#QSFP Direct Attach Cables

[fibrecrossltd]

What is a DAC cable? | Fibrecorss

A DAC (Direct Attach Cable) is a high-performance, cost-effective networking solution designed for short-range, high-speed data connectivity in data centers and enterprise environments. These twinaxial copper cables feature integrated transceivers on both ends, enabling seamless connections between switches, routers, servers, and storage devices without the need for separate optical transceivers. DAC cables support a variety of speeds, including 10Gbps (SFP+), 25Gbps (SFP28), 40Gbps (QSFP+), 100Gbps (QSFP28), 200Gbps (QSFP56), 400Gbps (QSFP-DD), and up to 800Gbps.DAC cables are ideal for applications requiring low latency and high bandwidth

[technationgr]

HUAWEI HIGH SPEED STACKING CABLΕ 40G

High Speed Direct-attach Cables QSFP+, 40G, 1m, QSFP+38M, CC8P0.254B(S), QSFP+38M Used indoor

[hound-dog-development]

AddOn Juniper Networks JNP-QSFP-AOCBO-3M Compatible TAA Compliant 40GBase-AOC QSFP+ to 4xSFP+ Direct Attach Cable (850nm, MMF, 3m)

AddOn Juniper Networks JNP-QSFP-AOCBO-3M Compatible TAA Compliant 40GBase-AOC QSFP+ to 4xSFP+ Direct Attach Cable (850nm, MMF, 3m)

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Data Center Cabling Solution: Active Optical Cable

As data rates rise and data center grows in size, copper cable is getting stretched to its limits. However,  active optical cable (AOC) has emerged to replace copper cable in data centers and high-performance computing (HPC) applications. It provides high-speed, high reliability, high flexibility, and low power consumption. This article will provide some knowledge of AOC cable. 

What is an Active Optical Cable?

Active optical cable (AOC) is an optical fiber jumper cable terminated with optical transceivers on both ends. It uses electrical-to-optical conversion on the cable ends to improve the speed and distance performance of the cable without sacrificing compatibility with standard electrical interfaces.

Active Optical Cable Structure

AOC cable consists of the fiber optic connector and fiber cable. The connection between fiber cable and fiber optic connectors is not separable. If the fiber optic connector or fiber cable needs to be changed, they should be removed together. The electrical and optical signal conversion can be achieved right through each end of the optical fiber.

Active Optical Cable Types

There are several varieties of AOC cable available on the market , including 10G SFP+ AOC, 25G SFP28 AOC,40G QSFP+ AOC, 56G QSFP+ AOC, 40G QSFP+ to 4x SFP+ breakout AOC, 40G QSFP+ to 8x LC breakout AOC, 100G QSFP28 AOC, 100G QSFP28 to 4x SFP28 breakout AOC and 120G CXP AOC, etc. These AOC cables are commonly used for short-range multi-lane data communication and interconnect applications between two devices, such as rack-to-rack, shelf-to-shelf interconnect, storage, hubs, switches, routers, servers, etc.

Features and Benefits

AOC cable provides low power consumption, high density, high speed, high reliability, high security, small size, strong heat dissipation, low electromagnetic interference, long transmission distance, low energy consumption, low latency, lightweight, and ease of installation.

Application Scenarios

AOC Cable is used to connect top-of-row (ToR) switches to end-of-row aggregation switches, and to connect the ToR switch with storage subsystems at reaches greater than direct attach copper (DAC) limits of 3-7 meters. The following three scenarios show the specific applications.

Scenario 1:  AOC cable is used to connect two switches directly.

Scenario 2: The breakout AOC cable provides a highly cost-effective way to connect within racks and across adjacent racks. The following figure shows 40GbE QSFP+ to 4 x SFP+ AOC cable connecting to a 40G QSFP+ port switch on one end, and to four 10G SFP+ port switches on the other end.

Scenario 3: For the long-haul transmission between the two switches, a suitable solution is recommended to use single-mode patch cable, OEO converters, and AOC cables, which can provide seamless integration of different fiber types by converting multi-mode fiber to single-mode fiber.

Conclusion

AOC cable achieves high data rates over long reaches interconnection, which is the best solution for data centers and high-performance computing applications. Sun Telecom specializes in providing one-stop total fiber optic solutions for all fiber optic application industries worldwide. Contact us if any needs.

[fibermarts]

QSFP Cable and Connectors Assemblies

A quad (4-channel) Small Form-factor Pluggable Optics Transceiver is also known as a QSFP cable. For applications requiring 40 Gigabit Ethernet (40GbE) data transfers, it is a small, hot-pluggable fiber optical transceiver. They are often used for the implementation of 40G Ethernet, Infiniband, and other communications protocols in data centers.

It connects a fiber optic or copper cable to network equipment, such as a switch, router, media converter, or similar device.

In addition to copper cable media, QSFP+ optic transceivers are made to support Serial Attached SCSI, 40G Ethernet, 20G/40G Infiniband, and other fiber optic communication standards. In comparison to SFP+ optic modules, the QSFP28 cable significantly increases port density by 4x.

Optical transceivers are compact, strong devices that add fiber ports to switches or other networking equipment by connecting them to copper or fiber optic cables. Data is transmitted using optical fiber in conjunction with fiber optics in the form of light pulses that travel at very high speeds and can cover very long distances. The transceiver, which is a laser with a certain wavelength that transforms electrical signals into optical signals, is a crucial part of the fiber optic network. The data is then converted into a signal with a specific wavelength by the transceiver and sent over the optical fiber. Wideband signals are those that are 850 nm, 1310 nm, and 1550 nm in wavelength. Narrow bands are the term for CWDM or DWDM signals. Each channel is unable to interact with the others due to the special property of light.

This indicates that a network can handle the transmission of both wideband and narrowband signals. Direct attach copper (DAC), active optical cables (AOC), optical modules, and active copper cables are all types of QSFP interconnects (ACC). The least costly choice is DACs. They offer a connection that depends on host signal processing. The maximum length that can be achieved depends on the cable assembly's insertion loss, which is determined by its length and cable gauge and is guided by the IEEE specifications (see below) (AWG). The AWG of a wire has an inverse relationship with its size. AWG and wire diameter for QSFP cable assemblies are plotted in the table below.

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What is SFP+ Direct Attach Copper Cable?

What is SFP+ Direct Attach Copper Cable?

 Direct Attach Copper, referred to as DAC.It is including two kinds: 1.SFP+ DAC 10G; 2.QSFP+ 40G turns 4 SFP+. This cable can not replace the port, can only be replaced together with the product line, the module head and the copper can not be separated.Today we will introduce the SFP+ DAC cable,mainly to talk about what is SFP+ DAC Cable? We will also talk about its features and…

[and-systems]

✅ Кабели DAC 🌀 Альтернативой оптическим SFP и QSFP модулям, или-же трансиверам служат кабели DAC Их применяют в случаях, когда требуется соединить расположенное на небольшом расстоянии оборудование. Рассмотрим их назначение подробнее в данной статье. ✔️ Кабели DAC — что это и зачем В терминологии DAC полностью звучит как Direct Attach Copper Cable. В перевод�� с английского означает — «кабель для прямого медного подключения». Иными словами, это твинаксиальный кабель-переходник, предназначенный для соединения коммутаторов с серверами. Такого типа соединитель представляет собой экранированный медный коаксиальный или волоконно-оптический шнур, имеющий ограниченную длину и оснащенный закрепляющими трансиверами с обоих концов. Отметим, что трансиверы в этом случае могут быть разного формата — от SFP до QSFP28. Что касается длины проводника, то при внутренних соединениях ее показатель чаще всего находится в диапазоне от 1 до 20 метров. ✔️ Типы DAC проводников Отличительным параметром кабелей прямого подключения выступает длина. В основном они разделяются на два типа: 🔸 Пассивные 🔸 Активные Первый тип проводника выглядит как твинаксиальный кабель, который напрямую соединяется с РСВ трансивера, расположенного на его окончании. Длина такого переходника может достигать 7-ми метров (для 10G кабеля). Но во избежание рисков относительно стабильного функционирования проводника, многие производители не изготавливают их больше 3-ех метров. В свою очередь второй тип DAC кабелей представляют собой переходник с лазерным блоком, который соединен с РСВ. Таким образом, длина соединителя максимально достигает 20-ти метров для 10G кабеля и 3 метров для 100G кабеля. Отметим, что DAC проводники еще отличаются диаметром сечения токопроводящей жилы. Данный показатель характеризуется в AWG единицах. Соответственно, от AWG зависит максимальный уровень длины переходника. То есть, когда происходит увеличение длины, то одновременно повышается вносимое затухание. ⤵️ Полный текст в блоге AND-Systems: http://amp.gs/jliJR #andsystems #andpro #андсистемс #твинаксиальныйкабель #кабельдляпрямогомедногоподключения #кабелиdac

[priyablog26]

Direct Attach Cable Market Technologies,Applications, End Users, Global Industry Analysis, Size, Share, Growth, Trends, and Forecast 2020- 2027

Direct attach cable (DAC) is defined as the cable which connects directly to the ports or line cards. The increase in adoption of direct attach cable for the data storage is boosting the growth of the direct attach cable market., The benefits provided  by the direct attach cable like  bandwidth capacity, high security, high speed, and reliability are also drive  the growth of the direct attach cable market.

The key operating players in the Global Direct Attach Cable Market are also profiled in detail in the report to offer readers with a complete understanding of the competitive landscape of the target market. Major competitive strategies employed by key operating players in the market are described in detail, so that readers can get an accurate image of what is working in the market & what is likely to bring them sustained success. Along with this, the report also of serves the readers with a handy guide to what to avoid in the Direct Attach Cable Market & remain free from the major concerns plaguing the key players.

 Sample Copy of This Report @ https://qualiketresearch.com/request-sample/Direct-Attach-Cable-Market/request-sample

 Direct Attach Cable Market Key Competitors

Various key players are discussed in this report such as 3M, Tripp Lite, TE Connectivity Ltd., Panduit, Nexans S.A, Molex, Juniper Networks, Inc., Hitachi, Ltd., Cisco Systems, Inc., Arista Networks, Inc., etc.

  Direct Attach Cable Market Taxonomy

By Product Type

Direct Attach Copper     Cables

Active Optical Cables

By Form

QSFP

CXP

CX4

CFP

CDFP

 By End User

Data Storage

Telecommunications

Networking

High Performance     Computing Centers

Others

By Region

North America

Latin America

Europe

Asia Pacific

Middle East &     Africa

  Get full Study @ https://qualiketresearch.com/reports-details/Direct-Attach-Cable-Market

About Us

QualiKet Research is a leading Market Research and Competitive Intelligence partner helping leaders across the world to develop robust strategy and stay ahead for evolution by providing actionable insights about ever changing market scenario, competition and customers. QualiKet Research is dedicated to enhancing the ability of faster decision making by providing timely and scalable intelligence. We use different intelligence tools to come up with evidence that showcases the threats and opportunities which helps our clients outperform their competition. 

[welcomecboit]

The modern data center consists of high-speed connectivity to customers throughout the world as well as flawless, high-flow media. Data enter vendors should maximize the density of optical transceiver ports on their Ethernet switches in order to offer a low-cost solution for connecting switches. DAC stands for direct attach a copper cable for 100G QSFP28. In addition, there is a 100G QSFP28 Copper Cable and an Ethernet DAC that can handle 100G. This cable is sometimes known as 100GBASE-CR4 QSFP cable. Each copper pair can transmit data at speeds of up to 25GbE per socket. QSFP28 cable assemblies are therefore suited for space-saving connectivity in data centers, networks, and high-performance computing applications.

 ·         Read the full article here:

https://www.cbo-it.de/en/blog/transceiver/qsfp-and-qsfp28-transceivers-cabling-solutions.html

[hound-dog-development]

AddOn Cisco QSFP-H40G-CU5M to Arista Networks CAB-Q-Q-5M Compatible TAA Compliant 40GBase-CU QSFP+ to QSFP+ Direct Attach Cable (Passive Twinax, 5m)

AddOn Cisco QSFP-H40G-CU5M to Arista Networks CAB-Q-Q-5M Compatible TAA Compliant 40GBase-CU QSFP+ to QSFP+ Direct Attach Cable (Passive Twinax, 5m)

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Direct Attach Cable VS. Active Optical Cable

Direct attach cable (DAC) and active optical cable (AOC) is crucial high-speed interconnect cabling solutions in data centers and high-performance computing applications. DAC and AOC cables are plug-and-play, allowing the users to optimize the existing network without new optical fiber cabling. This article will discuss the differences between DAC and AOC cables.

DAC Cable VS. AOC Cable

DAC cable consists of a Twinax copper cable terminated with SFP+/SFP28/QSFP+/QSFP56/QSFP28 connectors on both ends, which can provide an electrical connection directly to active equipment. DAC cable can be passive or active. Passive and active DAC cables can transmit electrical signals directly over copper cables. The passive DAC cable can deliver without signal conditioning, while the active DAC cable has electric components inside the transceivers to boost signals. AOC cable consists of a multi-mode fiber optic cable terminated with SFP connectors on both ends, which requires external power to complete the conversion of electric and optical signals, from electric signals to optical ones, and then convert to electric signals finally.

DAC and AOC cables differ from each other in the following aspects :

1. Power Consumption

Usually, the power consumption of an AOC cable is higher than a DAC cable, which is 1-2w. While the power consumption of active DAC cables is less than 1w, and the passive DAC cables cost nearly no power consumption at the value of lower than 0.15w due to the thermal design of DAC cables. As a result, the operating expenses on power consumption will be decreased when adopting the DAC options.

2. Transmission Distance

AOC cable can transmit over longer distances up to 100 m, while DAC cable link length limit is 10 m (passive DAC: 7 m; active DAC: 10 m). To sum up, DAC cable is suitable for short-range transmissions, while AOC cable is used for long-range transmissions.

Note: the max. distance of a signal that can be transmitted via a DAC cable changes depending on the data rate. The link length will decrease as the data rate grows, for example, 100G DAC cables can only transmit up to 5 meters.

3. Cost

In general, copper cables are much cheaper than fiber cables. When implemented in the high-density data center, the sum of money will be saved for large quantities of DAC cable compared to AOC cable.

4. Electromagnetic Interference Immunity

AOC cable is immune to electromagnetic interference, while DAC cable is vulnerable to the effect of electromagnetic interference, such as unwanted responses, degradation, or complete system failure.

5. Application

DAC cable is used to connect switches/servers to switches within racks and adjacent racks. In other words, DAC cable is used as an alternative for ToR (top of rack) interconnections between the ToR switch and server or the stacking of switches.

AOC Cable is used to connect ToR switches to EoR (end-of-row) aggregation switches, and to connect the ToR switch with MoR (middle-of-row) storage subsystems at reaches greater than DAC cable limits of 3-7 meters.

Conclusion

DAC and AOC cables are simple, cost-effective cabling solutions that are designed for the same ports as SFP+ or QSFP transceivers. DAC cable use copper-based cabling while AOC cable use fiber-based cabling. DAC cable provides lower power consumption and is cheaper than AOC cable. However,  AOC cable provides long transmission distances than DAC cable. Sun Telecom specializes in providing one-stop total fiber optic solutions for all fiber optic application industries worldwide. Contact us if any needs.

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What is Direct Attached Cables(DAC)

What is Direct Attached Cables(DAC)

Direct Attach Cables(DAC) are a form of shielded high-speed cable with SFP connectors on either end (SFP, SFP+, QSFP, QSFP+ modules). These are generally used to connect switches to routers, storage or servers within the same rack or adjacent racks. DAC cables are becoming increasingly popular, not just within data centers but within wider areas of the industry, as they offer a very…