Posted in Fiber Optic Cable

Solutions to Common Issues About Fiber Optic Cable

It is a common sense that the light of optic transmission can travel much longer distances than normal transmission medium. And that is why fiber optic cable is of popularity than copper cable those years. Apart from the higher bandwidth, its very high performance data working and telecommunications has won the good reputation for itself. As it has been used by more and more Ethernet users, some common problems about fibre cable occur. Then how to solve them? This passage would provide a satisfied answer for you.

Fiber Damage

It is reckless to judge whether the fibers within the cable are broken or damaged just by looking at it through the naked eye. In most cases, the fiber damage would not so evident that could be observed by its outer appearance. Under this occasion, a fiber optic tracer can be utilized to trace any faults within the cable. Its operation principle just like a miniature flashlight that uses an LED and can be fitted to the the cable connector for the purpose of checking continuity. If the fibers are all complete and not damaged, you can see the light from the two ends the cable is shone.

Optical fibers


LC, SC, ST, FC, MPO, MTP…are common connectors of optic cords, and it is paramount to fit correct connectors to the fiber cable. Before you use the fibre cable, you should check each of the connectors to see if they well fitted or not. If not, it is necessary for you to rectify it by inserting them properly. If the issue still happens, you can replace the cable by a cable of spring loaded connectors. In that way, the connectors would fit the cable securely and would not slip out.

fiber optical cables

Length Problem

Once the a fiber optic cable has redundant length after it has been used for a connection, there are potential risks with the left cable and it would result in permanent damage to the fibers and components within the cable. The potential risks are bending, twisting or winding around the cable itself. Almost every store provides different cable length for meeting the requirement of various length demand, especially the online store, they still offer the service of customizing, and you can get the exact cable length according to your actual demand. Before you look through the online cable store, it is essential for you to get your optimal needing length by using a measuring tape. You can position all the equipment that you intend to connect with the cable, and then measure the distance of them and get the approximate length.


Stretching Problem

If an optical fiber cable being stretched over a range itself, and then the fiber and other components within the cable would be damaged. You can move the cables closer or buy an additional cable with proper length. There is another case would cause stretching. Sometimes, it just occurs when you pulling at the jacket of the cable. You should use the grips at the connectors designed to be used to fit and remove them.

External Damage

It is quite necessary to have a thorough visual inspection of the optical fiber cable from time to time. Because any defects would affect the ability of the cable to work properly and even bring unimaginably consequences. During the inspection, if you find any prominent defect occurs, such as splits or scratches, and then please replace the cable.


It seems that it is an irresistible trend to use optical fiber cables now and future. According to this article, we are cleared that some basic solutions for the some common issues about fibre cables. If you need some, you can take FS a try, we provide large and in-stock fiber optical cables in a full range. Besides, we offer customizing service to meet your satisfaction. If you are interested, please visit

Posted in Modules

Choosing the Right Cisco Compatible SFP Transceivers for Your Network

Choosing a right compatible optical transceiver just like choosing a specific wand by a wizard in Harry Potter—the consequences of using the wrong one can result in some serious irreparable loss. Thus, it is paramount to choose a right compatible optical transceiver for your network switch. Selecting the right optical module can save you more time and money to plan out your network’s future. This article would provide a solution about how to choose the right Cisco compatible SFP transceivers for your network.

About Cisco Compatible SFP Transceivers

A complete network system includes many components, such as servers, racks, cabinets, etc, the small form-factor pluggable (SFP) optical transceiver is indispensable in the whole network setup. SFP transceivers are hot-swappable and have the capability to allow design modification until the final stages of manufacturing. This makes it easier to accommodate different connector interfaces. SFP transceivers also have a higher optical reliability and will permit higher soldering temperatures. They are recommended by fiber optic component providers to ensure proper data transmission.


As a worldwide leader in IT and networking, the Cisco SFP optical transceivers are really costly, which brought much trouble when you budget your money on network deployment. Fortunately, there is an alternative: Cisco compatible SFPs. The Cisco compatible SFP transceivers can be used in campuses, data centers and metropolitan area access networks for Gigabit Ethernet and Fiber Channels as it is a commendable and cost-effective option.

Two Major Things to Consider When Looking at Cisco Compatible SFPs:

Before you start searching for a Cisco compatible SFPs, you should ask yourself, “What type of SFP transceivers do I need?” In this occasion, you should take your existing network equipment into consideration, the crucial thing is that the parameters of your switch port, which refers to number, type, density and etc. If you intend to improve and upgrade your network efficiency but have no idea about the detailed approach, you can ask advice from a trusted networking vendor.


Although the form factor isn’t that large, the role it plays cannot be ignored—SFPs are the workhorses of a network system, and you can find one for every job. Because they provide a wide range of inputs beyond those provided by a switch on its own. The main advantage of a Cisco compatible SFP lies in its scalability, which reduce needless bother for a full-on upgrading of your network switch. In this way, a lot of money can be saved for your network deployment.

—A trusted vendor

Over the years, the third-party vendors of optics just emerge as the pouring water. A trusted and reliable vendor seems hard to find facing so many optic’ vendors on the market. So how do you find a trusted vendor?


First off, you want to ensure that any Cisco compatible SFPs you purchase will actually be compatible and are made with quality raw materials. Secondly, you need to investigate the most optimal third-party vendor for yourself. The approaches vary: you can submit your question to several professional forums about networking, such as Cisco support community, SNB forums, network engineering stack exchange…You could receive professional replies and solutions from there. After that, you need to compare price of the several third-party vendors with a purpose to select a most appropriate one for yourself. Last but not least, when you make up your mind the final optics vendor to go, the final factor you should consider is product warranty. A good vendor is willing to provide you with a guaranteed long-term warranty. Bad quality products typically have short-term warranties because a vendor knows they won’t last as long.

FS.COM’s Compatible Cisco SFPs

According the last paragraph, we clearly know the importance of selecting a reputable third-party vendors. It is true that there is a certain amount of such vendors on the market, but it is not so easy to find products from such an optics’ vendor with much preference in terms of cost. FS.COM (Fiberstore) is a leading manufacturer and supplier of fiber optic subsystems, components and solutions. All of our optical transceivers are tested and 100% compatible to switches of many major brands, like Cisco, Juniper, Brocade, Arista, etc. You can rest assured to buy our products. If you are interested in any of our products, please feel free to contact us.

Posted in Modules, MTP/MPO cable

Cable Specifications&Deployment for QSFP28 Transceivers

100G QSFP28 transceivers have currently been highly favored by Ethernet users and been widely applied to the data centers. The QSFP28 transceivers that are supported on Ethernet network devices use fiber optic cables and connectors. The type of connector and the type of fiber depend on the transceiver type. To make sure right connectivity, it is of necessity to know the appropriate patch cable and connectors for QSFP28 transceivers. This article would introduce the cable and connector specifications and deployment as well as some precautions for QSFP28 transceivers.

100G Switch

Cable Specifications for 100G QSFP28 Transceivers

12-Ribbon patch cable with MPO connectors and LC duplex patch cable are two common fiber optic patch cables connected with 100G QSFP28 transceivers to achieve 100G Ethernet network connectivity. A 12-fiber ribbon cable can be used in outside plant applications or inside buildings when covered with flame-retardant outer jackets. LC duplex patch cable uses for specific 100G transceivers, such as 100GBASE LR4, 100GBASE CWDM4 and etc. The 100GBASE SR4 transceiver supports maximum data links up to 100 m through MTP-12 patch cables. By using LC duplex patch cable, the transmission distance of 100GBASE-LR4 can arrive 10 km.

Deployment for 100G QSFP28 Transceivers

You can use 12-Ribbon Patch cable with MPO connectors to connect two transceivers of the same type—for example, 100GBASE-SR4-to-100GBASE-SR4 or 100GBASE-PSM4-to-100GBASE-PSM4. That is to say, you can choose a MTP trunk cable together with the 100GBASE-SR4 QSFP28 module for direct 100G connection. The following picture shows two 100GBASE-SR4 QSFP+ transceivers connected by a multimode 12-fiber MTP trunk cable.

100G Dirct Connection(1)

As we mentioned above, you can also use SMF patch cables with LC duplex connectors to connect two supported transceivers of the same type—for example, 40GBASE-LR4-to-40GBASE-LR4 or 100GBASE-LR4-to-100GBASE-LR4. The SMF patch cable is one fiber pair with two LC duplex connectors at opposite ends. You can simply plug the LC duplex connectors into the corresponding duplex ports of 100GBASE-LR4, 100GBASE-CWDM4 and etc. 100G direct connection is just achieved by LC duplex patch cable connected with two same 100GBASE-LR4 transceivers, presented in the below figure.

100G Direct Connection(2)

Notes And Cautions:

1.Ensure that you order cables with correct polarity. The multifiber push-on (MPO) connectors on the 12-ribbon cables must be key-up (sometimes referred to as latch up, Type B, or Method B). If you are using patch panels between two QSFP28 transceivers, ensure that the proper polarity is maintained through the cable plant.

Cautions and Warnings

2. Ensure that the fiber end in the connector is finished correctly. Physical contact (PC) refers to fiber that has been polished flat. Angled physical contact (APC) refers to fiber that has been polished at an angle.

3. Caution: Use only a properly constructed, shield cable to ensure correct connectivity.


100G QSFP28 modules is an inevitable choice for Ethernet connectivity with a purpose to suit the future Ethernet network upgrading and higher bandwidth. 12-fiber MTP patch cable and LC duplex patch cable are used for connecting different 100G transceivers with different ports respectively. Moreover, there are something you need to keep in mind in case of causing unnecessary losses and incidents. If you intend to upgrade your network to 100G network, you can take FS.COM for a try. Here, we provide the above optical transceivers and fiber optic patch cables with high quality but low costs. If you need any of our products, please feel free to contact us.

Posted in MTP/MPO adapter, MTP/MPO cable, MTP/MPO cassette, MTP/MPO connector

All Things You Want Know About MTP/MPO Components

40G/100G transmission has been much in the prevalence today in large data centers, cloud computing and etc.The traditional patch cord with LC, SC, ST, FC connector could not satisfy the huge capacity and high speed of 40/100G transmission. MTP/MPO connectors is specially made for long-haul transmission, like data travels along a one way road, which plays a vital part in data transferring. In addition to MTP/MPO connector, MTP/MPO cable, MTP/MPO cassette, MTP/MPO adapter and cleaner are common MTP/MPO components. This article aims at briefly introducing the above MTP/MPO components.

MTP/MPO Connector

MTP/MPO connector engineered for better mechanical and optical performance. Generally, MTP/MPO connector can be divided as 8-fiber, 12-fiber, 24-fiber,48-fiber…The maximum inner fiber can be 144-fiber. The MTP/MPO connector can be divided as male or female connector. The male connector is one with pin while the female connector without pins. They are set for meeting different equipment requirements.


It is known to all that each fiber must have a transmitter at one end, and a receiver at the other. Methods A, B & C are provided for configuring systems to ensure that proper connections are made. Each of these methods handle the transition from a transmit position to a receiver position in a slightly different manner, and each employs a backbone cable that is constructed in a specific manner. From the TX to RX, the correct matching can be called polarity, which is a good choice for 40G & 100G Ethernet implementation.

Each MTP/MPO connector has a key on one side of the connector body. When the key sits on top, this is referred to as the key up position. When the key sits on bottom, we call this as key down position.

MTP/MPO cable

MTP/MPO cable is of popularity in recent years, which is a kind of fiber optic cable that ended of MTP/MPO connectors. Generally, MTP/MPO cable can be divided as MTP trunk cable and MTP breakout/fanout/harness cable. MTP trunk cable is cable pre-terminated with MTP/MPO connectors. The two connectors at each end must be same. In addition to that, the two ends of MTP trunk cable can more than one connector. But the connector amounts must be same of the two ends. Different from MTP trunk cable, MTP breakout cable has different two ends, it has only one connector at one end as well as four or eight connectors at the other end. And the breakout cables have been used most commonly for 40G Ethernet connectivity, especially for 40G to 10G migration.


In addition to the above classification methods, it can be further divided according to the following classification approaches. On the basis of different transmission speed, it can be divided as 10G, 40G and 100G MTP/MPO cable. Single-mode and multimode MTP/MPO fiber optic cable are one of the classification type as well. As we mentioned above, there are three kinds of polarity or methods, Polarity A, B & C. Last but not least, the fiber accounts are also vital to MTP/MPO cable. Above all, different type has different fiber account, polarity and usage. In a conclusion, one certain MTO/MPO cable can be described as 3m (10ft) MTP female to 4 LC UPC duplex 8 fibers OM4 50/125μm Multimode harness cable, polarity B…

MTP/MPO adapter and cleaner

MTP/MPO adapter is a device for connecting two patch cords, just shown as below figure. The adapters are set for matching two MTO/MPO patch cables. To ensure the reliable and efficient performance of the MTP/MPO cables, it is critical to clean the MTP/MPO connectors before mating to other equipment as contaminated connectors would lead to degraded performance and costly but preventable failures. One-click cleaner and cassette cleaner are two ways to clean MTP/MPO connectors. One-click cleaner can clean both exposed jumper ends and connectors in adapters with one-push action. A cassette cleaner contains a refillable lint free reel of cloth that is moved after each cleaning, always presenting a clean surface.


MTP/MPO cassette

Large data centers are industrial scale operations using as much electricity as a small town. MTP/MPO cassette is one of the important part in the cabling system, it including MTP/MPO adapter, Duplex LC adapter, MPO-LC patch cable. Most commonly, there are 8-fiber, 12-fiber and 24-fiber MTP/MPO cassette. Generally, the front end of a cassette is duplex LC adapter and the MTP patch cable is within the cassette. The MTP/MPO cassette functions as connection between switch and LC patch cord. The complete description is just like, 12-Fiber MTP/MPO (female) to LC Duplex Single-mode Cassette, 12-Fiber MTP/MPO (Female) to LC Duplex Multimode OM1 Cassette and etc.



FS offers a wide range of MTP/MPO components with high quality but low price. Different sizes, fiber account, modes of all MTP/MPO components are available. Customization on MTP/MPO patch cable are also available. FS is dedicated to providing best networking gears for our customers and we have cumulated years of experience and expertise. Our products have been deployed in data center and cloud computing applications all over the world. If you need any of our products, please feel free to contact us.

Posted in Modules, Switch

AgilePorts—An Unique Design for Connection on Arista 7150S-64 Switch

In order to meet the requirements of demanding environments such as ultra low latency financial ECNs, HPC clusters and cloud data centers, Arista launched a series of switch—Asita 7150S, including 7150S-24, 7510S-52 and 7510S-64. The Arista 7150S series represents the industry’s leading ultra low latency 1RU 1/10/40GbE layer 2/3/4 wire speed switch family. As one member of the Arista 7150S family, Arista 7150S-64 switch has both SFP+ and QSFP+ ports while the another two haven’t QSFP+ ports. This article would provide the basic information about Arista 7150S-64 switch and its network migration with Agile ports.

An overview on AgilePorts

The most distinctive feature of Arista 7150S switch is the design of AgilePorts on the switch which enables flexible deployment. AgilePorts deliver complete flexibility in connectivity—each SFP+ interface is capable of supporting 100M-10G over a variety of media, including DWDM with distances up to 80 km. The AgilePorts feature also enables groups of adjacent SFP+ ports to be configured for 40Gb operation using 10G transceivers and cables providing maximum port flexibility and a seamless migration from 10Gb to 40Gb.

Information About Arista 7150S-64

The Arista 7150S-64 has 48 SFP+ and 4 QSFP+ ports, you can see the detailed information in the below table. Different from the other two 7150S switches, 7150S-64 has the largest number port and it is the only one has QSFP+ ports. The SFP+ ports can support 1G and 10G operation and also 100Mb support with 100/1000-TX transceivers. On this 7150S-64 switch with QSFP+ ports, you can split the 40G interfaces into 4×10G. The 7150S-64 switch can provide 16×40G interfaces including 4 QSFP+ ports and 12×40G ports (48 SFP+ ports grouped into 12×40G) (see figure1).

Arista 7150S-64 Switch
Description 7150 Switch 48-Port SFP+ 4 QSFP+
Total Ports 64
SFP+ Ports 48
L2/3 Throughput 1.28 Tbps
L2/3 PPS 960 Mpps
Latency 380ns
Typical Power Draw 224 W

Table1: Information about Arista 7150S-64 Switch

7150s-64 switch

Figure1: Rear view on Arista 7150S-64 Switch

Compatible Optical Modules for Arista 7150S-64 Switch

There are many compatible 10GbE SFP+ transceivers for 7150S-64, such as 10GBASE-SR, 10GBASE-LRL, 10GBASE-CR, and so on. You can just plug these SFP+ transceivers into the SFP+ port on the switch. For the QSFP+ ports, there is a wide range of choices as well, including 40GBASE-CR4, 40GBASE-SR4, 40G-PLRL4, 40GBASE-LR4 and etc. The distances can be supported from 100 m over OM3 to 10 km over single-mode fiber on the 7150S-64 switch.

Two Different Connection Solutions

We would mainly compare the common practice of connection with connection with AgilePorts to highlight the key distinction of connection with AgilePorts.

General Connection From 10G to 40G Network

For any network migration, optical transceivers play an essential role. So does the 10G to 40G network migration—you must take 40G QSFP+ transceiver into consideration. If you use the general switches to migrate 10G to 40G network, you can take the following connection solution as a reference. Just as we see in the below picture, an MPO/MTP LGX cassette connects four 10G SFP+ links. And then a Type-B female MPO/MTP trunk cable is used to connect the cassette and 40G QSFP+ Transceiver.


Figure2: 10G to 40G solution (1)

Connection With AgilePorts on Arista 7150S-64

Like we described before, the Arista 7150S switch’s AgilePosts is designed to address device and cabling life cycles, you can upgrade from 10GbE to 40GbE only with just 10G SFP+ transceivers and cables. It provides maximum port flexibility and a seamless migration. Under this situation, 40G QSFP transceiver is unnecessary. 40G connection is achieved by connecting four 10GBASE-SR SFP+ transceivers with LC duplex fiber patch cables. In this way, time and space are saved through this kind of connection.


Figure3: 10G to 40G solution (2)


The Arista 7150S-64 is a 10/40G Ethernet switch, the distinctive design of AgilePorts on the switch plays a prominent role on the network data rate migration from 10G to 40G. If you need 40G optical transceiver for 10G to 40G migration, FS.COM is a good choice. Recently, we have a slump on 40G QSFP SR4 and 100G QSFP28 SR4, buy a 40G QSFP SR4 transceiver only needs $49 at FS.COM. If you choose to use the Arista 7150S-64 with AgilePorts to connect, we also offer large and in-stock Arista compatible 10G SFP+ transceivers. If you need any of our products, please feel free to contact us.


Posted in Modules

How to Install a QSFP28 Transceiver

In recent years, QSFP28 transceivers have been highly favored by many Ethernet users. The modules are hot-swappable input/output (I/O) device that connect the system’s module port electrical circuity with either a copper or a fiber-optic network. Transceiver installation attaches great importance to the whole Ethernet connectivity. This article provides the installation tips of 100 Gigabit QSFP28 optical transceivers.

Information About QSFP28 Transceiver

100 Gigabit (QSFP28) transceiver module is a hot-swappable, parallel fiber-optical module. The interconnect offers four channels of high-speed differential signals with data rates ranging from 25 Gbps up to potentially 40 Gbps, and will meet 100 Gbps Ethernet (4×25 Gbps) and 100 Gbps 4X InfiniBand Enhanced Data Rate (EDR) requirements. These channels can terminate in another 40G QSFP+ transceiver. The QSFP+ transceiver connects the electrical circuity of the system with an optical external network.

The following figure shows the 100G QSFP28 SR4 transceiver. The transceiver is used primarily in short reach applications in switches, routers and data center equipment where it provides higher density than SFP+ modules.


Figure1: 100G QSFP28 SR4 transceiver

Required Tools and Equipment

To install the 100G QSFP28 transceiver, you need the following tools :

    • Wrist strap or other personal grounding device to prevent ESD occurrences.
    • Antistatic mat or Antistatic foam to set the transceiver on.
    • Fiber-optic end-face cleaning tools and inspection equipment.
Installing 100G QSFP28 Transceiver

The QSFP28 transceiver can have either a bail-clasp latch or a pull-tab latch. Installation procedures for both types of latches are provided.

Caution: The QSFP28 transceiver is a static-sensitive device. Always use an ESD wrist strap or similar individual grounding device when handling QSFP28 transceivers or coming into contact with system modules.

Installation Steps:

Step1: Attach an ESD wrist strap to yourself and a properly grounded point on the chassis or the rack.

Step2: Remove the QSFP28 transceiver from its protective packaging.

Step3: Check the label on the QSFP28 transceiver body to verify that you have the correct model for your network.

Step 4: For QSFP28 transceiver, remove the optical bore dust plug and set it aside.

Step 5: For QSFP28 transceiver equipped with a pull-tab, hold the transceiver so that the identifier label is on the top.

Step 6: For QSFP28 transceiver equipped with a bail-clasp latch, keep the bail-clasp aligned in a vertical position.

Step 7: Align the QSFP28 transceiver in front of the transceiver’s socket opening and carefully slide the QSFP28 transceiver into the socket until the transceiver makes contact with the socket electrical connector (see the figure below).

Installing QSFP28 Transceiver Module

Figure2: Installing QSFP28 Transceiver Module (Optical Transceiver Equipped with a Bail-Clasp Latch Shown)

Step8: Press firmly on the front of the QSFP28 transceiver with your thumb to fully seat the transceiver in the module’s transceiver socket (see the below figure).

Caution: If the latch is not fully engaged, you might accidentally disconnect the QSFP28 transceiver.

Seating the 100G QSFP28 transceiver module

Figure3: Seating the 100G QSFP28 transceiver module (Optical Transceiver Equipped with a Bail-Clasp Latch Shown)

Step9: For optical QSFP28 transceiver, reinstall the dust plug into the QSFP28 transceivers optical bore until you are ready to attach the network interface cable. Do not remove the dust plug until you are ready to attach the network interface cable.


Through this passage, we are clear the basic installation procedures of 100G QSFP28 transceivers and please keep the cautions and tips in mind in case of accident. If you need any of 100G QSFP28 transceiver, FS.COM is a good choice. Here, we provide large and in-stock 100G QSFP28 transceivers with low cost but high quality. Besides, our products can be shipped free right now to USA, Canada and Mexico. If you are interested with our products, please feel free to contact us.

Posted in DAC/AOC cable, Modules, Switch

How to Connect Optics for Arista 7250QX-64 Switch

In the previous post “Compatible Optics for Arista 7250QX-64“, we are clear that the features and compatible direct attach cables and optical modules of the Arista 7250QX-64 switch. But how to make the right connection? Is there anything to notice before and in the process of installation? This article would provide a satisfying solution for you.

Connecting a QSFP+ DAC Cable to Arista 7250QX-64

The proper connectivity procedures and some installation notes are very essential for connection between DAC cable and the switch. The detailed information are just below.

The connectivity steps:

1. If the QSFP+ DAC cable connector is covered with a rubber safety cap, remove the cap. Save the cap.

2. Check the port on the switch and make sure the right connectivity. If you choose 40G QSFP+ to QSFP+ DAC cable for connectivity, please make sure that is a 40G port.

3. Insert the cable connector into the switch port.

DAC cable to switch-connection

Figure1: Connecting a DAC cable to a switch

4. Secure the cables so that they do not support their own weight. Place excess cable out of the way in a neatly coiled loop. Placing fasteners on a loop helps cables maintain their shape.

Warnings and Cautions

1. Before you begin connecting the QSFP+ DAC cables to the switch, ensure that you have taken the necessary precautions for safe handling of lasers.

2. Do not bend the QSFP+ DAC cables beyond their minimum bend radius. An arc smaller than a few inches in diameter can damage the cables and cause problems that are difficult to diagnose.

3. Do not let the DAC cables hang free from the connector.

4. Do not allow fastened loops of cables to dangle, which stress the cables at the fastening point.

Installing a QSFP+ transceiver in Arista 7250QX-64

There are many QSFP+ transceiver types supporting Arista 7250QX-64, including QSFP-40G-SR4, QSFP-40G-XSR4, QSFP-40G-PLRL4, QSFP-40G-LRL4, QSFP-40G-PLR4, QSFP-40G-LR4, and QSFP-40G-ER4. Before you begin installing one QSFP+ transceiver in an Arista 7250QX-64 switch, ensure that you have a rubber safety cap available to cover the transceiver. And to prevent electrostatic discharge (ESD) damage to the transceiver, do not touch the connector pins at the ends the transceiver. Figure 2 shows how to install a QSFP+ transceiver.

Optical transceiver-switch connection

Figure 2: installing a QSFP+ transceiver in a switch

Installation steps:

1. Remove the transceiver from its bag.

2. Check to see whether the transceiver is covered with a rubber safety cap. If it is not, cover the transceiver with a rubber safety cap.

Warning: Do not leave a QSFP+ transceiver uncovered except when inserting or removing a cable. The rubber safety cap keeps the port clean and prevents accidental exposure to laser light.

3. If the port in which you want to install the transceiver is covered with a dust cover, remove the dust cover and save it in case you need to cover the port later. If you are hot-swapping a transceiver, wait for at least 10 seconds after removing the transceiver from the port before installing a new transceiver.

4. Using both hands, carefully place the transceiver in the empty port. The connectors must face the switch chassis.

Caution: Before you slide the transceiver into the port, ensure that the transceiver us aligned correctly. Misalignment might cause the pins to bend, making the transceiver unusable.

5. Slide the transceiver in gently until it is fully seated.

6. Remove the rubber safety cap when you are ready to connect the cable to the transceiver.


From the above passage, we may observe that it is not difficult to connect QSFP+ DAC cables or QSFP+ transceiver to the Arista 7250QX-64 switch. Whether you are using DAC cables or QSFP+ transceivers to make connectivity, please remember that do not look directly into a optical transceiver or into the ends of the DAC cables, the laser light may damage your eyes. FS.COM offers large and in-stock Arista 40G QSFP+ DAC cables as well as 40G QSFP+ optical transceivers. If you need any of our products, please feel free to contact us.

Posted in rack

Rack Mount Vs. Wall Mount Rack

As an indispensable IT equipment, network rack or server rack has been playing a significant role in cable management. For efficiently and safely holding all the networking devices, network racks are quite necessary. Without network racks, the cabling would look cluttered and the health of the networking equipment stored inside would be impaired.

Basically, a network rack consists of two or four vertical mounting rails and the supporting framework required to keep the rails in place. The common width of a network rack is 19 inches-most of the racks are made to accommodate any equipment that can fit in to this space. Also the networking equipment have fixed heights that are mentioned in terms of Rack Units—1Rack Unit (RU) = 1.7 inches / 4.4 cm. Generally, there are two types of network racks, rack mount and wall mount rack. What are they? And how to choose? This article would provide a satisfying answer for you.

Rack mount

Rack mount, also called floor standing network racks, which are used to house both network and server equipment. They are primarily used in data centers and other places with a large number of equipment. Their common size are 24U, 30U, 36U, 42U, and 45U. The whole front section generally comes with full length doors with hardened glass/lock. Some might even have rear doors. In addition, the floor standing racks offer specialized channels for electrical cabling, network, etc which ensure neat movement of cables in the rear end, along the height of the racks. These racks can house more equipment and can handle loads of around 450-500 kg. Rack mount can be further divided into another two types: open frame racks and rack enclosures.

Open frame network racks are just shaped as the name implies, they consist of mounting rails without sides or doors, shown as the below figure. They are open racks which have two or four mounting rails (called posts) and 2-post racks generally require less depth but support less weight than 4-post racks. This kind of rack is typically used for applications that do not need the rack to perform airflow control or provide physical security. An open-frame rack provides easy access and offers plenty of open space for cable management, making this solution ideal for network wiring closets and distribution frame applications with high-density cabling.

Open frame racks

Rack enclosures, or rack cabinets, they have removable front and rear doors, removable side panels and four adjustable vertical mounting rails. With locking doors and side panels, enclosed server rack cabinets are ideal for applications requiring physical equipment security at the rack level (as supposed to the room level). Ventilated doors encourage ample airflow from front to back. Enclosure cabinets choose an enclosed server rack for hotter equipment and applications with higher wattages per rack. Server rack cabinets are popular choice for high density data centers and server rooms.

rack encloures

Wall Mount Rack

Wall mount rack is a kind of rack which can be attached to the wall. The biggest advantage is that it can save floor space and fit in areas where other racks cannot. They typically come in open frame or cabinet styles. Wall mounted network racks are useful for housing edge devices in individual departments with fewer networking equipment. Their common sizes: 6U, 9U, 12U and 15U. The front panel generally has a hardened glass door to view they equipment inside clearly and also has a lock to ensure physical security.

Rack Mount VS. Wall Mount
  • Rack form—Rack mount refers to floor standing racks while wall mount rack intends to be attached to the wall. Compared to rack mount, wall mount rack more tends to be space-saving.
  • Size—The common size of rack mount is 24U, 30U, 36U, 42U, and 45U while the wall mount is 6U, 9U, 12U and 15U. Thus, it is clear that the form factor of wall mount is much smaller than the rack mount.
  • Category—Both the rack mount and wall mount have open frames and cabinet styles. You can choose your own style based on your need.

Rack mount and wall mount rack are two different cable managements, and they mainly differ in size and existential space. Wall mount rack focuses on space-saving while floor-standing rack mount prefers to save more IT equipment. You can choose an appropriate server rack according to your requirement. FS.COM provides both the rack mounts and wall mount racks in open frames or cabinet styles with high quality but low cost. In addition to these racks, we also offer large and in-stock compatible optical modules. If you are interested in any of our products, please feel free to contact us.

Posted in DAC/AOC cable, Modules, Switch

Compatible Optics for Arista 7250QX-64

In order to meet the ever-growing need for dense 10 and 40 Gigabit Ethernet switching, Arista launches the 7250X Series switches to support a flexible combination of 10G and 40G in a compact form factor to accommodate both east-west traffic patterns and support the requirement for low latency and power efficiency in dense servers farms. Among the 7250X Series, the Arista 7250QX-64 switch has been highly favored by many Ethernet users due to its low latency, high power efficiency and high performance. The detailed information about the Arista 7250QX-64 switch and its compatible optics will be mainly covered in the following passage.

Features of Arista 7250QX-64

The Arista 7250QX-64 combines low latency, and a shared packet buffer pool of 12MB per group of ports that is allocated dynamically to ports that are congested. With 64 QSFP+ ports the 7250QX-64 is a dense 40GbE or 256 × 10GbE of wire speed performance in a 2RU system. Here are some highlights of this switch:

  • Built-in storage.
  • Resilient control plane.
  • Cloud networking ready.
  • Data center optimized design.

Arista 7250QX-64

The above figure shows Arista 7250QX-64 switch’s 64 QSFP+ ports supporting 64 × 40GbE or 256 × 10GbE.

Compatible Optics for Arista 7250QX-64 at FS.COM

The Arista 7250QX-64 supports a full rang of 10 and 40 Gigabit Ethernet connectivity options. Those 10G/40G ports support installation of SFP+ and QSFP+ modules. FS.COM provides many high-quality compatible 40G QSFP+ DAC cables and 40G QSFP+ modules for Arista 7250QX-64. You can see it clearly in the following tables.

40G QSFP+ Direct Attach Cables

Description of 40G QSFP+ DAC

From the above statement, we are clear that the Arista 7250QX-64 switch has 64 QSFP+ ports, so you can directly connect “transceivers” on the two ends of the DAC cables to the corresponding port on the switch. For transmission distance over short distance, you can choose 40G QSFP+ DAC cables to make network connectivity. By using 40G breakout cable, you can just plug the one end of 40G QSFP+ copper direct attach cable into the 40G QSFP+ ports and plug the other ends of the DAC cable into four 10G SFP+ ports. Besides, you can also connect the two ends of 40G QSFP+ DAC cable with the 40G QSFP+ ports directly to make connectivity on the Arista 7250QX-64 switch. When the transmission distance is longer, 40G QSFP+ AOC cable is a good option to transfer data. Like the 40G QSFP+ DAC cable, you can plug the two ends of 40G QSFP+ AOC cable into the QSFP+ ports on the Arista 7250QX-64 switch. Those 40G QSFP+ DAC and AOC cables are suitable for short distance and ideal for high cost-effective connectivity to your Arista 7250QX-64 switch.

40G QSFP+ Optical Transceivers

As we can see from the above figure, there are many 40G QSFP+ modules available to the Arista 7250QX-64 switch. By using 40GBASE-SR4 QSFP+ transceiver, the maximum distance can be up to 40 km via single-mode fiber on the switch. Through 40GBASE-XSR4 QSFP+ module, link lengths on 7250QX-64 switch can arrive 300 m and 400 m, respectively, on laser-optimized OM3 and OM4 multimode fibers. FS.COM offers the above 40G QSFP+ optical transceivers, which is of compatibility and performance. In addition, all of FS.COM’s optical transceiver are tested for 100% functionality and guaranteed compatible for outstanding network performance.


The Arista 7250QX-64 is designed for high availability, low latency and high power efficiency, which provides a better solution for 10G/40G Ethernet network connectivity. FS.COM offers large and in-stock Arista 40G QSFP+ DAC cables as well as 40G QSFP+ optical transceivers with low cost but high quality. Besides, our products are free shopping right now in USA, Canada and Mexico. If you need any of our products, please feel free to contact us.

Posted in DAC/AOC cable, Switch

Compatible DAC Cables for HPE 7510 Switch

In order to meet the evolving needs of integrated services networks, HPE launches a series of HPE FlexNetwork 7500 switches. They offer 40GbE connectivity and cost effective, wire-speed 10GbE ports to safeguard the throughput and bandwidth needed for mission-critical data and high-speed communications. The HPE FlexNetwork 7500 switches have three specifications: HPE FlexNetwork 7510 Switch, HPE FlexNetwork 7506 Switch and HPE FlexNetwork 7503 Switch. Among them, HPE FlexNetwork 7510 Switch is of popularity and highly favored by many Ethernet users. Today, we would mainly introduce the features of HPE 7510 switch and its compatible DAC cables.

Overview on HPE 7510 Switch

HPE 7510 Switch (JH333A) offers 10GbE and 40GbE connectivity. And it delivers wire-speed Layer 2 and Layer 3 routing services as well. HPE 7510 Switch is a 12-slot horizontal chassis of 16U, with ten I/O module slots support a maximum of 480 Gigabit Ethernet port SFP+ and two port 40GbE QSFP+ main processing units. The I/O module slots support a maximum of 480 Gigabit Ethernet ports or 480 autosensing 10/100/1000 ports or 160 × 1/10GbE ports or 80 × 10GbE posts or 40 × 40GbE ports, or a combination. Among the series of HPE FlexNetwork 7500 switches, JH333A has several distinctive features:

  • It uses an access controls list (ACL) to enforce increased bandwidth for ingress traffic on each port.
  • Industry-standard CLI with a hierarchical structure. Reduces training time and expenses; and increases productivity in multivendor installations.
  • Signature update service. It provides regular updates to the signature database, helping ensure that the latest available signatures are installed.
  • Management interface control. It provides management access through a modern port and terminal interface.

HPE 7510 Switch

This HPE FlexNetwork 7510 Switch supports a maximum of 480 PoE/PoE+ ports, 480 Gigabit Ethernet ports or 480 autosensing 10/100/1000 ports or 480 1/10GbE ports or 480 10GbE ports or 44 40GbE ports or a combination.

Compatible DAC Cables for HEP 7510 Switch

The HEP 7510 switch supports a full rang of 10 and 40 Gigabit Ethernet connectivity options. Those 10G/40G ports support installation of SFP+ and QSFP+ optical modules as well as 10G and 40G direct attach cables for HEP 7510 switch. We would mainly focus on its compatible direct attach cables in the following part.

10G SFP+ Direct Attach Cables

Description of 10G SFP+ DAC Cable

From the last paragraph, we figure out that the HEP 7510 switch has 10G SFP+ ports, so you can directly plug one end of the 10G SFP+ “transceiver” of 10G SFP+ DAC cable into the SFP+ ports on the switch. As we can see from the above table, HEP 7510 switch supports 0.65 m, 1.2 m, 3 m and 5 m long SFP+ passive DAC cables. These cables are hot-removable and hot-insertable: You can remove and replace them without powering off the switch or disrupting switch functions. The cables use high-performance integrated duplex serial data links for bidirectional communication and the maximum data rates can be up to 10Gbps on this HEP 7510 switch connecting with 10 Gigabit Ethernet port. The above HEP SFP+ DAC cables are suitable for in-rack connections between server and HEP 7510 Switch. They are suitable for short distances and ideal for high cost-effective connectivity to your HEP switch.

40G QSFP+ Direct Attach Cables

Description of 40G QSFP+ DAC Cable

The HEP 7510 switch are fixed switch built to provide 10Gbps and 40Gbps server access connectivity. From the above statement, we are clear that the HEP 7510 switch has both 10G SFP+ and 40G QSFP+ ports. Thus, you can connect the end of 40G QSFP+ “transceiver” of 40G QSFP+ DAC cable with the 40G QSFP+ ports directly to make connectivity on the HEP 7510 switch. And also, you can use 40G QSFP+ to 4SFP+ DAC cable to connect—you can just plug the one end of 40G QSFP+ “transceiver” into the 40G QSFP+ ports and plug the other four 10G SFP+ “transceivers” on the other end into the 10G SFP+ ports. The QSFP+ “transceiver” connects directly into the QSFP+ access port on the HEP 7510 Switch with a data rate of 40Gbps while the other end with 4 SFP+ “transceivers” can arrive a data rate of 10Gbps each. The cables use high-performance integrated duplex serial data links for bidirectional communication on four links simultaneously. 40G QSFP+ passive DAC cables are suitable for very short distances and provide a simple and useful way to establish a 40G link between QSFP+ ports switches within racks and acrossadjacent racks.


HPE 7510 (JH333A) switch is a high performance switch, which can be deployed in the enterprise LAN core, aggregation layer, and wiring closet edge. If you are looking for its compatible optical modules and cables, FS.COM is an optimal option as it provides large and in-stock the optical modules and direct attach cables for the HPE 7510 switch with low cost but high quality. Recently, our products are free shipping in USA, Canada and Mexico. If you need any of our products, please feel free to contact us.