2017年6月29日星期四

Fusion Splice vs. Mechanical Splice

Fusion Splice vs. Mechanical Splice

There are four basic steps involved in fusion splice and mechanical splice. For both the two methods, the first two steps are nearly the same, and there’s a little difference for the last two steps.
 
Steps for Fusion Splice
ST-70R Ribbon Fiber Fusion Splicer
Step 1: Fiber preparation. Fibers are prepared by stripping away all the protective coatings, such as cladding, jacket and sheath. Once only bare glass remains, the fibers are carefully cleaned--and here, cleanliness is next to godliness.
 
Step 2: Cleaving. Cleaving isnt cutting. As the word implies, it’s scoring the fiber using a cleaver and pulling or flexing it until it breaks. The cleaved end must be mirror-smooth and perpendicular to the fiber axis to obtain a proper splice.
 
 
 
Step 3: Fusing the fibers. Fusion, in turn, consists of two steps: aligning and heating. Alignment can be fixed or three-dimensional, manual or automatic, and is normally accomplished with the aid of a viewer that magnifies or enhances the images of the fiber ends, so that they can be properly positioned. Common magnifying devices are video cameras, viewing scopes and optical power meters. Aligning the fibers means perfectly matching up their two ends, so that light can pass from one fiber to the other with a minimum of loss, reflection or distortion. Once the fibers are aligned, they are fused or burned together by generating a high-voltage electric arc that melts the fiber tips, which are then pushed or fed together.
 
 
 
Step 4: Protecting the fiber. Protecting the fiber from bending and tensile forces will ensure the splice not break during normal handling. A typical fusion splice has a tensile strength between 0.5 and 1.5 lbs and will not break during normal handling but it still requires protection from excessive bending and pulling forces. Using heat shrink tubing, silicone gel and/or mechanical crimp protectors will keep the splice protected from outside elements and breakage.
 
 
 
Steps for Mechanical Splice
 
As previously mentioned, the differences between the two lie in the last two steps. Thus, the step 3 and step 4 for mechanical splices are described below.
 
Step 1 and 2: see the process for fusion splice.
 
Step 3: Mechanically join the fibers. There is no heat used in this method. Simply position the fiber ends together inside the mechanical splice unit. The index matching gel inside the mechanical splice apparatus will help couple the light from one fiber end to the other. Older apparatus will have an epoxy rather than the index matching gel holding the cores together.
 
Step 4: Protect the fiber. The completed mechanical splice provides its own protection for the splice.
 
Fusion Splice vs. Mechanical Splice: Which to Choose?
 
The typical reason for choosing one method over the other lies on the cost and performance.
 
Cost
 
Fusion splice typically has a higher initial investment due to the investment required to add a fusion splicing machine to your toolkit, but it offers a lower variable cost per fusion splice: $0.50 to $1.50 per splice.
 
Mechanical splice doesn’t require a large upfront investment in tools, but it has a higher variable cost at $10 to $30 per splice. The more splicing you do, the less cost-efficient mechanical splice will be due to its high variable cost per termination.
 
Performance
 
With mechanical splice, the typical insertion loss (IL) is higher—between 0.2 dB and 0.75 dB. This is because the two fibers are simply aligned and not physically joined. (Insertion loss is the loss of signal power resulting from the insertion of a splice in optical fiber.)
 
Fusion splice offers lower insertion loss and better performance, because fusion splice provides a continuous connection between two fibers. The typical loss in fusion splice is < 0.1 dB, providing better protection against cable failure and weak signals.
 
Conclusion
 
Overall, the advantages of fusion splice are primarily lower loss and better reflectance performance. It is in these areas that it surpasses mechanical splice. Many telecommunications and CATV companies invest in fusion splice for their long haul single-mode networks, but will still use mechanical splice for shorter, local cable runs. Since analog video signals require minimal reflection for optimal performance, fusion splice is preferred for this application as well. The LAN industry has the choice of either method, as signal loss and reflection are minor concerns for most LAN applications.

Fiber Optic Tester - Optical Power Meter

Fiber Optic Tester - Optical Power Meter

In fiber optic network, whether installing new cable, or troubleshooting existing cable, cable testing always plays an important role in the process. Optical power meter which is widely used for power measurement and loss testing is well known to us. Today, we are going to talk about this familiar and essential fiber optic tester - optical power meter.
 
As its name suggests, optical power meter is a meter which is used for testing optical power. So, what is optical power? And how to measure power by using optical power meter?
ST-3213 PON Optical Power Meter
Optical Power
 
In simple terms, optical power is the brightness or “intensity” of light. In optical networking, optical power is measured in “dBm” which refers to a decibel relative to 1 milliwatt (mW) of power. Thus a source with a power level of 0 dBm has a power of 1 mW. Likewise, 3 dBm is 2 mW and -3 dBm is 0.5 mW, etc. And one more thing should be known is that 0 mW is negative infinity dBm.
 
 
Measuring power at the transmitter or receiver requires only an optical power meter, an adapter for the fiber optic connector on the cables used, and the ability to turn on the network electronics.
 
The optical power meter must be set to the proper range (usually dBm, but sometimes mW) and the proper wavelength when measuring power. When all are ready, attach the optical power meter to the cable at the receiver to measure receiver power, or to a short test cable that is attached to the system source to measure transmitter power. Mark the value, and compare it to the specified power for the system and make sure it is in the acceptable range for the system.
Handheld Tribrer Brand Optical Power Meter BOU350C
In addition to measuring optical power, optical power meter can be used to test optical lost by using together with light source. What is optical loss and how does the optical power meter achieve loss testing?
 
Optical Loss
 
When light travels through fiber, some energy is lost, e.g., absorbed by the glass particles and converted to heat; or scattered by microscopic imperfections in the fiber. We call this loss of intensity “attenuation”. Attenuation is measured in dB loss per length of cable. dB is a ratio of two powers. Even the best connectors and splices aren’t perfect. Thus, every time we connect two fibers together, we get loss. We called this loss as insertion loss which is the attenuation caused by the insertion of the device such as a splice or connection point to a cable. Actual loss depends on your fiber connector and mating conditions. Additionally, insertion loss is also used to describe loss from Mux since it is the “penalty you pay just for inserting the fiber”.
 
Using Optical Power Meter and Light Source for Loss Testing
 
Loss of a cable is the difference between the power coupled into the cable at the transmitter end and what comes out at the receiver end. But Loss testing requires not only optical power meter, but also a light source. In general, multimode fiber is tested at 850 nm and optionally at 1300 nm with LED sources. Single-mode fiber is tested at 1310 nm and optionally at 1550 nm with laser sources. The measured loss is compared to the loss budget, namely estimated loss calculated for the link. In addition, in order to measure loss, it is necessary to create reproducible test conditions for testing fibers and connectors that simulate actual operating conditions. This simulation is created by choosing an appropriate source and mating a launch reference cable with a calibrated launch power that becomes the “0 dB” loss reference to the source.
 
There are two methods used to measure loss which are called “single-ended loss” and “double-ended loss”. Single-ended loss works by using only the launch cable while the double-ended loss works using a received cable attached to the meter also. The method “signle-ended loss” is described in FOTP-171. By using this method, you can test the loss of the connector mated to the launch cable and the loss of any fiber, splices or other connectors in the cable you are testing. Thus, it is the best possible method of testing patchcords, since it tests each connector individually. The method “double-ended loss” is specified in OFSTP-14. In this way, you can measure loss of two connectors and the loss of all the cable or cables, including connectors and splices in between. The following picture shows these two methods to us. From left to right: Single-ended loss testing (Patch Cord), Double-ended loss testing (installed cable plants).
 
Optical Power Meter Selection Guide
 
As described above, optical power meter is very useful and necessary for fiber optic testing such as optical power measurement and loss testing. Thus, to select a suitable optical power meter is very important. According to the user’s specific application, several points should be considered when choosing an optical power meter:
 
Choosing optical power meter with the best type of detector and interface 
 
Evaluation of calibration and precision as well as the manufacturing calibration procedures should match your fiber and connector requirement 
 
Make sure that the model of the meter is consistent with your measurement range and the display resolution 
 
Whether have a direct insertion loss (dB) measurement function
 
In addition to optical power meter and light source, other tools such as launch cable, mating adapters, visual fault locator or fiber tracer, cleaning and inspection kits as well as other testers are also required for fiber optic testing. fiber-mart.com offers a comprehensive solution of fiber optic testers and tools which help you achieve a reliable and valuable fiber optic system. Contact us via sales@fiber-mart.com for more information.
 

2017年6月28日星期三

Pluggable Transceivers Used in Data Centers

Today’s data centers are going through unprecedented growth and innovation as emerging optical standards and customers’ demands for higher-level networking services converge. Bandwidth, port density and low-power demands come as the main drivers that populate the deployment of fiber optic networks. And in fiber optic network implementations, pluggable transceivers provide a modular approach to safe-proof network design and become the ideal choice to meet the ever-changing network needs in data centers. This text just mainly introduces pluggable transceivers deployed in data centers.
Arista QSFP-40G-PLR4 Compatible 40GBASE-PLR4 Parallel SMF QSFP+ Transceiver
A Quick Question: What Are Pluggable Transceivers?
Pluggable transceivers are transceivers that can be plugged into routers, switches, transport gear, or pretty much any network device to transmit and receive signals. They are hot swappable while the device is operating, standardized to be interchangeable among vendors, capable of operating over many different physical medium and at different distances. For instance, pluggable transceivers can work through copper, through fiber optic cables available in both single-mode fibers (SMFs) and multi-mode fibers (MMFs), realizing 100m, 300m, 10km, 80km distance reach, etc. In addition, these hot-swappable transceivers are also able to support a wide variety of speeds, like 1Gbit/s, 10Gbit/s, 40Gbit/s, 100Gbit/s, or even higher.
 
Pluggable Transceiver – Standards & Protocols
Just as what has been mentioned above, pluggable transceivers are interchangeable. These interchangeable transceivers allow a single device to operate with a wide selection of protocols and functions. Listed below are commonly-used pluggable transceiver standards and protocols.
 
SFP—The small form-factor pluggable (SFP) supports a wide range of protocols and rates, such as Fast and Gigabit Ethernet (GbE), Fibre Channel (FC), and synchronous optical networking (SONET) for dual and bidirectional transmission. SFP medium are available in SMF, MMF, and copper. For MMF media, there exists 1000BASE-SX port type used in 1GbE applications. Take J4858C for example, this HP 1000BASE-SX SFP can realize a maximum of 550m reach at 1.25 Gbit/s over MMF.
 
 
SFP+—The enhanced small form-factor pluggable (SFP+) is an enhanced version of the SFP, supporting data rates up to 16Gbit/s. It was first published on May 9, 2006, and version 4.1 was published on July 6, 2009, supporting 8Gbit/s FC, 10GbE and Optical Transport Network standard OTU2. SFP+ is a popular industry format supported by many network component vendors.
 
XFP—The XFP (10G SFP) is a standard for transceivers for high-speed computer network and telecommunication links that use optical fiber. Its principal applications include 10GbE, 10Gbit/s FC, SONET at OC-192 rates, synchronous optical networking STM-64, 10 Gbit/s Optical Transport Network (OTN) OTU-2, and parallel optics links.
 
QSFP—The Quad Small Form-factor Pluggable (QSFP) is a also a compact, hot-pluggable transceiver used for data communications applications. QSFP+ transceivers are designed to carry Serial Attached SCSI, 40GbE (100G using QSFP28), QDR (40G) and FDR (56G) Infiniband, and other communications standards. They increase the port-density by 3x-4x compared to SFP+ modules. In 40GbE applications, these QSFP+ transceivers establish 40G links with distances up to 300m over MMF, and 40km over SMF. QSFP can also take copper as its media option when the required distance is short. Like QSFP-4SFP10G-CU5M, this product is the QSFP to 4 10GBASE-CU SFP+ direct attach passive copper cable assembly designed for relatively short reach, that is 5m. The image below just shows what this QSFP-4SFP10G-CU5M product looks like.
 
Delta TSP-10G3A1EER Compatible 10GBASE-SR XFP Transceiver
CFP—The C form-factor pluggable (CFP) is a multi-source agreement (MSA) to produce a common form-factor for the transmission of high-speed digital signals. The c stands for the Latin letter C used to express the number 100 (centum), since the standard was primarily developed for 100 Gigabit Ethernet systems.
 
Conclusion
Pluggable transceivers offer distance extension solutions, allowing flexibility in network reach and easy replacement in the event of component failures. They are the answer to today’s network architecture and performance demands. fiber-mart.com supplies various pluggable transceivers supporting different speeds, like SFP (J4858C), SFP+, XFP, QSFP, CFP, etc. Additionally, their transmission medium available in fiber and copper can also be found in fiber-mart.com. For more information about pluggable transceivers, you can visit fiber-mart.com.
 

Recommendations for High-speed Fiber Optic cable

Recent years, with the developments of 10g transceiver modules, there is a low cost technical solution in the short distance high speed internet connections, it is gigabit high speed cable. These direct attach cables also known as twinax cable, they are different from other common fiber optic cable, whether in the application or their appearances. They increase reliability of short 10 Gigabit network connections. In order to satisfy data meter and high performance computing application needs for a high density cabling interconnect system capable of 10Gb/s per channel transmission rates, (shown as the figure)we can find that they are designed to be fully compatible with optical or electrical connections in the factor of shape and industrial standards, sfp+ dac meet the harshest external operating conditions including temperature, humidity and EMI interference. Here I will introduce several popular SFP cables simply.
10GBASE SFP+ Direct Attach Cable
sfp+ cable
First, passive sfp+ cable, standard?sfp+ copper transceiver module? Assemblies are offered in different wire gauges (AWG) depending on length. fiber-mart.com’s SFP+ direct attach copper cable assemblies are a high speed, cost effective alternative to fiber optics in 10Gb Ethernet, 8Gb Fibre Channel and InfiniBand applications. SFP+ copper cable assemblies enable hardware OEMs and data center operators to achieve high port density and convertibility at a low cost and reduced power requirement. They are used to low power consumption to assist in making the passive copper cable assembly on economic solution for within rack, or rack to rack applications, but as for the type, i summarised three points:
 
Copper typical maximum length recommended at 15 meters
Various cable lengths are available for all types
Latch/tab available “on top” or “bottom” position
Except this, the new 3m active optical cable in fiber-mart.com also widely used, just sfp 10g aoc3m. They are usually for QSFP+ to SFP+ applications compliments, its highlights are that they using industry Using industry leading VCSEL technology, an advanced new light-engine design and bend insensitive multimode fiber, this AOC delivers exceptional cost and performance value for 10 and 40GbE applications at distances of up to 100 meters.
Cisco QSFP-40G-ER4 Compatible 40GBASE-ER4/OTU3 Transceiver
Finally the common sfp+ cable, also the most popular products in our fiber-mart.com, Cisco Compatible SFP+ Twinax Copper Cables, sfp+ direct attached twinax copper?(DAC’s) are programmed specifically to work with Cisco equipment. When these cables are plugged into Cisco equipment they will not trigger the error message that a non-Cisco transceiver has been detected. These cables do not violate Cisco’s warranty. Well, i just think it is quite important for users. So you can buy it safety from fiber-mart.com.
 

2017年6月27日星期二

How to Deploy 10G, 40G, 100G in the Same Network

In 2010, 10G SFP+ became the primary equipment interface in data center applications. However, jump to 2017, as demand for greater bandwidth shows no signs of slowing, 40G and 100G transceiver shipments saw a whopping increase. While shipments of 40G and 100G modules are on the rise, the large majority of data center networks don’t undergo a whole replacement of 10G device with 40G or 100G device. Instead, many typically deploy necessary equipment to achieve the coexistence of 10G, 40G, and 100G in the same network. Read this post, and you will get detailed solution.
10G XENPAK to SFP+ Converter Module
QSFP+ 40G to 10G
In the following scenario, an upgraded 40G switch is networked to existing 10G servers with a 1×24-fiber to 3×8-fiber MTP conversion cable. At the switch, a cassette combines three 40G ports (QSFP 8-fiber) on the 24-fiber trunk. In the server cabinet, each 40G port is segregated into 10G LC connections to support server connectivity.
 
Note: in this architecture, if you have existing 12-fiber MTP trunks, you can use a cassette with two 12-fiber MTP inputs that breakout into 3×8-fiber MTP strands, instead of deploying a new 24-fiber MTP trunk cable. However, if you have to move to denser and more complicated applications, the 24-fiber MTP solution makes for easier migration.
 
CFP2 100G Port (10×10)
Like the previous example, the following figure 2 also shows a similar scenario in existing 10G servers, but it uses 100Gbase-SR10 ports on the switch, which requires a 24-fiber connector to drive the 10×10 transceiver port. Instead of breaking into 8-fiber connections, it uses 24-fiber MTP patch cord from the switch to the patch panel in the top of the rack. A 24-fiber MTP trunk connects the switch and server cabinet. The MTP cassette at the top of the server cabinet converts the 100G port into ten individual 10G port with LC connectors.
 
 
Note: As in the figure 1, in this scenario, if you already have two 12-fiber MTP trunks, you can use 12-fiber MTP adapter panel, then a 2×12-fiber to 1×24-fiber MTP harness cable could be used at the switch to build the same channel.
 
New Installation for 40G/100G Deployment
Figure 3 shows an example of a completely new installation, using 40G/100G right out of the box without any 10G switches in the channel. This method has 40G or 100G port on the core switches, and 40G uplinks at the ToR switches. The patch panels at the top of each rack use MTP bulkhead, with all 8-fiber cords from one QSFP port to the next.
 
40G100G Deployment - 
1/10GBASE SFP+ 1310nm 10km Transceiver
In this architecture, we can either use 24-fiber trunks that break into 40G ports, or create trunks with 8-fiber strands on every leg, with 8 fibers per 40G or 100G port, as shown in the diagram above. However, we have to pay attention that with 8-fiber legs, the density will become a challenge. In addition, 12-fiber MTP trunks are avoided in this scenario, since integrating existing 12-fiber trunks with 8-fiber connectivity on the patch cord creates fibers unused.
 
Deploying 10G, 40G, 100G in the same network can effectively avoid costly upgrades that require ripping out cabling and starting over with a new network architecture. This post have provided three solutions. All the devices in these three scenarios can be purchased in FIBER-MART.COM. If you are interested, kindly visit FIBER-MART.COM.

What Should We Prepare for 40/100G Migration?

As data center of all types continue to grow in terms of traffic and size, 40G and 100G Ethernet technology is no longer a pipe dream—it is well on the way and set to become the new standard for high bandwidth and intelligent architecture. Faced with this upcoming trend in data center, what preparation should we do? Read this post, and you will get some details.
 
LC or MPO Interfaced 40/100G Modules?
Normally, there are two interfaces that 40/100G transceivers use: LC and MPO. LC interfaced modules will be used over single-mode fiber for long distance data transmission, while MPO interfaced modules are commonly deployed with multimode fiber for short distance. However, there are also some transceivers not following this rule. For example, 40GBase-UNIV uses duplex LC connector, but it only supports 150 meters over OM3 or OM4 fiber, and 500 meters over single-mode fiber as we have mentioned in the previous post. Besides, 100GBase-PSM4 is a single-mode module, but it has MPO interface to achieve data transmission. Choosing LC or MPO interfaced 40/100G transceiver totally relies on the transmission distance that your practical application requires.
 
100GBASE-LR4 and OTN Multirate CFP2 1310nm 10km Transceiver for SMF
Keep Budgets Down with Pre-terminated Cabling System
Cost is always the most important factor that every IT managers and ordinary users will concern. Since the technology for 40G and 100G is not as mature as 10G, devices used in these high-speed networks are more expensive, so we should keep our budget down as possible as we can in every aspect in the process of 40/100G migration. Then pre-terminated cabling system is a good choice.
 
Pre-terminated cabling system contains factory manufactured cables and modular components with connectors already attached. It comes in a number of different forms, from connectorized fan-outs and attached or discreet cassette modules to cable bundles utilizing both fiber and copper with protective pulling grips installed over the connectors at one end. With these pre-terminated cabling, the need for labor to make terminations on site will be mitigated. And fewer labor means more savings on the labor bill. As report indicates, using the pre-terminated approach can achieve a saving of 57 percent.
 
Future-Proof Your Network with 24-Fiber Infrastructure
In many 40/100G cases, 12-fiber system is more recommended to use between core switched and the equipment distribution area in the data center, but actually, if you want to future-proof your network, try 24-fiber infrastructure. Why? Let’s have a quick comparison.
 
For typically 40GbE applications, the 4 right and 4 left fibers of a 12 fiber MPO connector are used for transmit and receive while the inner 4 fibers are left unused. For 24-fiber 40GbE application, all fibers are utilized in the MPO plug. 24 fibers, divided by the 8 fibers per circuit that are required, yields 3 full 40GbE connectors. For 100GbE applications, if we choose 12-fiber MPO connector, we need two connector and two MPO trunk cables, the middle 20 fibers are used for transmit and receive 10Gb/s while the 2 fibers on the right are left unused. However, in this case, we just need one MPO 24 connector and one 24f trunk cable. As data centers continue to be crowded with more cabling, with 24-fiber system, about 1-1/2 times more pathway space could be saved.
 
Conclusion
With the rapid increase in bandwidth consumption, the migration from 10GbE to 40/100GbE is inevitable. Proper interfaced transceiver, pre-terminated cabling system and 24-fiber infrastructure are required to build a cost-effective and high density 40/100G data center. If you’re interested in the components that we have mentioned above, kindly visit FIBER-MART.COM.

2017年6月26日星期一

Customized 40G QSFP+ to 8LC Breakout AOC Solutions in FIBER-MART.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.
Customized 40GBASE QSFP+ to 4 SFP+ Breakout Active Optical Cable
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.
 
fiber-mart.com Customized 40G QSFP+ to 8LC Breakout AOC
10M(32.8ft) 40GBASE QSFP+ to LC/SC/ST/FC Connector(8) Breakout Active Optical Cable
Besides, standard 40G QSFP+ to 8LC Breakout AOC in already designed length, fiber-mart.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 fiber-mart.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. fiber-mart.com provide customized length within 100m of choice(40G QSFP + ports consumes less than 1.5W).

Juniper Networks SFP Module EX-SFP-10GE-SR

SFP is with higher data rate and new industrial standards and it is with more compact size compared with the former 10G transceivers X2 and Xenpak, it has greater ability for density installations. With the rapid development of fiber optic technologies, 10G Ethernet products are coming to fit the increasing demand for bandwidth. SFP plus is the 10G fiber optic transceiver used for 10G Ethernet and other high speed transmissions. It is the upgraded version of the former SFP transceivers (MINI GBIC), This post will focus on Juniper Networks SFP module EX-SFP-10GE-SR.
Juniper 1.25Gbps 100GHz DWDM SFP 100km Compatible Transceiver
Overview of Juniper SFP Modules
Juniper SFP transceivers are the most cost-effective standards-based optical modules fully compatible with Juniper Switches & Routers. The Juniper SFP modules are tested in-house prior to shipment to guarantee that they will arrive in perfect physical and working condition before delivered worldwide. Fiberstore provides Juniper compatible SFP transceivers which can be equivalent to EX-SFP-10GE-SR, EX-SFP-10GE-LR, SFPP-10GE-SR, EX-SFP-10GE-ER, etc. The following part will introduce Juniper EX SFP 10GE SR.
 
Juniper EX SFP 10GE SR Brief Information
This Juniper compliant EX-SFP-10GE-SR is a 10GBASE SR SFP 850nm 300m transceiver module. The EX SFP 10GE SR transceiver module combines quality with low cost and gives you an ideal alternative except for the high price transceivers. The EX SFP 10GE SR is 100% compatible with all Juniper series switches and modules which support SFP transceivers. Here is a figure for you.
 
Juniper EX-SFP-10GE-SR
 
This SFP (mini-GBIC) transceiver module is designed for use with Juniper Networks network equipment and is equivalent to Juniper Networks part number EX-SFP-10GE-SR. This transceiver is built to meet or exceed the specifications of the OEM and to comply with Multi-Source Agreement (MSA) standards. This product is 100% functionally tested, and compatibility is guaranteed. The transceiver is hot-swappable input/output device which allows a 10 Gigabit Ethernet port to link with a fiber optic network. OEM specific configuration data is loaded on to the EEPROM of the transceiver at the factory, allowing this transceiver to initialize and perform identically to an OEM transceiver. This transceiver may be mixed and deployed with other OEM or third party transceivers and will deliver seamless network performance. A list of compatible network equipment is available on the Specs tab of this page.
Juniper JX-SFP-1000BASE-T Compatible 1000BASE-T SFP Copper 100m Transceiver
Key Features
 
Operating data rate up to 10.3Gbps
850nm VCSEL Transmitter
TX Power :-6~-1dBm
Receiver Sensitivity:-11.1dBm
Distance up to 300m @50 / 125 um MMF
Single 3.3V Power supply and TTL Logic Interface
Duplex LC Connector Interface, Hot Pluggable
Compliant with MSA SFP+ Specification SFF-8431
Compliant with IEEE 802.3ae 10GBASE-SR/SW
Power Dissipation < 1.0W
Built-in Digital Diagnostic Function
Applications
10GBASE-SW at 9.953Gbps
10GBASE-SR at 10.3125Gbps
Other Optical Link
 
Conclusion
fiber-mart.com have a large quantity in stock transceivers and can ship in the Juniper EX SFP 10GE SR transceivers, you will find the cost effective modules here and you will find our Juniper EX SFP 10GE SR beyond your expectation, All of our module transceivers are tested in house prior to shipping to insure that they will arrive in perfect physical and working condition. Contact us today to save the time and cost by buying from original manufacturer directly. And now fiberstore is making a discount of 30% of the price about Juniper SFP.

2017年6月25日星期日

What is FTTx Network?

Since the customers have demanded for a more intensive bandwidth, the telecommunication carriers must seek to offer a matured network convergence and enable the revolution of consumer media device interaction. Hence, the emergence of FTTx technology is significant for people all over the world. FTTx, also called as fiber to the x, is a collective term for any broadband network architecture using optical fiber to provide all or part of the local loop used for last mile telecommunications. With different network destinations, FTTx can be categorized into several terminologies, such as FTTH, FTTN, FTTC, FTTB, FTTP, etc. The following parts will introduce the above terms at length.
LSZH Selfsupporting Indoor FTTH Fiber Patch Cable
FTTH
FTTx is commonly associated with residential FTTH (fiber to the home) services, and FTTH is certainly one of the fastest growing applications worldwide. In an FTTH deployment, optical cabling terminates at the boundary of the living space so as to reach the individual home and business office where families and officers can both utilize the network in an easier way.
 
FTTN
In a FTTN (fiber to the node) deployment, the optical fiber terminates in a cabinet which may be as much as a few miles from the customer premises. And the final connection from street cabinet to customer premises usually uses copper. FTTN is often an interim step toward full FTTH and is typically used to deliver advanced triple-play telecommunications services.
 
FTTC
In a FTTC (fiber to the curb) deployment, optical cabling usually terminates within 300 yards of the customer premises. Fiber cables are installed or utilized along the roadside from the central office to home or office. Using the FTTC technique, the last connection between the curb and home or office can use the coaxial cable. It replaces the old telephone service and enables the different communication services through a single line.
 
FTTB
In a FTTB (fiber to the building) deployment, optical cabling terminates at the buildings. Unlike FTTH which runs the fiber inside the subscriber’s apartment unit, FTTB only reaches the apartment building’s electrical room. The signal is conveyed to the final distance using any non-optical means, including twisted pair, coaxial cable, wireless, or power line communication. FTTB applies the dedicated access, thus the client can conveniently enjoy the 24-hour high speed Internet by installing a network card on the computer.
 
FTTP
FTTP (fiber to the premise) is a North American term used to include both FTTH and FTTB deployments. Optical fiber is used for an optical distribution network from the central office all the way to the premises occupied by the subscriber. Since the optical fiber cable can provide a higher bandwidth than copper cable over the last kilometer, operators usually use FTTP to provide voice, video and data services.
 
FTTx Network Applications
With its high bandwidth potential, FTTx has been closely coupled with triple play of voice, video and data services. And the world has now evolved beyond triple play to a converged multi-play services environment with a high bandwidth requirement. Applications like IPTV, VOIP, RF video, interactive online gaming, security, Internet web hosting, traditional Internet and even smart grid or smart home are widely used in FTTx network.
 
Conclusion
FTTx technology plays an important part in providing higher bandwidth for global networks. According to different network architectures, FTTx is divided into FTTH, FTTN, FTTC, FTTB, FTTP, etc. FIBER-MART.COM provides FTTx solutions and tutorials for your project, please visit FIBER-MART.COM for more information.

Plastic Optical Fiber – A “Consumer” Optical Fiber

If you are thinking of pre-wiring or rewiring your home network, there are many alternatives to consider. POF (Plastic optical fiber) could be one of your options. It is usually called as “consumer” optic fiber, as it is a low-cost optical fiber alternative with flexibility and ease of end finish.
MPO Trunk Cable 3.0mm LSZH/Riser
 
Plastic optic fiber is a large core step-index fiber with a typical diameter of 1 mm, which typically uses PMMA (acrylic), a general-purpose resin as the core material, and fluorinated polymers for the cladding material. It is a specialty fiber has various advantages and is useful for illumination, sensors and low speed short data links and so on.
 
Plastic optical fiber works in the same manner as glass optical fiber but uses plastic instead of glass. Although POF has a higher attenuation than glass optical fiber, it is acceptable for certain applications. Because it has merits that the glass optical fiber does not have. Unlike glass, plastic optical fiber has a larger core made out of PMMA and larger numerical aperture, which is capable of withstanding tighter bend radius than glass optical fiber. Thus it can be easily be cut and bent to fit in hard-to-reach places. Besides, the cost of plastic optical fiber is much lower.
 
POF has a data transfer speed lower than glass optical fiber, but comparing with the more traditional copper wiring, POF has a much faster transfer speed. Plastic optical fiber also has the merits that copper wiring does not have. They are as following:
 
POF is Complete immunity to electromagnetic interference (EIM).
POF is an electrical insulator, which can be laid down in power ducts.
POF has lower weight than copper wiring.
POF is cheaper than copper wiring
With the growing demand for high-speed communications over private intranets and the internet, varied applications with plastic optical fiber have been developed and commercialized. Plastic optical fibers can be used as light transmission guide in displays or as sensors and telecommunications cables. The uses of POF can be found in but not limited to the following fields: FTTH, automotive, medical, intelligence, lighting, sensor, digital audio and video interfaces.
MTP/MPO Machinery & Testing Equipment
If you are looking for plastic optical fiber for cabling, FIBER-MART.COM will satisfy your needs. It provides both simplex plastic optical fiber and duplex plastic optical fiber. For more information about FIBER-MART.COM’s POF products, you can visit its online store by clicking the following words: plastic optical fiber.

2017年6月23日星期五

Talk About QSFP 40G SR4 to 4 SFP 10G SR Transceiver Module

Talk About QSFP 40G SR4 to 4 SFP 10G SR Transceiver Module

As we know, SFP+ and QSFP+ fiber optic transceiver module and fiber optic cables bring to people a wide variety of high density and low power 40 Gigabit, 10Gigabit, 1 Gigabit, and 100 Megabit Ethernet connectivity options over fiber or copper media.
Arista QSFP-40G-ER4 Compatible 40GBASE-ER4 QSFP+ Transceiver
The example of 40G QSFP transceiver module will bring us to have knowledge of it. In 40G QSFP transceiver module data sheet, we can see that about SFP 40G SR4, cisco thinks, it can be used in a 4 x 10 G mode for interoperability with 10Gbase sr interfaces up to 100m and 150m on OM4 and OM3?cables respectively, in another word, if i connect Nexus 55772UP equipped with “six true QSFP ports” to Nexus 7706 using QSFP 40G SR 4 on the side of 5572UP, and 4 x cisco SFP 10G SR on the side of 7706? Somehow, i think that this is not impossible, but someone thinks that there are fiber optic cables with 40G interface on one side and 4 x 10G SFP (LC connector) on the other side. We can breakout the single 40G port into 4 seperate 10 G ports and use a QSFP to 4 LC breakout cable to link one or more of 10G ports to the 7706.
 
In fact, Cisco 10Gbase SR4 QSFP Module supports link lengths of 100m and 150m, respectively, on laser optimized OM3 and OM4 multimode fibers. It primarily enables high bandwidth 40G optical links over 12 fiber parallel fiber terminated with MPO/MTP multifiber connectors. It can be used in a 4 x 10G mode for interoperability with 10Gbase sr interfaces up yo 100m and 150m for OM4 and OM3 cables, respectively. The worry free 4 x 10G mode operation is enabled by the optimization of the transmit and receive optical characteristic of the Cisco QSFP 40G SR4 to prevent receiver overload or unnecessary triggering of alarm thresholds on the 10Gbase SR receiver, at the same time being fully interoperable with all standard 40Gbase sr4 interfaces. 4 x 10G 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. Cisco QSFP 40G SR4 is optimized to guarantee interoperability with any IEEE 40GBASE SR4 and 10GBASE SR (in 4 X10G modes).
 
The transceiver consists of parallel electric and optical products along with both transmitter and receiver functions as a single module. It is designed to be compliant to IEEE 802.3-2012 for 40GBase SR4 over 100 m of OM3 multimode fiber at a rate of 41.25 Gbps. This transceiver module has an option to work with four independent 10GBase-SR, IEEE 802.3 Clause 52 Compatible 10 G transceivers through an MPO-to-LC breakout cable (compliant at 100 m over 50 μm OM3 fiber). The transceiver is also fully compliant with the QSFP+ MSA specification SFF-8436 Shown at the Figure.
 
To support a good increasing range of 10 and 40 Gigabit Ethernet applications, Fiberstore offers many transceiver types, each optimized for a different media and distance reach (LR4, PLRL4, SR4, XSR4,CR4, CR, SRL, SR, LRL, LR, ER, ZR, and DWDM). Additionally, fiber SFP+ ports also support 3 Gigabit Ethernet SFP transceiver types for single mode fiber, multimode fiber, as well as Cat 5 copper cable.