Tag Archives: 40GBASE-LR4

Things to Know about 40GBASE-SR4 QSFP+ Modules

With the growing demand for high data rates, 40 Gigabit Ethernet (GbE) is now becoming more and more widely adopted. For a 40 GbE network application, precise connectivity is crucial. 40G QSFP (quad small form factor pluggable) portfolio offers customers a wide variety of high-density and low-power 40 Gigabit Ethernet connectivity options. Among them, 40GBASE-SR4 QSFP+ transceiver is a common 40 GbE connectivity option. And here are some things that you need to know about 40GBASE-SR4 QSFP+ transceivers.

Introduction

40GBASE-SR4 is a fiber optic interface for multimode fiber of OM classes 3 and 4 with four parallel OM3 or OM4 fibers in both directions. “S” means short, indicating that it is an interface for short distances. The “R” denotes the type of interface with 64B/66B encoding and the numeral 4 indicates that the transmission is carried out over a ribbon fiber with four multimode fibers in every direction. Each lane has a 10 Gbit/s data rate. 40GBASE-SR4 QSFP+ modules usually use a parallel multimode fiber (MMF) link to achieve 40G. It offers 4 independent transmit and receive channels, each capable of 10G operation for an aggregate data rate of 40G over 100 meters of OM3 MMF or 150 meters of OM4 MMF. It primarily enables high-bandwidth 40G optical links over 12-fiber parallel fiber terminated with MPO/MTP multifiber female connectors.

40GBASE-SR4 QSFP+ module can also be used in a 4x10G mode for interoperability with 10GBASE-SR interfaces up to 100 and 150 meters on OM3 and OM4 fibers, respectively. The worry-free 4x10G mode operation is enabled by the optimization of the transmit and receive optical characteristics to prevent receiver overload or unnecessary triggering of alarm thresholds on the 10GBASE-SR receiver, and at the same time is completely interoperable with all standard 40GBASE-SR4 interfaces. The 4x10G connectivity is achieved using an external 12-fiber parallel to 2-fiber duplex breakout cable, which connects the 40GBASE-SR4 module to four 10GBASE-SR optical interfaces. The picture below shows a Mellanox MC2210411-SR4 compatible 40GBASE-SR4 QSFP+ transceiver.

Mellanox MC2210411-SR4 Compatible 40GBASE-SR4 QSFP+ Transceiver

40GBASE-SR4 QSFP+ Module vs 40GBASE-CSR4 QSFP+ Module

40GBASE-CSR4 QSFP+ module is similar to the 40GBASE-SR4 interface extends supported link lengths to 300m and 400m respectively on laser-optimized OM3 and OM4 multimode fiber cables. Each 10-gigabit lane of this module is compliant to IEEE 10GBASE-SR specifications. This module can be used for native 40G optical links over 12-fiber ribbon cables with MPO/MTP connectors, or in 4x10G mode with ribbon to duplex fiber breakout cables for connectivity to four 10GBASE-SR interfaces. Maximum channel insertion loss allowed is respectively 2.6dB over 300m of OM3 cable or 2.9dB over 400m of OM4 cable.

Conclusion

Fiberstore offers you a wide variety of 40GBASE-SR4 QSFP+ transceivers for your high-density and low-power 40 Gigabit Ethernet connectivity options branded by many famous companies like Cisco, Juniper or HP. And we also provide other compatible 40G QSFP+ transceivers, such as 40GBASE-LR4 QSFP+ transceiver, 40GBASE-ER4 QSFP+ transceiver, 40GBASE-CSR4 QSFP+ transceiver, etc. Every fiber optic transceiver provided by Fiberstore has been tested to ensure its compatibility and interoperability. You can buy from us with confidence.

Transceiver Solutions for Migrating to 40G Network

As the need for increased network bandwidth to meet the global IP traffic demand is growing rapidly, there is an urgent need for upgrading to 40G Ethernet links in data centers. And the IEEE 802.3ba committee has already ratified the 40 Gigabit Ethernet standard and along with the general specification, defining a number of fiber optic interfaces. These standard interfaces attempted to satisfy a number of different objectives including support for multi-mode fiber (MMF) and single mode fiber (SMF) compatibility. Therefore, there appears various transceiver solutions for migrating to 40G Ethernet network. Among these solutions, there are three popular ones: 40G LR4 QSFP+ transceiver, 40G SR4 QSFP+ transceiver and 40G QSFP+ BiDi transceiver. This article will give a comprehensive comparison on them.

40G LR4 QSFP+ Transceiver

40G LR4 QSFP+ transceivers are hot-swappable Ethernet optical transceivers that support high-speed serial links over single mode optical fiber. With built-in optical multiplexing and de-multiplexing, this kind of transceiver has four channels of 10G multiplexed/de-multiplexed inside the module to transmit and receive an aggregate 40G signal over a single pair (2 strands) of fiber. Used with LC connectors and single mode fiber, 40G LR4 QSFP+ transceivers’ transmission distance can cover around 10km.

As 40G LR4 QSFP+ transceivers can be used together with LC connectors, they may use existing duplex fiber infrastructure for 40G migration. That’s to say, 40G LR4 QSFP+ transceivers can offer a very cost effective connectivity solution and unique value proposition for data centers to migrate from 10G to 40G Ethernet network with minimal disruption with existing fiber optical infrastructure. The main disadvantage of 40G LR4 QSFP+ transceivers is that the optical link may not be as simple as that of 40G LR4 QSFP+ transceivers. The following is a picture of Finisar FTL4C1QE1C compatible 40GBASE-LR4 QSFP+ transceiver.

Finisar FTL4C1QE1C Compatible 40GBASE-LR4 QSFP+ Transceiver

40G SR4 QSFP+ Transceiver

40G SR4 QSFP+ transceivers are parallel fiber optical module with four independent optical transmit and receive channels. Each of these channels is capable of a 10G operation for an aggregate data rate of 40G. These transceivers use MTP/MPO connectors and require multi-mode OM3 or OM4 cables. They can support with a link length up to 100 meters on OM3 cable and 150 meters on OM4 cable.

40G SR4 QSFP+ transceivers use fundamentally different connectivity formats, requiring fiber cabling infrastructure to be redesigned and replaced. Thus, they cannot reuse aggregation fiber infrastructure built for 10-Gbps connectivity. The following is a picture of Cisco QSFP-40G-SR4 compatible 40GBASE-SR4 QSFP+ transceiver.

Cisco QSFP-40G-SR4 Compatible 40GBASE-SR4 QSFP+ Transceiver

40G QSFP+ BiDi Transceiver

40G QSFP+ BiDi transceivers are the lasted products used in 40G transmission. They are transceivers that transmit full-duplex 40-Gbps traffic over one dual-fiber LC-connector OM3 or OM4 MMF cable. 40G QSFP+ BiDi transceivers have two 20Gbps channels, each transmitted and received simultaneously over two wavelengths on a single MMF strand. The result is an aggregated duplex 40Gbps link over a MMF duplex LC-terminated fiber cable. The connection can reach 100 meters on OM3 MMF or 150 meters on OM4 MMF, which is the same as 40Gbps SR4. The following figure shows the technology concept of the Cisco QSFP BiDi transceiver.

QSFP BiDi transceiver

To accommodate an ever increasing spectrum of 40 Gigabit Ethernet applications, Fiberstore offers various 40GBASE QSFP+ transceiver types, suitable for different media and distance reaches. All of our QSFP+ transceivers are tested in-house prior to shipping to ensure that they will arrive in perfect physical and working condition. We offer our customers with high-performance and cost-effective products to fulfill their requirements, contributing this way to the customer’s success and satisfaction.

The Basics of 40GBASE-LR4 QSFP+ Transceiver

40GBASE QSFP+ (quad small form factor pluggable) portfolio offers customers a wide variety of high-density and low-power 40 Gigabit Ethernet connectivity options for data center, high-performance computing networks, enterprise core and distribution layers, etc. And each kind of 40GBASE QSFP+ transceiver has its special applications. 40GBASE-LR4 QSFP+ transceiver is a common 40 Gigabit Ethernet connectivity option. Here is some basic information about 40GBASE-LR4 QSFP+ transceiver.

Introduction

40GBASE-LR4 QSFP+ module supports link lengths of up to 10 kilometers over a standard pair of G.652 single-mode fiber with duplex LC connectors. The 40 Gigabit Ethernet signal is carried over four wavelengths. Multiplexing and demultiplexing of the four wavelengths are managed within the device. The letter “L” stands for long, the “R” denotes the type of interface with 64B/66B encoding and the numeral 4 indicates numeral 4 indicates that the transmission is carried out over a ribbon fiber with four singlemode fibers in every direction. Each lane has a 10 Gbit/s data rate. 40GBASE-LR4 QSFP+ transceiver modules are compliant with the QSFP+ MSA and IEEE 802.3ba 40GBASE-LR4. The picture below shows a Mellanox MC2210511-LR4 compatible 40GBASE-LR4 QSFP+ transceiver.

Mellanox MC2210511-LR4 Compatible 40GBASE-LR4 QSFP+ Transceiver

Two Types of 40GBASE-LR4 QSFP+ Transceiver

There are mainly two of 40GBASE-LR4 QSFP+ transceivers, 40GBASE-LR4 CWDM (coarse wavelength division multiplexing) QSFP+ transceiver and 40GBASE-LR4 PSM (parallel single-mode fiber) QSFP+ transceiver. This part mainly talks about these two 40GBASE-LR4 QSFP+ transceiver types.

40GBASE-LR4 CWDM QSFP+ transceiver, such as QSFP-40GE-LR4, contains a duplex LC connector for the optical interface. It can support transmission distance of up to 10km. A 40GBASE-LR4 CWDM QSFP+ transceiver converts 4 inputs channels of 10G electrical data to 4 CWDM optical signals by a driven 4-wavelength distributed feedback (DFB) laser array, and multiplexes them into a single channel for 40G optical transmission. Then the receiver module accepts the 40G CWDM optical signals input, and demultiplexes it into 4 individual 10G channels with different wavelengths.

40GBASE-LR4 PSM QSFP+ transceiver is a parallel single-mode optical transceiver with an MTP/MPO fiber ribbon connector. It also offers 4 independent transmit and receive channels, each capable of 10G operation for an aggregate data rate of 40G. The transmitter module accepts electrical input signals compatible with common mode logic (CML) levels. All input data signals are differential and internally terminated. The receiver module converts parallel optical input signals via a photo detector array into parallel electrical output signals. The receiver module outputs electrical signals are also voltage compatible with CML levels.

Applications

QSFP-40GE-LR4 supports 40GBASE Ethernet rate only, whereas the QSFP-40G-LR4 supports OTU3 data rate in addition to 40GBASE Ethernet rate. 40GBASE-LR4 QSFP+ transceivers are most commonly deployed between data-center or IXP sites with single mode fiber.

Fiberstore offers customers a wide variety of 40GBASE-LR4 QSFP+ transceivers for your high-density and low-power 40 Gigabit Ethernet connectivity options, including 40GBASE-LR4 CWDM QSFP+ transceiver and 40GBASE-LR4 PSM QSFP+ transceiver, like Cisco QSFP-40GE-LR4 40GBASE-LR4 QSFP+ transceiver. Fiberstore also provides wide brand compatible 40G QSFP+ transceivers, such as Brocade QSFP+, Dell QSFP+, Juniper QSFP+, Mellanox QSFP+, and HP QSFP+. Each fiber optic transceiver provided by Fiberstore has been tested to ensure its compatibility and interoperability. Please rest assured to buy.

Cisco 40GBASE QSFP+ Modules

Cisco 40GBASE QSFP+ (quad small form-factor pluggable plus) modules offer customers a wide variety of high-density and low-power 40 Gigabit Ethernet connectivity options for data center, high-performance computing networks, enterprise core and distribution layers, and service provider transport applications. In this post, several different kinds of conectivity options provided by Cisco will be introduced.

Features and Benefits of Cisco 40GBASE QSFP+ Module

Main features of Cisco 40GBASE QSFP+ modules include:

  • Interoperable with other IEEE-compliant 40GBASE interfaces
  • Hot-swappable input/output device that plugs into a 40 Gigabit Ethernet QSFP+ Cisco switch port
  • High-speed electrical interface compliant to the IEEE 802.3ba standard
  • Compliant to SFF 8436 and QSFP Multisource Agreement (MSA)
Cisco QSFP-40G-SR4-S

Cisco 40GBASE-SR4 QSFP+ module supports link lengths of 100m and 150m respectively on laseroptimized OM3 and OM4 multimode fiber cables. It primarily enables high-bandwidth 40G optical links over 12-fiber ribbon r cables terminated with MPO/MTP multi-fiber connectors. It can also be used in 4x10G mode along with ribbon to duplex fiber breakout cables for connectivity to four 10GBASE-SR optical interfaces. Cisco QSFP-40G-SR4-S is optimized to guarantee interoperability with any IEEE-compliant 40GBase-SR4 module.

Cisco QSFP-40G-CSR4

Cisco 40GBASE-CSR4 QSFP+ module extends the reach of the IEEE 40GBASE-SR4 interface to 300m and 400m respectively on laser-optimized OM3 and OM4 multimode fiber cables. Each 10-gigabit lane of this module is compliant to IEEE 10GBASE-SR specifications. This module can be used for native 40G optical links over 12-fiber ribbon cables with MPO/MTP connectors, or in a 4x10G mode with ribbon to duplex fiber breakout cables for connectivity to four 10GBASE-SR interfaces. The following picture shows a Cisco QSFP-40G-SR4-S QSFP+ module and a Cisco QSFP-40G-CSR4 QSFP+ module.

QSFP-40G-SR4-S QSFP+ and QSFP-40G-CSR4 QSFP+

Cisco QSFP-40G-LR4-S

Cisco 40GBASE-LR4 QSFP module supports link lengths of up to 10 km over a standard pair of G.652 single-mode fiber with duplex LC connectors. QSFP-40G-LR4-S module supports 40GBase Ethernet rate only. 40 Gigabit Ethernet signal is carried over four wavelengths. Multiplexing and demultiplexing of the four wavelengths are managed in the device. QSFP-40G-LR4-S does not support FCoE.

Cisco WSP-Q40GLR4L

Cisco WSP-Q40GLR4L QSFP+ module supports link lengths of up to 2 km over a standard pair of G.652 single-mode fiber (SMF) with duplex LC connectors. 40 Gigabit Ethernet signal is carried over four wavelengths. It is interoperable with 40GBase-LR4 for distances up to 2 kilometers. The following picture shows a Cisco QSFP-40G-LR4-S QSFP+ module and a Cisco WSP-Q40GLR4L QSFP+ module.

QSFP-40G-LR4-S QSFP+ and WSP-Q40GLR4L QSFP+

Cisco QSFP+ Copper Direct Attach Cables (DACs)

Cisco QSFP+ copper DACs include QSFP+ to QSFP+ copper DACs and QSFP+ to 4SFP+ copper DACs. Cisco QSFP+ copper DACs are suitable for very short distances and offer a very cost-effective way to establish a 40-gigabit link between QSFP+ ports of Cisco switches within racks and across adjacent racks. QSFP+ to 4SFP+ copper breakout DACs cables connect to a 40G QSFP+ port of a Cisco switch on one end and to four 10G SFP+ ports of a Cisco switch on the other end.

Cisco QSFP+ Active Optical Cables (AOCs)

Cisco QSFP+ AOCs include QSFP+ to QSFP+ AOCs and QSFP+ to 4SFP+ AOCs. Active optical cables are much thinner and lighter than copper cables, which makes cabling easier. Active optical cables enable efficient system airflow and have no electromagnetic interference (EMI) issues, which is critical in high-density racks.

Fiberstore is a professional manufacturer and supplier for optical fiber products and provides various kinds of 40GBase QSFP+ transceivers branded by many famous companies. Cisco QSFP+ transceivers offered by Fiberstore are the most cost-effective standards-based QSFP+ modules fully compatible with Cisco switches and routers. They are 100% compatible with major brands and backed by a lifetime warranty.

Cabling Connectivity Options for 40Gbps Infrastructure

Driven by growing bandwidth and network performance demand, data center network infrastructure is witnessing a transformation. The speed of data center now is increasing to 40 Gbps. Thus, new cabling infrastructure and cabling connectivity options are required. Here some commonly used cabling connectivity options for 40Gbps infrastructure will be introduced in this post.

Pluggable Modules: 40G QSFP+ Transceivers

Fiber optic transceiver is an electronic device that receives an electrical signal, converts it into a light signal, and launches the signal into a fiber. It also receives the light signal, from another transceiver, and converts it into an electrical signal. It is the key component in fiber optic transmission. The basic interface of 40G pluggable optical modules are 40GBASE-LR4 and 40GBASE-SR4 QSFP+ form factor.

40GBASE-LR4 QSFP+: 40GBASE-LR4 transceiver support with a link length up to 10 km over 1310nm single-mode fiber. It is most commonly deployed between data centers or IXP sites. The image below shows a Cisco QSFP-40G-LR4 compatible 40GBASE-LR4 QSFP+ transceiver.

Cisco QSFP-40G-LR4 Compatible 40GBASE-LR4OTU3 QSFP+ Transceiver

40GBASE-SR4 QSFP+: 40GBASE-SR4 transceivers are used in data centers to interconnect two Ethernet switches with 8 fiber parallel multimode fiber OM3/OM4 cables. It can support transmission distance up to 100 m with OM3 fiber and 150 m with OM4 fiber. The optical interface of 40GBASE-SR4 QSFP+ is MPO/MTP. The image below shows a Cisco QSFP-40G-SR4 compatible 40GBASE-SR4 QSFP+ transceiver.

Cisco QSFP-40G-SR4 Compatible 40GBASE-SR4 QSFP+ Transceiver

In addition, for single-mode fiber transmission, there are 40GBASE-LR4 Parallel Single Mode (PSM) transceivers which are used to provide support for up to four 10Gbps Ethernet connections on a QSFP+ port over single mode fiber at distances up to 10 km. For multimode fiber transmission, QSFP+ extended SR4 transceivers are developed which is designed with optimized VCSEL with better performance of RMS spectral width compared with QSFP+ SR4. QSFP+ extended SR4 transceivers can support transmission distance up to 300 m with OM3 fiber and 400 m with OM4.

Passive & Active Direct Attach Copper Cables

The QSFP+ passive or active direct attach copper cables are designed with twinax copper cable and terminated with QSFP+ connectors. The main difference between passive QSFP+ DAC and active QSFP+ DAC is that the passive one is without the active component. They provide short distance inexpensive connectivity at up to 40Gbps rates and operate 4 independent 10G channels using the QSFP connector footprint. Each of the four channels can operate at multi-rate speeds Gigabit to 10Gbps. The image below shows QSFP-4SFP10G-CU1M compatible QSFP+ to 4SFP+ passive breakout copper cable.

Cisco QSFP-4SFP10G-CU1M Compatible QSFP+ to 4SFP+ Passive Breakout Copper Cable

Active Optical Cable (AOC) Assemblies

Active optical cable uses electrical-to-optical conversion on the cable ends to improve speed and distance performance of the cable without sacrificing compatibility with standard electrical interfaces. QSFP+ AOC is a high performance integrated cable for short-range multi-lane data communication and interconnect applications, for it provides light weight, high performance, low power consumption, low interconnection loss, EMI immunity and flexibility. QSFP+ AOC supports InfiniBand QDR/DDR/SDR, Ethernet (10 and 40Gbps), Fibre Channel (8 and 10 Gbps), SAS and other protocol applications. And hot-pluggable transceiver allows insertion and removal of devices without powering down the system. The image below shows QSFP-4X10G-AOC10M compatible QSFP+ to 4SFP+ active optical breakout cable.

Cisco QSFP-4X10G-AOC10M Compatible QSFP+ to 4SFP+ Active Optical Breakout Cable

Fiberstore offers a comprehensive solution for 40G fiber optic cabling connectivity. We support a full range of both copper cables and optical transceivers for 40GbE, compliant to the IEEE standards. For copper both QSFP+ to QSFP+ (40G to 40G) and QSFP+ to SFP+ (40G to 4x10G) cables enable short reach options. For longer distances Fiberstore offers a wide range of optical transceivers for various fiber types and reach requirements.

Upgrading to 40/100 Gigabit Ethernet

To support the changing and fast-growing bandwidth demands of data centers (DCs), the IEEE ratified standards for supporting 40 Gigabit Ethernet (40GE) and 100 Gigabit Ethernet (100GE), known as IEEE 802.3ba. 40GE and 100 GE belong to a family of network technologies that primarily are used in local area networks. As they are becoming more and more popular, it is very necessary to know more about them. This post offers a quick-reference guide to increase your familiarity with issues in the migration to 40 and 100GE systems.

Cabling Systems

Both 40 and 100 Gigabit Ethernet can be deployed using the same cabling systems in use today. Multi-mode will employ parallel optics using MPO interconnects and require additional cable infrastructure depending on the system deployed while single mode fiber will employ serial transmission and use LC or SC connectors. The approach used for the higher speed data rates is based on advanced transceiver technologies engineered to take advantage of the full bandwidth of laser optimized fibers. Both single mode fiber (SMF) and multi-mode fiber (OM3, OM4) were approved in the standard.

Standards
  • 40GBase-SR4: multimode fiber with four fiber pairs (OM3/OM4)
  • 40GBase-LR4: single-mode fiber pairs with 4 wavelengths a 10Gbit/s at 10 km
  • 40GBase-KR4: short distances in the backplane (4 pairs of wires)
  • 40GBase-CR4: twinax cable with 4 pairs
  • 100GBase-CR10: twinax cable with 10 pairs
  • 100GBase-SR10: multimode fiber with 10 fiber pairs (OM3/OM4)
  • 100GBase-SR10: single-mode fiber pairs with 4 wavelengths a 25Gbit/s at 10 km
  • 100GBase-ER4: single-mode fiber pairs with 4 wavelengths a 25Gbit/s at 40 km
Module Types

QSFP: The QSFP (quad small-form-factor pluggable) is the primary way of delivering 40GE and are now appearing in 100GbE-capable form. These present either MPO connectors for multi-mode optics or LC connectors for single-mode optics. It is similar in size to the CXP and provides four transmit and four receive lanes to support 40GbE applications. QSFP+ (quad small form-factor pluggable plus), as the updated version of QSFP, is a new multi-source agreement (MSA) for high speed application. QSFP+ gradually replace QSFP and is widely used by people as it can provide higher bandwidth. The following picture shows an Avaya AA1404001-E6 compatible QSFP+ transceiver.

Avaya AA1404001-E6 Compatible 40GBASE-LR4 QSFP+ Transceiver

CFP: The CFP (C form-factor pluggable) transceiver features twelve transmit and twelve receive 10Gb/s lanes to support one 100GbE port, or up to three 40GbE ports. CFP form factor optics are available in 40GbE and 100GbE varieties. Its larger size is suitable for the needs of single-mode optics and can easily serve multi-mode optics or copper as well. These present MPO connectors for multi-mode optics or SC connectors for single-mode optics. CFP modules use the 10-lane CAUI-10 electrical interface.

CFP2: The CFP2 is an evolution of the existing CFP form factor, using manufacturing and optics advances to reduce the size of the module to approximately half that of the original CFP, allowing for higher interface density. CFP2 modules use the 10-lane CAUI-10 electrical interface or the 4-lane CAUI-4 electrical interface.

Requirements and Objectives

40GE and 100GE fulfill the following requirements and objectives:

  • Preserve existing 802.3 frame format, minimum size, and maximum size.
  • Support high-speed switching, routing, and application functions in data centers.
  • Exhibit a bit error rate (BER) of 10-12 or better.
  • Provide support for optical transport network (OTN).
  • Provide specifications for operation over single-mode optical fiber, laser optimized multimode optical fiber, copper cables, and backplanes.
  • Support high-bandwidth applications such as video on demand (VoD) and high-performance computing (HPC).

The throughput and reliability of a 40/100 Gigabit Ethernet installation is directly related to the cabling, the choice of connectivity, and proper installation. Fiberstore’s superior cable and connectivity designs provides you with superior levels of performance and operation. We offer all kinds of cables and transceiver modules for your applications, such as Dell Force10 GP-QSFP-40GE-1SR 40GBASE-SR4 QSFP+ transceiver, or Juniper QFX-QSFP-DAC-3M compatible QSFP+ to QSFP+ passive copper cable, and so on. You can buy from us with confidence.

Introduction to QSFP+ Transceiver Module

Transmission speeds are continuing to rise as consumers demand ever higher performance from a variety of communications devices. If you are thinking about upgrading your server network connections, you may want to know about an emerging plug standard called QSFP+, which is now widely used by people as it can provide high bandwidth. Here is what you need to know about QSFP+ transceiver modules.

What Is QSFP+ Transceiver Module?

To know what a QSFP+ transceiver is, you need to understand QSFP transceiver first. QSFP (quad small form-factor pluggable) is a compact, hot-pluggable transceiver used for data communications applications. It interfaces networking hardware to a fiber optic cable or active or passive electrical copper connection. It is an industry format jointly developed and supported by many network component vendors, allowing data rates from 4×10 Gbit/s. The format specification is evolving to enable higher data rates. The QSFP specification accommodates Ethernet, Fibre Channel, InfiniBand and SONET/SDH standards with different data rate options. QSFP+ (quad small form-factor pluggable plus), as the updated version of QSFP, is a new multi-source agreement (MSA) for high speed application, such as 40G-BASE, which provide four channels of data in one pluggable interface. Each channel is capable of transferring data at 10Gbps and supports a total of 40Gbps. QSFP+ gradually replace QSFP and is widely used by people as it can provide higher bandwidth. QSFP modules increase the port-density by 3x-4x compared to SFP+ modules. The following picture shows a Juniper QSFPP-40GBASE-LR4 compatible 40GBASE-LR4 QSFP+ transceiver module.

Juniper QSFPP-40GBASE-LR4 Compatible 40GBASE-LR4 QSFP+ Transceiver

Key Features of QSFP+ Transceiver
  • 4 channels in one interface, providing 3 to 4x density of, SFP+ and XFP
  • Meets QSFP+ requirements up to 10 Gbit/s per channel, total 40G interface
  • Cages accommodate belly-to-belly mounting
  • Heat sinks and lightpipes available
  • Compliant with QSFP+ MSA and IEEE Standard 802.3ba
  • Quick release latching system
  • Low power dissipation
Installing a QSFP+ Transceiver

Perform the following procedure to install an QSFP+ transceiver:

  • 1. Remove the module from its shipping container and store the packaging material in a safe location.
  • 2. Remove the dust cover from the chassis QSFP+ slot.
  • 3. If you are installing the transceiver in the top QSFP+ slot, position the transceiver with the handle facing up. If you are installing the transceiver in the bottom slot, position the transceiver with the handle facing down.
  • 4. Slide the module into the slot until it clicks into place.
  • 5. Repeat steps 1 to 4 if you have other QSFP+ transceivers to install.

If you are ready to attach the fiber optic cable to the transceiver, continue with removing the dust cover from the transceiver, and then inserting the fiber optic cable to the port on the transceiver, until it clicks in place. Otherwise, repeat steps 1 to 4 to install the remaining QSFP+ transceiver(s) in the line cards. Do not remove the dust cover from the installed QSFP+ transceiver until you are ready to install the fiber optic cable.

Applications of QSFP+ Transceiver

QSFP+ is the I/O cable form factor approved for use in data center applications including InfiniBand and 40G Ethernet. The 40Gbps QSFP+ transceiver is well suited for 40GBASE-SR4 and 40GBASE-LR4 applications. It combines the higher density attractions of parallel modules with some of the key advantages normally associated with SFP+ based modules. It is intended for use short reach applications in switches, routers and data center equipment where it provides higher density and lower cost when compared with standard SFP+ modules. And, QSFP+ transceivers are designed to carry Serial Attached SCSI, QDR (40G) and FDR (56G) Infiniband, and other communications standards. The QSFP+ transceiver is the dominant transceiver form factor used for 40 Gigabit Ethernet applications.

Fiberstore offers you a large number of QSFP+ transceiver modules branded by many famous companies, like Cisco, Juniper, HP, and Finisar. For example, Cisco QSFP-40G-SR4-S 40GBASE-SR4 QSFP+ transceiver, Finisar FTL410QD2C 40GBASE-SR4 QSFP+ Transceiver, and HP 805755-B21 40GBASE-SR4 QSFP+ transceiver, all those QSFP+ transceivers offered by Fiberstore are the most cost-effective standards-based transceiver modules and fully compatible with major brands and backed by a lifetime warranty.