and cable type to the Ethernet interface, in both active direct attach cable and passive direct attach cable a small electrical component is used, which is low cost and consumes very little power compared with optical transceiver.

Supporting high data rate: DAC can provide high speed I/O (input and output) data. The most commonly used DAC can support high data rate of 10 Gb/s and 40 Gb/s. However, as technologies advanced, some vendor can provide direct attached cable supporting 120 Gb/s, like 120G CXP Cables.

Meet small form-factor standards: the modules on each end of DAC meet small form-factor standards which means DAC inherits some advantages of the small form-factor module, like space saving. Some time there is no need to upgrade the equipment by using a DAC.

40GBASE QSFP+ Direct Attach Cable

With various benefits like abilities in data transmission and cost saving, direct attach cable is becoming increasingly popular for short distance top-of-rack (ToR) and middle-of row (MoR) data center deployments. It’s a cost-effective solution to 40G/100G migration. Currently direct attach cable are continuing to evolve to meet industry needs. Various types of directive attach cable are being provided. Fiberstore as a vendor of optical components provides DAC cable assemblies including 10G SFP+ Cables, 40G QSFP+ Cables, and 120G CXP Cables. For information please visit Fiberstore.

Mar 28

Fiberstore QSFP+ to 4 XFP Breakout Cable – the Most Cost-effective 40GbE Transmission Solution for You

Jan. 8th, Shenzhen, Fiberstore News – To meet the needs for migration from 10 to 40 GbE, Fiberstore offers QSFP+ to Four XFP Direct Attach Breakout Cable. As part of the Fiberstore high speed data transport solution, it provide a cost-effective solution for merging 40G QSFP and 10G XFP enabled host adapters, switches and servers.

In today’s enterprise data center and networking enviroments, higher speeds, greater scalability, and higher levels of performance and reliability are needed to better meet the demands of business. In addition, to accommodate the ever-growing number of operating systems and applications residing on individual servers, server virtualization requires significantly increased data transmission between the servers and switches. According to recent industry forecasts, the amount of enterprise data being transmitted will grow at more than 20% between 2011 and 2016. Thus, finding a cost-effective solution to provide more bandwidth, while optimizing power consumption and supporting modularity and scalability is very imperative.

Meeting these ever growing requirements, Fiberstore has expanded its line of high speed data transport solutions to include QSFP+ to 4 XFP breakout direct attached cables. This series of QSFP breakout cables provide low cost and low power consumption interconnect solution for 40-Gigabit Ethernet. QSFP+ to 4 XFP breakout direct attached cable features a single QSFP connector (SFF-8436) rated for 40-Gb/s on one end and (4) XFP connectors (INF-8077i), each rated for 10-Gb/s on the other.

Except the high quality and cost-effective performance, Fiberstore’s R&D team also takes the brand compatibility into account on the QSFP+ to 4 XFP breakout direct attached cable. “To satisfy the compatibility of different brands, clients can order the QSFP+ to 4 XFP Breakout Cables according to their brand requirements. All our QSFP+ to 4 XFP Breakout Cables are 100% compatible with major brands like Cisco, Juniper, Enterasys, Extreme, H3C and so on.” said by Sunnie, the head of high speed data transport solution team in Fiberstore.

QSFP+ to 4 XFP Breakout Direct Attached Cable Introduction

QSFP Plus to 4 XFP breakout Direct attach cable
Product Model 1M(3.3ft) Passive AWG30 40GBASE QSFP+ to 4 XFP Breakout Cable Model# Q4X-PC-30-1-xx 2M(6.6ft) Passive AWG30 40GBASE QSFP+ to 4 XFP Breakout Cable Model# Q4X-PC-30-2-xx

Note: xx means compatible brand(For example: CO= Cisco, JU=Juniper, FD=Foundry, EX=Extreme, NE=Netgear,etc. The two characters are short for compatible brand)

Specifications Connector 1: (1) QSFP 40.0 Gb/s Rated Connector (SFF-8436 Compliant) Connector 2: (4) XFP 10.0 Gb/s Rated Connectors (INF-8077i Compliant) Economically Links up a QSFP port with an Upstream 10GbE-XFP Switch Length: 1m (3.3ft) or 2m (6.6ft) Wire AWG: AWG30 Protocol agnostic support of 40GbE, QDR InfiniBand, SAS & Fibre Channel Up to 10.3125 Gb/s transfer rate per XFP channel (40 Gb/s aggregate) Robust Zinc die-cast XFP & QSFP connectors with pull-to-release latching Bridge the gap between your 10G and 40G capable switches/host adapters Low cross-talk and pair-to-pair skew maintains signal integrity Fully compliant to the latest XFP & QSFP MSA (Multi-Source-Agreement) Supports all current 10-Gigabit Ethernet and 40-Gigabit Ethernet standards Fully RoHS compliant for environmental protection Designated form factor and electrical compliance for QDR InfiniBand
Application Supports all current 10-Gigabit Ethernet and 40-Gigabit Ethernet standards Protocol agnostic support of QDR InfiniBand, SAS & Fibre Channel


Warm Tips: If you are interested in this QSFP+ to 4 XFP Breakout Cable, or other high quality products for high speed data transport solution, you could order it on line directly or contact us over E-mail sales@fs.com. Our engineer will review the project and provide a quotation within 1-2 business days.

About Fiberstore:

Fiberstore is a professional manufacturer and supplier of optical networking solutions. We can supply 100% compatible Direct Attach Cable & Fiber Optic Transceiver modules of many brands with a incredible discount for 10GbE to 40GbE, or even 100GbE applications. In addition, according to your requirements, we welcome any inquiry for customized fiber optical transceiver. Fiberstore’s aim is offering the best quality products and perfect solutions, saving customers’s time and money, making customers enjoy personalization.

Article Source: http://www.fs.com/news/fiberstore-qsfp-to-4-xfp-breakout-cable-the-most-cost-effective-40gbe-transmission-solution-for-you-a-645.html

Feb 13

Ideal High-Speed Interconnect Solution – Direct Attach Active Optical Cables

What is the Ideal High-Speed Interconnect Solution?

The ideal high-speed interconnect solution should have such features as optimized for short distances, low cost, low power consumption, small cable bend radius, low cable weight, high density, and low link latency. The only one solution which can meet all the requirements is the direct attach active optical cables.

Fiberstore's 10G SFP+ AOC

Direct attach active optical cables, or active optical cables for short, are direct-attach fiber assemblies with optical transceiver (SFP+, XFP, QSFP+, CXP etc.) connectors. They are suitable for short distances and offer a cost-effective way to connect within racks and across adjacent racks. Nowadays the Active Optical Cable (AOC) is accelerating data connectivity for storage, networking, and HPC applications. It leverages fiber optic technology for the transmission of data while reducing the weight, density and power consumption of traditional copper solutions.Note: Active optical cables have signal amplification and equalization built into the cable assembly, while passive optical cables don’t.

Fiberstore's 40G QSFP+ AOC

Advantages of Active Optical Cables

The AOC assemblies provide the lowest total cost solution for data centers by having the key advantages as following:

  • Low weight for high port count architectures;
  • Small bend radius for easy installations;
  • Low power consumption enabling a greener environment.

Fiberstore's QSFP+ to 4×SFP+ AOC

Compared to Active & Passive Copper Cable Assemblies

1. Longer reach (> 7 meters)

2. Lower weight and tighter bend radius enable simpler cable management

3. Thinner cable allows better airflow for cooling

4. Lower power consumption

5. No need for power-hungry conditioning ICs on the host board

6. Can be used in architectures with challenging cable routing

Fiberstore's QSFP+ to 8×LC AOC

Compared to Optical Transceivers

1. Datacenter/Consumer friendly: No cleanliness issues in optical connector

2. Cost-optimized: Not constrained by optical interface specifications driven by longer reach applications

(Note: However, the active optical cables cannot be routed through fiber patch panels.)

Fiberstore's 120G CXP AOC

Ideal High-Speed Interconnect Solution

Today’s enterprise data centers and networking environments are undergoing an infrastructure transformation, requiring higher speeds, greater scalability, and higher levels of performance and reliability to better meet the demands of business. As speed and performance demands increase, the AOC assemblies have become an integral part of the overall system design. However, AOC design margins and parameters vary widely, and can be the difference between an optimized, highly reliable fabric and the incompatibility issues that drive up support costs. There are various types of AOC assemblies for 10G, 40G, and 100G applications on the market. Judging from the cost performance, Fiberstore is the only one who can provide the most ideal high-speed interconnect solution of AOC assemblies including 10G SFP+ AOC, 40G QSFP+ AOC, 40G QSFP+ to 4×SFP+ AOC, 40G QSFP+ to 8×LC AOC, and 120G CXP AOC.

Article Source: http://www.fiberopticshare.com/ideal-high-speed-interconnect-solution-direct-attach-active-optical-cables.html

May 27

SFP+ Direct Attach Copper Cable Wiki

Today, SFP+ Direct Attach Copper cable becomes cloud computing and cloud storage mainstream primary connection tool, but what is SFP + DAC cable? For this, different manufacturers of SFP + DAC cable have different presentations and descriptions. And here, we’ve got a number of related information together, mainly to discuss what exactly SFP + DAC cable is and also other details, such as the advantages and disadvantages of passive and active SFP + DAC cables.

Overview of DAC Cable

Before we come to the details about SFP + DAC cable, let’s have a brief overview of DAC cable, Direct attach cable is a form of high speed cable with two connectors on either end which are in the form of optical transceiver module, such as SFP+, QSFP+ and so on, but they not real optical transceiver modules. Direct attach cable can support Ethernet, Infiniband, Fibre Channel and other protocols. And it is mainly used for the connection between switches, servers, routers in the interconnection application of racks. As a cost-effective solution in short reach applications, DAC is usually used in equipment distribution area.

What’s SFP+ Direct Attach Copper Cable?

10G SFP+ Cu(10G SFP+ Cable) is a copper interconnect using a passive twin-ax cable assembly that connects directly into an SFP+ housing. It has a range of 10 meters and like 10GBASE-CX4, is low power, low-cost and low latency with the added advantage of having the small form factor of SFP+, and smaller, more flexible cabling.SFP+ Direct Attach is known as the successor technology to 10GBASE-CX4. SFP+ Direct Attach, as implied in the name, uses SFP+ MSA and by using the inexpensive copper twinaxial cable with SFP+ connectors on both sides, provides 10 Gigabit Ethernet connectivity between devices with SFP+ interfaces. SFP+ Direct Attach has a 10 meter distance limitation, thus the target application is interconnection of top-of-rack switches with application servers and storage devices in a rack.

10G SFP+ Direct Attach Copper Cable

Applications of SFP+ Direct Attach Copper Cable

The SFP+ interface provides the highest density, cheapest, and lowest power 10 Gigabit Ethernetsolution commercially available today. Further SFP+ enables mass migration of the 1GbE network to10 GbE by providing an extremely low priced 10G SFP+ Cu (direct attached copper cable assembly) option for short reach interconnects along with multimode and single mode fiber options. The SFP+ interface accepts along with hot-pluggable, small-footprint, optical transceivers, a Direct Attach Cable(10G SFP+ Cu), which replaces two optical modules and a connectorized optical fiber with a twinaxial copper cable assembly. The 10G SFP+ Cu option is defined for 10GbE applications over passive copper with a reach of 8.5m. The 10G SFP+ Cu link utilizes a receive equalizer from the host PHY/SerDes to be able to compensate for the Inter Symbol Interference (ISI) introduced by the cable. Electrical and mechanical specifications for SFP+ optical modules, 10G SFP+ Cu, and hosts are defined in the SFF-8431 specification developed by the SFF Committee, with broad industry participation.

Advantages of Passive and Active SFP+ DAC Cables

Passive cables are much less costly but require the host to do the work of driving it properly. They are lower in costs and have higher reliability. While active cables provide the added benefit of being “optical-module” like. They are characterized by enhanced signal integrity, longer cable lengths, transmit pre-emphasis, active/adaptive receive equalization, Tx Disable, loss of signal (LOS) and interrupts. Their management interface which looks like an optical module and you don’t have to worry about host Tx/Rx for Cu cables.

Disadvantages of Passive and Active SFP+ DAC Cables

Passive cables have no LOS, no TX disable and no Interrupts. Their management Interface is limited and host must drive Cu cable. While active cables are more expensive.


SFP+ DAC cable is a cost-effective, proven solution for interconnecting networking applications. Fiberstore provides high quality SFP+ DAC cables for you. If you want to know more details,  you can visit our site. You can also get the details about other Fiber Optic Transceivers easily from Fiberstore.

May 26

Customized 40G QSFP+ to 8LC Breakout AOC Solutions in FS.COM

As people are expecting more information to be available at their fingertips, fiber network deployment should be quicker and easier. Active optical cable(AOC) is a good solution to this issue. AOC is a cable assembly which is permanently terminated with QSFP+ modules at both ends. It use electrical-to-optical conversion on the cable ends to improve speed and distance performance of the cable without sacrificing compatibility with standard electrical interfaces for short-range multi-lane data communication and interconnect applications. Nowadays, the market of AOC keeps growing has a bright future, especially in 40G Ethernet. This post will mainly introduce one 40G AOC type—40G QSFP+ to 8LC Breakout AOC.

40G QSFP+ to 8LC Breakout AOC Overview

QSFP+ to 8LC breakout AOC is a high performance, short-reach interconnect solution supporting 40G Ethernet, fiber channel with low power consumption. It is compliant with the IEEE P802.3ba 40GBASE-SR4 and QSFP MSA.

40G QSFP+ to 8LC breakout active optical cable offers IT professionals a cost-effective interconnect solution for merging 40G QSFP and 10G SFP+ enabled host adapters, switches and servers. It is a high data rate parallel active optical cable (AOC), to overcome the bandwidth limitation of traditional copper cable. The AOC offers 4 independent data transmission channels and 4 data receiving channels via the multimode ribbon fibers, each capable of transmitting data at rates up to 10Gb/s, providing an aggregated rate of 40Gb/s. QSFP+ breakout cable is suitable for short distances and offer a highly cost-effective way to connect within racks and across adjacent racks. These breakout cables connect to a 40G QSFP+ port of a switch on one end and to four 10G SFP+ ports of a switch on the other end. Consequently, an aggregate data rate of 40Gbps over 100 meters transmission can be achieved by this product, to support the ultra-fast computing data exchange.

40G QSFP+ to 8LC Breakout AOC

FS.COM Customized 40G QSFP+ to 8LC Breakout AOC

Besides, standard 40G QSFP+ to 8LC Breakout AOC in already designed length, FS.COM also provides custom service for 40G QSFP+ to 8LC breakout cable. You DIY your own AOC cable, including cable length, cable color, DOM, and so on according to your practical needs. All of FS.COM 40G QSFP+ to 8LC breakout AOC are 100% compatible with major brands like Cisco, HP, Juniper, Enterasys, Extreme, H3C and so on. If you would like to order high quality compatible 40G QSFP+ to 8LC breakout AOC and get worldwide delivery, this new version 40G QSFP+ to 8LC breakout AOC opens EEPROM for customer re-coding for different applications. FS.COM provide customized length within 100m of choice(40G QSFP + ports consumes less than 1.5W).