Microsoft is delivering a Windows 10 update Christmas present, to gamers and enterprise customers. Only a few months after Microsoft officially launched Windows 10, the company brings an update, which was announced in a Windows Blog post on Thursday.USA TODAY

NEW YORK—Microsoft started rolling out what the company characterizes as the first major update for Windows 10 on Thursday. The free release will mainly be enterprise-focused, bringing management and security tools to the IT professionals in your company.

But consumers are promised some benefits, too. Among other areas, Microsoft says that Windows 10 PCs running the new update will be able to cut boot times by as much as 30%, compared to a computer running Windows 7.

Windows 10 also finally arrives on the Xbox One video game console and soon select Windows Phones as well.

Indeed, under CEO Satya Nadella, Microsoft’s mandate for Windows 10 is built around the notion that Windows 10 apps will work across a whole slew of devices and things: phones, tablets, Internet of Things appliances, holographic experiences that materialize out of thin air — and yes, of course, traditional PCs, too.

The operating system, which formally launched at the end of July, is now actively in use on more than 110 million devices, Microsoft says, 12 million of which are business PCs. And that’s a key area of emphasis with this latest release.

For starters, Microsoft is unveiling Windows Update for Business, which lets IT staffers control when and how updates will be distributed and deployed within their organizations. Microsoft is also opening up a new Windows Store for Business, with companies choosing which apps, public or private, employees will be able to download. Companies can purchase software licenses in bulk at a discount, and manage such licenses through the store.

IT staff will also be able to manage the various privately owned Windows 10 devices that employees choose to bring to the office, reflecting the whole BYOD (Bring Your Own Device) trend.

Security is also getting a lot of attention, with what Microsoft corporate vice president of the Windows and Devices group, Yusuf Mehdi, calls "our strongest bucket.”

Microsoft is also testing other data protection measures with the hopes of keeping corporate and personal data on given devices isolated and contained.

"Every week we see in the news another major data breach – costing organization’s productivity, customer’s trust and driving a real impact to their business,” Microsoft’s executive vice president of the Windows and Devices group Terry Myerson wrote in a company blog announcing the update. "We know these breaches often take 200+ days to detect, and we see the tremendous costs of them. Industry experts predict there will be over two million new malware apps by the end of the year. We designed Windows 10 to protect our customers from these modern threats.”

In his blog post, Myerson thanked Daimler, NESTLE, KPMG, Hendrick Motorsports, Virgin Atlantic, and the PGA Tour, as companies that have collaborated with Microsoft on Windows 10. Microsoft is also receiving support from Box, DocSign, SAP, and Salesforce.

Among the other benefits for consumers is the ability for you to use a pen or stylus to scribble a note to yourself about an event, say, and have Microsoft’s Cortana recognize the phone number or email or street address in that note. Cortana can then send you appropriate reminders to get you to your appointment on time, maybe even by offering the option to book an Uber.

Microsoft says it has improved the speed and security in the Edge Web browser inside Windows 10, with such feature improvements as the ability to hover over a Web tab to get a preview of the underlying page. You’ll also be able to sync favorite sites and reading list items across devices.

And the company has made tweaks to the Mail, Calendar and Photos apps in Windows 10.

As for Xbox, Windows 10 also promises to speed things up and make your most-used content more readily available. But while the user interface on Xbox will also be updated, your actual gaming experience will remain very much the same.

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As the core of optoelectronic device in the WAN, MAN or LAN application, fiber optic transceivers have developed various types along with the increasing in complexity. Take 10G transceiver module as an example, it has experienced developments from XENPAK, X2, XFP and finally realized with SFP+. Many users raised the questions related to the main difference between these optical modules. So, in the following part, we will provide some main tips about the difference among the XENPAK, X2, XEP and SFP +.

The first published XENPAK was by far the largest in physical size, which totally limited its popularity on the market. Many vendors then began to work on alternative standards. Finally in 2003, MSAs published another two 10G transceiver modules called X2 and XFP. X2 and XFP modules have been developed that support all of the high-power, long-distance applications once reserved for the larger XENPAK transceivers. But nowadays, SFP+ has gradually replaced the XFP and becomes the main stream of 10G transceivers markets. Why? The following part will answer you.

Both SFP+ and XFP are 10G transceivers, and can connect with other 10G transceivers. The main reason why SFP+ gain more market share than XFP is that SFP+ is more compact sized than XFP. The smaller SFP+ transfers the modulation functions, serial/deserializer, MAC, clock and data recovery (CDR) and EDC functions from the module to the motherboard on the card. In addition, cost of SFP+ is lower than XFP. Because XFP relies on a high-speed interface (10.3125Gbps), high-priced serializer/deserializer (SERDES) is required inside the switch to support it. They add an unacceptable cost to the base system of XFP. XFP complies with protocol of XFP MSA while SFP+ complies with IEEE802.3, SFF-8431, SFF-8432. SFP+ is the mainstream design currently.

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Transceiver modules can be classified into different categories based on several different criteria. Package, transmission distance, wavelength, work rate, fiber mode, and connector type are all the common characteristics used for defining fiber optic transceivers. The following is a brief introduction to some of the characteristics used in classifying transceiver modules.

Recent telecom systems use wavelength-division multiplexing (WDM), either DWDM (dense WDM) or CWDM (coarse WDM). For the fiber optic transceiver modules, the common wavelength (see in below image) includes 850 nm, 1279 nm, 1310 nm, 1330 nm, 1490 nm, 1510 nm, 1550 nm and 1610 nm. In the CWDM system, the wavelength range is from 1270 nm to 1610 nm, 20nm as a wave band. In the DWDM system, the wavelength range is also from 1270 nm to 1610 nm, but 0.8nm as a wave band.

The half-duplex mode is used with a single transmission line that is used for both reception and transmission. The communication cannot occur simultaneously in the same direction. That’s why it’s called the half-duplex system.

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With the massive applications of bandwidth-related products in telecommunication networks, people may encounter a dilemma of whether to deploy fiber-based or copper-based infrastructure. Limited budget always comes as an essential factor deciding people’s choice, under this circumstance, copper cabling or 1000BASE-T proves to be a nice and cost-saving method. 

1000Base-T is a type of gigabit Ethernet networking technology that uses copper cables as a medium. 1000Base-T uses four pairs of Category 5 unshielded twisted pair cables to achieve gigabit data rates. The standard is designated as IEEE 802.3ab and allows 1 Gbps data transfer for distances of up to 330 feet.

1000BASE-X supports multi-mode and single-mode fiber media and a short-reach, 25-meter copper jumper. As most of the cabling installed inside buildings today is Category 5 copper, the IEEE 802.3 1000BASE-T standard supports Gigabit Ethernet operation over the Category 5 cabling systems installed according to the specifications of ANSI/TIA/EIA-568A (1995). 1000BASE-T, however, works by using all four of the Category 5 pairs to achieve 1000 Mbps operation over the installed Category 5 copper cabling. 1000 Mbps data rates are achieved by sending and receiving a 250 Mbps data stream over each of the four pairs simultaneously.

In contrast, 100BASE-TX uses two pairs: one to transmit and one to receive. Fast Ethernet on Copper (100BASE-TX) achieves 100 Mbps operation by sending encoded symbols across the link at a symbol rate of 125 Mbaud. A 125 Mbaud symbol rate is required because the 100BASE-TX encoding scheme (called 4B/5B coding) has a bandwidth overhead of 20 percent, the difference between 100 Mbps and 125 Mbaud. Although 1000BASE-T uses a different encoding scheme (five level pulse amplitude modulation or PAM-5), because it maintains the 125 Mbaud symbol rate of 100BASE-TX, 1000BASE-T is backwards compatible with 100BASE-FX at the physical layer.

This compatibility feature is significant for network managers and planners because it means that forthcoming generations of 1000BASE-T NICs and switches will support both 100/1000 and 10/100/1000 autonegotiation between Fast Ethernet (100BASE-TX) and Gigabit Ethernet (1000BASE-T). These speed-agile products will enable network managers to deploy 1000BASE-T incrementally into the network.

Fiberstore Compatible 1000BASE-T Transceiver
1000BASE-T is a time-saving and cost-effective solution. Various products have been provided to enhance the 1000BASE-T performances. 

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A transceiver is a combination of a transmitter and a receiver in a single device where they function independently for bidirectional communication. Furthermore, transceiver modules are hot-swappable I/O (input/output) devices which plug into module sockets. The transceiver acts to connect the electrical circuitry of the module with the optical or copper network. There are multiple types of transceivers available on the market, which makes people feel confused about how to choose the right one for their own device. In today’s article, we describe different aspects of transceivers that need to be known before purchasing a transceiver module. I hope it will be a good reference source for the new telecom technicians.

The form-factor specified by MSAs, is needed so that the transceiver can mechanically and electrically fit into a given switch, router etc. Transceiver MSAs define mechanical form factors including electric interface as well as power consumption and cable connector types. There are various MSA types: SFP, SFP+, XFP, CFP, CFP2, CFP4, QSFP and so on.

Always remember to protect the module by inserting clean dust covers into them after the cables are removed because getting dust and any contaminants into the module will greatly affect the normal operation. In addition, please be aware that the regular removal and installation a SFP transceiver can shorten its useful life. For this reason transceivers should not be removed or inserted more often than is required.

Last but not least, transceiver modules are sensitive to static, so always ensure that you use an ESD wrist strap or comparable grounding device during both installation and removal.

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We are quite familiar with difference between single-mode fiber (SMF) and multi-mode fiber (MMF), but we know little about single-mode and multi-mode transceiver. So what are they? And how to choose between them. Actually single-mode and multi-mode fiber are the transport media of a transceiver module. Besides this, here are certain things you need to know before making that decision which can prevent additional costs in the future.

The key differences between single-mode and multi-mode transceiver lie in the following expects—distance and cost, speed, how they work and compatibility issue. The following text will explain them one by one.

The cost difference between single-mode and multi-mode transceiver mainly arises from the cost difference between single-mode fiber and multi-mode fiber. It is known that the optic for single-mode is nearly twice the cost of multi-mode fiber. But the cost of a single-mode transceiver is negligible when installed as part of a project. Therefore, multi-mode transceivers are typically used when the distance involved is not long.

In contrast, multi-mode fiber has a much bigger core and uses a longer wavelength of light, resulting in MMF having higher numerical apertures which means they are better at collecting light than single-mode fibers. In fact, this refers to the optics is cheaper. Due to the modal dispersion in the fiber, multi-mode fiber has higher pulse spreading rates than single mode fiber, limiting multi-mode fiber’s information transmission capacity. Thus multi-mode transceiver can only support shorter distance.Figure 2 shows a compatible CiscoGLC-SX-MMDand a multi-mode patch cable.

We all knew that single-mode fiber and multi-mode fiber are not compatible. The main reason is that they possess distinct wavelength of the laser and core size of the fiber. Take Cisco SFP as an example, there is a type of SFP transceiver module (GLC-LX-SM-RGD) which can support both single-mode and multi-mode fiber. But amode conditioning patch cableis always required when using single-mode transceiver (likeGLC-ZX-SMD) with 62.5-micron MMF, and only at distances that would have worked using multi-mode transceivers. It does not work when we are exceeding the distance specified for multi-mode fiber. The result could be an elevated bit error rate.

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Figuring out X2 transceivers is not as difficult as it seems, but it requires knowing all of the facts first. It is known that X2 transceiver is a hot swappable products designed for 10Gbps fiber optic transceiver applications. But in order to have a better understanding of the X2 transceiver module, some detailed information about X2 transceiver will be provided in this article.

X2 transceiver is a hot pluggable in the Z-direction module that is workable in typical router line card applications, Storage, IP network and LAN and compliant to XENPAK MSA. XENPAK transceiver is a fully integrated 10.3Gbqs optical transceiver module that is made up of 10.3Gbqs optical transmitter and receiver, XAUI interface, Mux and Demux with time and data recovery(CDR).

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When talking about fiber optic transceivers, we may encounter a term — MSA (Multi-Source Agreement). But what is MSA? It seems likes an universal organization that defines all the fiber optic transceivers and many other telecom products. However, this understanding of MSA only stays at the surface. In this passage, a clearer introduction to MSAs and why they are so important to fiber optic transceiver vendors will be presented. Just read the following text and you will gain somethings from it.

MSAs strictly define the operating characteristics of these optical transceivers so that system vendors may implement ports in their devices that allow MSA compliant transceivers produced by name brand, as well as third party vendors, to function properly. That is, transceivers may be purchased from any of the multiple sources in the open market, like Fiberstore. This gives end users more choice when selecting module vendors, which serve to drive down cost through economies of scale.

The most common scheme is to write a unique code into some of the undefined memory in the EEPROM of each fiber optic transceivers. When the transceiver is inserted into the host switch, its EEPROM is read, and, if the code is "incorrect” the module is rejected as "incompatible”. Though the unique code seems like a barrier for the 3rd party transceiver suppliers, many module vendors have determined how to generate and program certain parts with proper codes. Because of this, they are not distinguishable from the brand name parts of the host systems. System vendors will use the tactics to protect consumers from grossly inflated prices. They also introduce standards to support and encourage creation and standards.

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There are two standards for single mode patch cable — OS1 and OS2. The dissimilarity between them is largely a matter of cable construction rather than fiber optic performance. Customers must find their way to see how these cables will improve the functionality of the device. Here is some information related to the differences between the cable construction.

Category OS1 is designed for internal situation where the maximum distance is 2000 meters. This cable type will allow speeds of over one to 10 gigabit Ethernet. However, category OS2 cable is designed for all users where a maximum distance of 5,000 to 10,000 meters, which will also allow a distance of one to 10 gigabit Ethernet. 

OS1 has a greater loss per kilometer than the OS2 outdoor fiber. In general, there is a 1.0 db/km for OS1 compared to 0.4 db/km for outdoor cables. Cables are cheaper with higher loss levels. That’s why many designers prefer OS1 fiber. Slight interoperabilty will be experienced if either the OS1 SM fiber cable or OS2 SM fiber cable is created by splicing or patching. Replacement may be a better option if you decide to incorporate either of these standard fiber optic cable options into your design. 

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Cisco 10GBASE X2 module offers a wide variety of 10 Gigabit Ethernet connectivity options for data center, enterprise wiring closet, and service provider transport applications. Today’s text will be focused on two commonly used Cisco 10GBASE X2 transceivers—Cisco X2-10GB-LR and X2-10GB-LRM.

Cisco X2 transceiver is the most famous X2 transceiver brand in the telecommunication field. Cisco X2 transceiver supports Ethernet, Sonnet/SDH and Fibre Channel applications across all Cisco switching and routing platforms.

Customers may feel confused about Cisco X2-10GB-LR and X2-10GB-LRM since they look like similar except for the extra letter "M”. A brief description of their similarities will be provided in the following table.

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SFP (small form pluggable) transceiver, also called Mini-GBIC by the vendors, is one of the key components required for telecom and data communication applications. There are many companies supplying SFP transceiver like Cisco, Finisar, 3com, HP, NETGEAR, etc. You can find all compatible SFP transceivers in Fiberstore with competitive price and great performance. 1000BASE-LX/LH SFP, one of the commonly used optical transceivers, is now very popular in the optical network system. The following text is going to illustrate something you may feel curious about 1000BASE-LX/LH SFP (GLC-LX-SM-RGD and Finisar FTLF1318P2BTL). From the article, we might have a deeper understanding of using these transceiver modules.

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Cisco’s leading position in data communication is undisputed. Cisco’s products, like switches, routers and Small Form-factor Pluggables(SFP) transceivers occupy most of the market share, of which Cisco SFP transceiver module plays a vital role in it. These small modular optical interface transceivers offer a convenient and cost effective solution for the adoption of Gigabit Ethernet and Fibre Channel in data center, campus, metropolitan area access and ring networks, and storage area networks. Cisco SFP GLC-SX-MM and GLC-SX-MMD are the two common types of Cisco 1000BASE-SX SFPs. Today we are going to talk about the difference between Cisco GLC-SX-MM SFP and GLC-SX-MMD.

First let’s get familiar with GLC-SX-MM. GLC-SX-MM is Cisco 1000BASE-SX SFP transceiver module for multimode fiber. Cisco GLC-SX-MM is the SFP fiber optic transceiver module which operates on the 1000BASE-SX standard. It is the multimode module with a wavelength of 850nm. Cisco 1000BASE-SX SFP transceiver module supports hot-pluggable SFP footprint duplex LC connector Interface. This transceiver is built to comply with Multi-Source Agreement (MSA) standards. GLC-SX-MM supports dual data-rate of 1.25Gbps/1.0625Gbps, which is widely used in fiber channel links, Gigabit Ethernet links, Fast Ethernet links, other optical links. The following picture shows Compatible Cisco GLC-SX-MM SFP.

Besides Cisco GLC-SX-MM, Cisco GLC-SX-MMD is also one of the common types of Cisco’s SFP transceiver modules, which is compatible with the IEEE 802.3z 1000BASE-SX standard. Due to the similar mode, customers are usually getting confused with Cisco SFP GLC-SX-MMD and Cisco SFP GLC-SX-MM when choosing them. So, what’s the difference between them?

As it implies in the word, obviously the letter "D” is the only difference between GLC-SX-MMD and GLC-SX-MM. "D” refers to DOM functionality. DOM stands for Digital Optical Monitoring, which is an widely used standard, intended to give the network administrator the ability to monitor real-time parameters of the SFP, such as optical output power, optical input power, temperature, laser bias current, and transceiver supply voltage.

That means you can configure your device to monitor optical transceivers in the system, either globally or by specified ports. When this feature is enabled, the system will monitor the temperature and signal power levels for the optical transceivers in the specified ports. Console messages and syslog messages are sent when optical operating conditions fall below or rise above the XFP or SFP manufacturer’s recommended thresholds. It is a useful function and now is very popular with users.

It is a great pity that GLC-SX-MM SFP has been no longer for sale since 2013 in Cisco. It is entirely replaced by GLC-SX-MMD. However, many users still choose to use GLC-SX-MM for the consideration of the costs and usage. Cisco GLC-SX-MMD is much more expensive than GLC-SX-MM. They nearly possess the same function in the switch except the additional DOM functionality. 

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With all the innovations being discussed to enhance the intellectual infrastructure, bandwidth, and speed capability, one product is constantly brought up in conversation—fiber optic patch cable. Actually, the use of 50 µm and 62.5 µm multimode patch cable is gaining popularity. Multimode fiber designation OM1, 0M2, 0M3 are determined by he ISO 11801 standard, while OM4 (defined in TIA-492-AAAD) was finalized in August 2009. The following overview identifies some of the key features and benefits of OM1, 0M2, 0M3 and OM4.

Comparison Between OM1, OM2, OM3, OM4

OM1, for fiber with 200/500 MHz·km, has a core size of 62.5µm with an orange jacket which is at the wavelength of 850 nm /1300 nm. It can support 10 Gigabit Ethernet at lengths up 33 meters but is most commonly used for 100 Megabit Ethernet applications.

OM2, for fiber with 500/500 MHz·km OFL bandwidth at 850/1300nm, typically has a core size of 50µm instead of 62.5µm. It commonly comes with an orange jacket and can operate at 850nm/1300nm. It supports 10 Gigabit Ethernet at lengths up to 82 meters but is more commonly used for 1G Ethernet applications.

OM3, for laser-optimized 50um fiber having 2000 MHz·km effective modal bandwidth, is designed for 10 Gb/s transmission. OM3 fiber, optimized for lased based equipment which needs fewer mode of light, is 50µm core diameter with aqua jacket. As a result of this optimization, it is capable of running 10 Gigabit Ethernet at lengths up to 300 meters. OM3 fiber is considered to be the best choice for 10 Gigabit Ethernet unless you need the extra distance provided by OM4.

OM4, for laser-optimized 50um fiber having 4700 MHz·km EMB bandwidth designed for 10 Gb/s, 40Gb/s, and 100 Gb/s transmission. It also has a suggested jacket color of aqua. It is a further improvement to OM3. It uses a 50µm core but it supports 10 Gigabit Ethernet at lengths up 550 meters and supports 100 Gigabit Ethernet at lengths up to 150 meters. OM4 fiber is widely applied in data centers. It provides the most cost effective solutions for data centers by avoiding the higher costs associated with single-mode laser source.

Further more, OM3&OM4 are superior to OM1&OM2. Both OM1 and OM2 work well with LED (light-emitting diodes) based equipment that can send hundreds of modes of light down the cable, while while OM3 and OM4 are optimized for laser (VCSELs) based equipment that uses fewer modes of light. As LED can not turn on and off fast enough to support higher bandwidth application, VCSELs are capable of modulation over 10 Gbit/s and are used in many high speed networks. Thus OM1 and OM2 can only used in 1G which are not suitable for highly speed network today. OM3 and OM4 are used for 10G mostly at present. But they can support 40G and 100G network, which will make them popular in the near future.

Multimode fiber is typically cost effective for inside buildings or corporate campuses. Fiberstore, as a leading fiber optics supplier, offers a large variety of multimode fibers, such as SC to FC multimode OM3 patch lead, FC/UPC to FC/UPC OM1, LC LC 50 125 OM3,etc. There are many types of multimode fiber that you can choose, but the key is determining which of these highly efficient multimode fibers is appropriate for the system installations you are designing or implementing.

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As the increasing requirement of more bandwidth continues to grow, wireless service providers must find cost-effective and efficient methods to meet the bandwidth demand. Traditional transport networks are no longer capable of adequately serving today’s cell sites, newer technologies such as GPON, WDM-PON, and Ethernet over CWDM/DWDM are all suitable to cost-effectively address the growing bandwidth needs of wireless service providers. This passage is aimed to give you a brief introduction to CWDM.

CWDM is short for coarse wavelength division multiplexing, which is fairly generic originally and means a number of different things. In general, these things share the fact that the choice of channel spacings and frequency stability is such that erbium-doped fiber amplifier (EDFA) could not be utilized. One common meaning for CWDM refers to two (or possibly more) signals multiplexed onto a single fiber, where one signal is in the 1550nm band, and the other in the 1310nm band. CWDM is a convenient and cost-effective solution for the adoption of Gigabit Ethernet and Fibre Channel in campus, data-center, and metropolitan area access networks. Next, I will introduce you about some CWDM equipment.

CWDM Transceiver

An interesting and relatively recent development relating CWDM is the creation of GBIC and SFP transceivers utilizing standardized CWDM wavelengths. CWDM transceiver supports FC/APC, FC/UPC, SC/APC, SC/UPC, LC/UPC, LC/APC, etc. GBIC transceiver is larger than an SFP transceiver, the GBIC uses the larger "SC” style of connector while the SFP/SFP+ transceiver uses the smaller "LC” style of optical connector. Many times the optical patch cables will need to have different connector styles at each end, and example is having a SFP (LC connector) installed in a router connected to a SC port on a patch panel. The following picture present you a CWDM Transceiver.

CWDM MUX/DEMUX

Mux is short for multiplexer, yet Demux stands for deultiplexer. CWDM multiplexer is based on CWDM technology. It is a device to allow multiple optical signals at different wavelengths to pass through a single optical fiber strand. CWDM Optical MUX operates in the 1470nm to 1610nm range, which is usually passive device containing a very accurate prism to multiplex eight separate wavelengths of light along a single fiber pair. Passive devices can’t generate or repeat optical signals. The output signal of an optical multiplexer is referred to as a composite signal. At the receiving end, a demultiplexer separates all of the individual wavelengths of the composite signal out to individual fibers. Typically, mux and demux components are contained in a single enclosure. CWDM MUX/DEMUX is shown in the below picture.

1.CWDM MUX/DEMUX Types:

Duplex Bi-Directional CWDM MUX and DEMUXSimplex Bi-Directional CWDM MUX and DEMUXDuplex Directional CWDM MUX onlySimplex Directional CWDM DEMUX only

2.CWDM MUX/DEMUX Packaging:

A. 19'' 1RU Rack chassis or 23'' 1RU Rack chassis
B. LGX modules fit for 1RU Rack chassis or 4RU Rack Chassis
C. Field module type ABS boxD. Empty 1RU, 2RU Rack chassis and 4RU Rach Chassis on option

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100G Ethernet is expected by more and more internet users in order to satisfying their increasing need for higher internet speed and greater bandwidth. Under this circumstance, 100G Ethernet sprang up like the mushrooms in recent years. It is the rising star in the telecommunication industry, so we need to understand 100G Ethernet and its applications in the following content.

100G Ethernet refers to computer networking technologies for transmitting Ethernet frames at rates of 100 gigabits per second (100Gbit/s), respectively. This technology was first defined by the IEEE 802.3ba-2010 standard. It usually needs a variety of devices to build and support the 100G Ethernet. The100G transceiveris one of the essential one, because fiber connectivity is being condensed and simplified with plug-and-play, hot-swap transceiver miniaturization in higher-speed active equipment.

100G transceiver provides customers 100 Gigabit Ethernet connectivity options for data center networking, enterprise core aggregation, and service provider transport applications. 100G transceivers offer significant advantages over existing solutions in terms of reduced power dissipation and increased density with the added benefit of pluggability for reduced first installed cost. CFP is the common type of 100G transceivers

The CFP transceiver is defined as hot-pluggable optical transceiver form factors to enable 40 Gbit/s and 100 Gbit/s applications, which is specified by a multi-source agreement 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). CFP transceiver was designed after SFP transceiver interface, but it supports much larger internet speed — 100G, which is realized by using 10×10Gbit/s in each direction. The 100G optical interconnects typically means 100GBASE-SR10 in 100 meter MMF, 100GBASE-LR10 and 100GBASE-LR4 in 10km SMF reach, and 100GBASE-ER10 and 100GBASE-ER4 in 40km SMF reach respectively.

CFP transceiver is currently defined two next generation 100G form factors — CFP2 and CFP4. Compared to the existing CFP, CFP2 and CFP4 will be respectively double and quadruple front panel port density. A brief introduction will be given to CFP2 and CFP4.

CFP2 optical transceiveris the half size of a CFP, but it enables users to double their front panel density. The typical size of a CFP2 optical transceiver is 41.5mm nominal width with 104 pin electrical connection. And there is no digital signal processor in package, relying on host card. On the other hand, CFP2’s power usage is less than 12w and it supports 10×10G or 4×25G or 8×25G lanes. CFP2 optical transceiver is available in 100GBASE-LR4 CFP2, 100GBASE-CR10 CFP2, 100GBASE-CR4 CFP2, etc. However, CFP4 transceiver is much smaller than CFP2, which provides 56 pin electrical connection. Its power usage is less than 6w and it also supports 10×10G or 4x25G lanes. In all, CFP2 and CFP4, compared with CFP, are not widely popular in the market due to the high cost of development and research.

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Fiber optic patch cable is also called fiber optic jumper or fiber patch cord, which is used to carry information via mode of transmission of light. This fiber optic patch cable is strands of optically pure glass as thin as human hair. The thick layer of protection is used to connect the optical transmitter, receiver, and the terminal box.

When searching for the classifications of fiber optic patch cables,multimode fiber patch cable and single mode fiber patch cable will firstly catch your eyes. Sometimes, people may get confused about how to choose between them. In this passage, I will make the decision easier by comparing the differences between the two, and why you should choose one over the other.

The main difference between multimode and single mode fiber patch cable is the size of core diameter. Multimode fiber patch cable has a much larger core diameter, typically 50-100 micrometers, which is much larger than the wavelength of the light carried in it. Light waves are dispersed into numerous paths, as they travel through the cable’s core typically 850 or 1300nm. Multiple paths of light can cause signal distortion at the receiving end, resulting in an unclear and incomplete data transmission. Due to the influence of dispersion, multimode fiber patch cable’s bandwidth is limited and the transmission distance is short. So multimode fiber patch cable is mostly used for communication over short distances, such as within a building or on a campus.

Yet single mode fiber patch cable has a core diameter between 8 and 10.5 µm and a cladding diameter of 125 µm. Light travels towards the center of the core in a single wavelength that will prevent dispersion. Single mode fiber patch cable gives you a higher transmission rate and up to 50 times more distance than multimode fiber patch cable. Therefore, single mode fiber patch cable is the best choice for transmitting data over long distances. It is usually used for connections over large areas, such as college campuses and cable television networks.

What’s more, multimode fiber patch cable typically uses the cost effective LDE as light sources. It is much cheaper than single mode fiber patch cable. And the jacket color is another characteristics to distinguish multimode fiber patch cable from single mode one. The use of a yellow jacket is for single mode fiber, while orange or aqua is for multimode fiber patch cable.

This passage presents a vivid description of the difference between multimode fiber patch cable and single mode fiber patch cable. To put it simple, transmission distance is always the determining factor when selecting them. For example, if you need to transmit signal in a short distance, multimode fiber patch cable, compared with single mode fiber patch cable, is more suitable and cost effective. But if you need to apply in the longer distance, single mode fiber patch cable is your best choice and it will provide a higher bandwidth to deliver up to twice the throughput.

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SFP ( small form pluggable ) transceiver, also called Mini-GBIC by the vendors, is a compact, hot-pluggable transceiver to transmit electrical signal into an optical signal, which is designed to support SONET, gigabit Ethernet, Fibre Channel, and other communications standards.

SFP transceivers are available with a variety of different transmitter and receiver types, allowing users to select the appropriate transceiver for each link to provide the required optical reach over the available optical fiber type (e.g. multi-mode fiber orsingle-mode fiber). SFP transceivers are also available with a copper cable interface, allowing a host device designed primarily for optical fiber communications to also communicate over unshielded twisted pair networking cable. Today we are going to talk about Cisco 1000BASE-T copper SFP—GLC-T.

1000BASE-T SFP transceiver moduleoperates on the 1000BASE T. It supports 10/100/1000 autonegotiation and Auto MDI/MDIX. 1000BASE T SFP transceiver module uses all four cable pairs for the link and five levels coding scheme. It sends and receives simultaneous transmission on each pair. And 1000BASE-T SFP transceiver can be a maximum length of 100 meters.

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IT elites or practitioners of technology industry may be quite familiar with SFP transceiver. But todaya brand new perspective will be presented to you. It is very worth reading!

SFP transceiver is a compact, hot-pluggable transceiver used for both telecommunication and datacommunications applications, which is not standardized by any official standards, expect multi-sourceagreement. It interfaces a network device, such as swich, router, media converter or similar device, toa fiber optic or copper networking cable.

SFP transceivers have a wide range of varieties that differs in transmission rate (range from 100Mbpsto 4Gbps or more), working distance (From 500m to 100km), wavelength (typically 850nm, 1310nm, 1550nm). SFP transceivers are commonly available in several different product numbers:

SFP-GE-F, SFP-GE-S, SFP-GE-L, SFP-GE-Z, GLC-SX-MM, GLC-LH-SM, GLC-ZX-SM, GLC-T, CWDM-SFP-1470, CWDM-SFP-1490, CWDM-SFP-1510, CWDM-SFP-1530, CWDM-SFP-1550, CWDM-SFP-1570, CWDM-SFP-1590, CWDM-SFP-1610.

GLC-LH-SM SFP is Cisco1000BASE-LX/LH SFP transceivermodule. 1000BASE-LX/LH SFP, compatible withIEEE802.3 standard, is not only made for single-mode fiber or multimode fiber. But this transceiver canbe used for both single-mode and multimode. It can achieve a distance up to 10km over single mode fiberand up to 550 m on any multimode fiber. When used over legacy multimode fiber type, the transmittershould be coupled through a mode conditioning patch cable

GLC-LH-SMcan be used in a variety of Cisco fibre channel switches, servers and other fiber-opticnetwork equipment. Currently GLC-LH-SM transceiver has a number of compatible transceiver that can begeneric version. This will effectively save time and costs.

GLC-LH-SM SFP transceiver from the distributor is a Cisco brand mini-GBIC but can be used to cooperatewith anyone that builds SFP ports such as HP, Finistar, and Juniper among many others. Finding acompliant GLC-LH-SM SFP will save lots of time for IT experts who are now updating network and T3systems.

You may get comfused about how to choose the GLC-LH-SM SFP. In order to solve your problems, I willgive you a hint on selecting an transceiver. First, you should always read the transceiver’s userdocumentation. Then you are supposed to figure out your needs, and then learn to choose the right GLC-LH-SM SFP. For example, a MCP should be used when your network’s installed optical cable is OM1 or OM2rated multimode fiber. In short, the MCP is an optical jumper that transmits fiber from a single modefiber to a multimode fiber.

This post is a reference source for the beginners in this field or those who are lack of knowledge withfiber optic transceiver but have a strong interest in it.

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Fiber patch cable, as one of the most important components of telecommunication, has drawn more and more attention due to the rapid development of telecommunication. Most people were quite familiar with the classification ofsingle-mode fiber patch cableand multimode fiber patch cable. Today, I will present a new type of fiber patch cable to you—armored fiber patch cable.

Definition of Armored Fiber Patch Cable
Armored fiber patch cable is a kind of fiber patch cable, which uses flexible stainless steel tube inside the outer jacket as the armor to protect the fiber glass inside. It remains all the features of standard fiber patch cable, but it is much stronger. And it will not get damaged even if stepped by an adult and they are rodent-resistant.

Structure of Armored Fiber Patch Cable
In the structure of the armored fiber patch cable, the outer sleeve offers protection against rodent, abrasion, twist, etc. It is usually made of plastic such as polyethylene. The next layer between the sleeve and the inner jacket is an armoring materials, such as kevlar, steel, aluminum foil, which is mainly to protect the fiber cable from being stretched during installation. Next the ripcord, ripcords are usually used to splice the cable to connectors or terminators. Then the inner jacket is a flame retardant material to support the inner fiber cable bundle that is made up of strength members, fillers and other structures. The strength members are usually aramid yarn to support the whole fiber cable. This structure is featured by an overall black medium density polyethylene jacket with ripcords.

Types of Armored Fiber Patch Cable
Armored fiber patch cable is usually classified as indoor and outdoor version. Three different kinds of cable armoring are commonly used: double armored, single armored, and non armored. The double armored cables are used at shallow depths near the shore, and the non armored cables are used for most of the ocean floor. The single armored cable is used between these extremes. Usually, the non armored fiber patch cable is cheaper than armored fiber patch cable.
1. Outdoor Armored Fiber Patch Cable
Light armor and heavy armor are the two versions of outdoor armored fiber patch cable. The light armored fiber patch cable, constructed with protective plastic jacket, are crush resistant, bend limiting and water resistant, thus letting these cables suitable for a myriad of applications from interconnects to industrial and semi-harsh environment conditions. While the heavy armored fiber patch cables are usually applied in river bed and the bottom of the sea.
2. Indoor Armored Fiber Patch Cable
Indoor armored fiber patch cable includes simplex armored and duplex armored fiber patch cable. The main difference is that simplex armored fiber optic cable does not contain stainless steel wire woven layer, yet duplex armored fiber patch cable contains stainless steel hose and stainless steel wire woven which are of compressive property, resistance to deflection, rodent resistance, anti-torque.

After going through this passage, you will understand that armored fiber patch cable is the ideal choice for customer who is looking for fiber patch cable with additional durability and protection as well as light weight. 

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Optical communication industry is a rapidly growing field with the growth of the economy and people’s daily life. Fiber optic patch cords can be one of the most typical optical components that witnesses the growth of this industry, which is increasingly becoming popular around the world. But You may get confused about the classifications of fiber optic patch cords, I will help you to have a clear understanding of it.
What Is Fiber Optic Patch Cord?
Fiber optic patch cords are the most commonly used components in fiber optic network, capped at either end with connectors that allow it to be rapidly and conveniently connected to CATV, an optical switch or other telecommunication equipment. Its thick layer of protection is used to connect the optical transmitter, receiver, and the terminal box. Sometimes fiber optic patch cords are also called fiber optic jumpers or fiber patch cords. They are the backbone of the fiber optics industry. These fiber patch cords are strands of optically pure glass as thin as human hair. And these cables carrying information is via mode of transmission of light.
Classification
In general, fiber optic patch cord can be divided by transmission medium (long or short distance), by connector structure and by construction of the connector's inserted core cover.
Transmission Medium
Fiber optic patch cord can be divided to single-mode and multimode patch cord according to different transmission medium. Single-mode fiber patch cable is generally yellow with a blue connector, and a longer transmission distance, which has a small core and only one pathway of light. Multi-mode fiber patch cable is generally orange or grey, with a cream or black connector and a shorter transmission distance.
Inserted Core Cover
The connector's inserted core cover conforms to APC, UPC, or PC configuration. A UPC inserted core cover is flat and is used in SARFT and early CATV. An APC connector's inserted core cover is oblique (about 30, ±5 ). To reduce the back reflection of a connector, UPC polish. Industry standard is a minimum of –40dB for PC back reflection measurement and –50dB for UPC back reflection measurement. If even less back reflection is required, an APC might be necessary. An APC connector has an 8ºangle cut into the ferrule. These connectors are identifiable by their green color. An APC polished connector has an Industry Standard Minimum of –60dB measurement. APC fiber ends have low back reflection even when disconnected.
Connector Construction
Fiber optic connectors were introduced with fiber optic technology in the 1980s. A fiber optic connector is a flexible device that connects fiber cables requiring a quick connection and disconnection. There are many types of connectors—FC, SC, ST, LC, MT, MU, E2000, DIN4, etc.

According to these connectors, fiber optic patch cords can be divided intoSC patch cord, FC patch cord, ST patch cord, MT-RJ patch cord and LC patch cord, etc. The main differences among them are dimensions and methods of mechanical coupling. Organizations will standardize on one kind of connector, depending on what equipment they usually use.
Conclusion
Fiberstore offers various types of fiber optic patch cords including single-mode patch cords, multimode patch cords, as well as the SC patch cord, FC patch cord, ST patch cord, MT-RJ patch cord and LC patch cord, etc. 

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