2012年10月17日星期三
1000Base-SX Standard and 1000Base-SX SFP Module
An Ethernet standard that transmits at 1 Gbps. Used mostly to connect high-end workstations and servers as well as for network backbones, Gigabit Ethernet transmits full duplex from point to point using switches and half duplex in a shared environment (CSMA/CD) using a hub.
The first IEEE Gigabit Ethernet standard (802.3z) was defined in 1997 for use over multimode optical fiber and two years later for copper cables
1000BASE-SX is one of the IEEE802.3z standard made for the laser transceiver witch work on short wavelength multimode fiber (850mm). When use 62.5pm multimode fiber, link distances can be up to 260m; when use 50pm multimode fiber, connection distance up to 550m.
1000Base SX SFP is the small form hot swappable fiber optic transceiver, which work with multimode fiber for linking. When used with 62.5 MMF its max-working span is around 220 meters, when used with 50 MMF its max-working span is around 550 meters. Typical 1000Base SX transceivers like Cisco GLC SX MM and SFP GE S. the latter is with DOM support and extended working temperature.
The maximum distance between nodes is based on the type of transceiver and cable used as outlined below.
1000Base-SX (802.3z)
62.5 multimode 160 220
62.5 multimode 200 275
50 multimode 400 500
50 multimode 500 550
1000Base SX SFP tranceiver are used in Gigabit Ethernet and they are fully compatible with 1000Base-SX standards defined by IEEE. Fiberstore offer the 1000Base SX SFP transceiver modules, our products are fully compatible with IEEE 802.3z for Gigabit Ethernet and our optical transceivers are fully compatible to use with the equipment from other suppliers.
2012年10月16日星期二
Netgear AXM761 Transceiver Module Application
Netgear AXM761, One of netgear 10gb sfp+ transceiver module. It is 10GBASE-SR SFP+ module, Adds 10 Gigabit Ethernet short-reach LC fiber connectivity to the standard SFP+ interfaces. Fits into the two built-in 10 GE SFP+ interfaces of GSM7328S-200 and GSM7352S-200.
Features:
LC connector
Fits into the two built-in 10GE SFP+ interfaces of GSM7328S-200 and GSM7352S-200
10GBaseSR fiber technology is the same for XFP and SFP+ : one Switch equipped with XFP 10GBase-SR LC connectivity can uplink to another Switch equipped with SFP+ 10GBase-SR LC connectivity using the same fiber
Provides hot-swappable installation or removal
Fits into standard 10Gigabit SFP+ interfaces
Drives 10Gigabit Ethernet up to 300m distances with 50/125?m laser-optimized OM3 multimode fiber cables
Adds 10Gigabit Ethernet short-reach LC fiber connectivity to the standard SFP+ interfaces
Drives 10Gigabit Ethernet up to 33m distances with 62.5/125?m OM1 multimode fiber cables
Fits into the 10GE SFP+ interface of the SFP+ Adapter module AX743.
Fiberstore supply High quality Netgear AXM761 SFP+ sale with lowest price. which is an professional manufacturer & supplier of transceivers. All of our transceivers are tested in-house prior to shipping to guarantee that they will arrive in perfect physical and working condition. Get your Netgear AXM761 that we can approve it is 100% tested and guaranteed compatible with your Netgear switch and router. We guarantee our fiber transceiver to work in your system and all of our transceivers come with a lifetime advance replacement warranty.
2012年10月12日星期五
Fiberstore launched Netgear products
The latest Netgear products – such as netgear modules , netgear router has gone on sale, providing another option for customers seeking a complete, managed user experience.
Here I will introduce one kind of Netgear Router and Netgear module.
The Netgear MVBR1210C HSPA+ Mobile Broadband Voice Router, developed with Sierra Wireless, extends mobile voice service via its wired voice port.
As such, it allows mobile operators to deliver a compelling voice and data service offering to consumers by eliminating the need for fixed line voice service.
The router also delivers broadband access at speeds up to 21Mbps downstream and 5.7Mbps upstream – capabilities comparable to fixed broadband services.
It integrates a secondary Ethernet WAN to provide failover and back-up for network access, and for LAN connectivity, there are four Ethernet ports and high-speed N300 802.11n Wi-Fi.
The availability of the Netgear MVBR1210C represents “an important milestone” in extending mobile voice services into the home. The router fulfils the mobile industry’s long-envisioned conversion of voice services to principally mobile. This enables mobile operators to consolidate their voice service penetration by extending ‘mobile-to-mobile’ calling to home phones. According to IT analyst IDC, the global router marker saw 7.3 per cent quarter-on-quarter growth during Q4 2011.
The main netgear module i wiil tell you is the netgear AXM762 module, that is one of the hot products in the market. The negeat AXM762 tansceiver module is applicate 10ge ethernet, that is one of the netgear 10g modules. Adds 10 Gigabit Ethernet “long-reach” LC fiber connectivity to the standard SFP+ interfaces. Fits into the two built-in 10 GE SFP+ interfaces of GSM7328S-200 and GSM7352S-200. Fits into the 10 GE SFP+ interface of SFP+ Adaptor module AX743.
2012年10月11日星期四
Cisco GBIC Product Line Application
The word GBIC is an IT industry term which stands for Gigabit Interface Converter. A GBIC is a variety of Optical Transceiver, which is designed to convert serial electric signals into serial optical signals. GBIC modules are typically inserted into a network switch in order to connect a Fiber Optic system with an Ethernet system. The most common applications where GBIC modules are used include Fibre Channel and Gigabit Ethernet.
The GBIC is fully hot swappable, which adds to its flexibility and ease of installation. It has become a standard form factor for optical transceivers, and can support a variety of physical media, from legacy copper to long wave single mode fiber up to lengths of hundreds of kilometers
Cisco GBIC modules and 3rd party equivalent, MSA (Multi Source Agreement) compliant modules can be interchanged on a wide variety of Cisco products and can be intermixed in combinations of 1000BASE-T, 1000BASE-SX, 1000BASE-LX/LH, 1000BASE-ZX, 1000BASE-CWDM, or 1000BASE-DWDM interfaces on a port-by-port basis.
The WS-G5483 is Cisco’s 1000BASE-T GBIC product, which connects a GBIC port to Category 5 wiring using a standard RJ-45 interface. The maximum Category 5 wiring distance is 328 feet (100 meters).
The WS-G5484 is Cisco’s 1000BASE-SX GBIC product, which operates on legacy multimode fiber (MMF) optic link spans up to 1815 feet (550 m) and on laser-optimized multimode fiber (OM3) optic link spans up to 3281 feet (1 km).
The Cisco WS-G5486 is Cisco’s 1000BASE-LX/LH GBIC product, which allows for reaches up to 6.2 miles (10 km) over single-mode fiber (SMF) and up to 550 meters over multimode fiber (MMF).
The Cisco WS-G5487 is Cisco’s 1000BASE-ZX GBIC product, which operates on ordinary single-mode fiber optic link spans up to 43.4 miles (70 km) long. Link spans of up to 62 miles (100 km) are possible using premium single-mode fiber or dispersion shifted single-mode fiber. The GBIC provides an optical link budget of 21 dB – the precise link span length will depend on multiple factors such as fiber quality, number of splices, and connectors
2012年10月9日星期二
The bandwidth and window of Fiber optic cable
Optical fiber in theory, its bandwidth is infinitely high, the transmission capacity is infinitely large, the transmission distance is infinity. The lighter weight is almost perfectly signal transmission medium can simultaneously transmit N-way telephone, an N-channel TV signal …… However, current applications, fiber optic cable is farther with the theoretical difference. Fragile physical properties of silica aside aside, its transmission capacity is only open several windows.
In May 2002, ITU-T tissue optical band of the optical fiber communication system is divided into O, E, S, C, L, U6 a band. Known as the first window, single-mode optical fiber O with 2 window multimode fiber 850nm C with said window 3 L with 4 windows, E with 5 window. Multimode fiber and single-mode fiber communication band summary can be listed in the following table
Due to the lower prices of the LED light source, 850nm, 1300nm wavelength with multi-mode fiber optic cable to set up a small network of choice for laser light source 1310nm wavelength 1550 nm single-mode fiber optic cable can constitute the basis of a large network, if the single-mode fiber optic cable available window morewords, wavelength division multiplexing (MDM) will be a core fiber multi-wavelength optical signals transmit at the same time to achieve ultra-high speed transmission effect, so you can maximize the potential of the single-mode fiber optic cable. 2 core telephone line telephony and network use at the same time, by ADSL “cat” because voice and data use different frequency, wavelength division multiplexing (MDM) technology principle similar to ADSL technology, this technology is generally used in the bandwidth requirements of a higher position backbone.
Intelligent building applications, fiber optic cable is often close to support multi-mode-based, such as multi-mode fiber optic cable with the emission wavelength of 850nm or 1300nm LED light source, or 850nm VCSEL laser wavelength. Single-mode used in long distance system buildings, single-mode fiber optic cable with emission wavelength 1310nm or 1550nm FP or DFB laser, means that most of the fiber optic cable is only open a window.
The fiber optic cable can transfer window open, open a few, which are subject to dispersion, loss, DMD, PMD and other factors, but also with light sources and other network equipment. From a long-term perspective, the more support window cable in practicality, compatibility, scalability is higher.
Frequency band | Window | Wavelength range (nm) | Frequency range (THz) |
1 | 850(770-910) | ||
Original band | 2 | 1260-1360 | 237.9-220.4 |
Extended band | 5 | 1360-1460 | 220.4-205.3 |
Short wavelength band | 1460-1530 | 205.3-195.9 | |
Conventional band | 3 | 1530-1565 | 195.9-191.6 |
Longer wavelength band | 4 | 1565-1625 | 191.6-184.5 |
Ultralength wavelength band | 1625-1675 | 184.5-179.0 |
2012年10月7日星期日
Fiber Optic Splice Sleeves
Fiber optic splice sleeves are used on fiber glass joint point during the fiber optic fusion work, usually is after the fibers are melt, people use this splice protection tube on the melt point for further protection, its strengthen member inside the tube will make the fiber joint point stronger and it provide extra protection to the fiber joint point after the fiber optic fusion- it is waterproof and dust proof, and using such splice protection sleeves can reduce possible extra attenuations.
Fiber optic protection sleeve is made up of cross linked polyolefin heat-shrinkable tubes, hot melt tubes and Stainless steel needle,
which is specifically designed for the protection of fiber optical closure.
The types of Fiber Optic Splice Sleeves on our Fiberstore.
Single Fiber fiber optic splice sleeve
This type of fiber optic protection sleeve is used for protecting and supporting the fusion splice point.
Single Fiber fiber optic splice sleeve is with typical 40mm or 60mm length, with stainless steel rod as the strengthen member. Our Single Fiber Optic Splice Sleeves is easy to operate, reducing the risk of fiber damage during installationTransparent tube, it is easy to see the status of fiber optical closure.
Ribbon Fiber Optic Splice Sleeves
This fiber optic splice sleeves are used for ribbon optical fiber fusion protection, its max capacity is for 12 ribbon fibers. The ribbon fiber optic splice protection sleeves use ceramic components as the strengthen member, the whole splice sleeve typical length is 40mm. We also provide this kind of protection sleeves with 1000pcs/pkg and good price. Welcome contact us.
FS-4212: Ribbon Fiber Fusion Splice Protection Sleeves with Ceramic Rod-12 fibers.
Fiberstore have ready stock of standard 40mm and 60mm length splice protection sleeves for immediate shipment, and we can make custom length types with fast delivery. Buy fiber optic supplies from Fiberstore with conficence
2012年9月28日星期五
Underground cable fault locator function
With the accelerated process of urbanization and the rapid development of the industry, Cables has become the “lifeblood” of the city as well as the “nerve” of the industrial production. More and more underground cable as for the load was increased, their own aging and barbaric construction lead cable often fails is not the normal power supply, thus affecting the living and plant shutdowns, immeasurable loss is caused by the mining hospitals and other research units.
To find the problem and restore the power are most concerned event in timely. After the efforts of the researchers invented such instruments. The instrument consists of three parts of the transmitter, the routing locator, fault locator. Is a versatile instrument used to check the the underground cables trend, depth and failure.It can in the case of not dug casing, easily and accurately detect underground cable towards the depth and the exact location of the short circuit and open circuit, so that the entire cable ground without excavation.
The Features of underground cable fault locator
1, small size, light weight, easy to carry
2,detection method is simple, easy to maintain, with automatic protection function
3, low supply voltage and applicability
4, transmitter power, high efficiency;
5detection error is small, anti-interference ability
6, stable and reliable performance
It is the department of communications, electricity, railways, factories, mines, and utilities, maintenance checks to ensure the construction quality inspection of underground cables and the point of failure, an accurate, reliable cable positioning instrument.
Fiberstore NF-816 underground cable locator is very easy to use. It can rapidly find the target wire from among plenty of network wires. you just need to Compare the volume of the “tout” sound and the brightness of the signal indicator. Then you can find the target wire which has the highest volume and brightest indicator.
You can buy other network cable tester with high quality but low price. Fiberstor supply all types telecommunications industry products and equipment.
2012年9月27日星期四
Fast Ethernet SFP Module- FE SFP Module
Fiberstore offers a range of Fast Ethernet SFP Interface Converters. Fast Ethernet SFP module - FE SFP Modules. The product portfolio includes 100BASE-FX, 100BASE-LX, and 100BASE-BX SFPs.
100BASE-FX: SFP operates on ordinary multi-mode fiber optic link spans of up to 2km in length.
100BASE-LX: SFP operates on ordinary single-mode fiber optic link spans of up to 10km in length.
100BASE-BX: SFP operates on ordinary single-mode SINGLE STRAND fiber optic link spans of up to 10km in length. A pair of a 100BASE-BX-D and a 100BASE-BX-U SFP is needed for the single strand deployment.
Fiberstore offers two different types of 100M SFP compatible Cisco:
100M SFP for Fast Ethernet (FE) SFP Port. The SFP product name contains a “FE”.
100M SFP for Fast Ethernet (FE) SFP Port. The SFP product name contains a “FE”.
Cisco GLC-FE-100BX-U – 10km, 20KM, 40km, 80km Compatible 100BASE-BX10-U SFP Transceiver Module
Cisco GLC-FE-100LX-RGD-100Base-LX SFP Transceiver Module
Cisco GLC-FE-100FX-RGD-100Base-FX SFP Transceiver Module
Cisco GLC-FE-100BX-D – 10km, 20KM, 40km, 80km Compatible 100BASE-BX10-D SFP Transceiver Module
100M SFP for Gigabit Ethernet (GE) SFP Port. The SFP product name contains a “GE”.
Cisco GLC-GE-100FX- 100Base-FX SFP Transceiver Module
FiberStore is an professional manufacturer & supplier of fiber transceivers. All of our transceivers are tested in-house prior to shipping to guarantee that they will arrive in perfect physical and working condition. We guarantee transceivers to work in your system and all of our transceivers come with a lifetime advance replacement warranty.
If you have questions about optics, please feel free to contact us at sales@fiberstore.com.
2012年9月26日星期三
Optical module can bring billions of dollars
one of the most popular products – fiber optic transceiver. The contract manufacturers CEM are two shiny. According to industry watchers, CEM Once you’ve mastered the complex optical interconnect technology and related accessories manufacturing technology each year will be able to win billions of dollars in revenue. Observers say that, even if the optical fiber Internet technology is still in the development phase, but it will still be the fastest growing areas in the huge market in the communications industry.
“The market is very strong demand for cheap and high-quality fiber optic module.” Jon Peddie Associates analyst Jon
Peddie said. The fiber-optic module is mainly used in high-bandwidth telephone lines, Internet access and other communications-related applications. During transmission of the light signal by means of a series of devices to accomplish various functions, including the signal generator, the guide, separation, regeneration, amplification, loading, Synthesis, emission, reflection and re-directing. Merrill Lynch analyst Thomas B. Astle said. “We believe that optical technology is one of the fastest growing areas in the telecom market. Estimated that in 2002, the annual growth rate of the overall market will reach 40%,” he added.
Dataquest, said fiber optic transceivers reached $ 6 billion in sales revenue in 1999. Its analyst Stan Bruederly of that sales revenue will reach $ 7.6 billion this year, and will reach $ 12 billion by 2003.
This demand situation has made some OEM telecommunications and networking products as well as some components suppliers, began to transfer their production of fiber optic devices to CEM technology. Nortel Networks, for example, last year, part of its own fiber optic outsourcing to SCI Systems, analysts have estimated annual revenues of $ 1.5 billion will bring SCI.
However, the SCI Corporation Nortel spokesman declined to answer whether the production of fiber-optic module, or just processing for the Canadian telecommunications giant light board. He just said: “part of our optical networking products have been outsourced processing.
Merrill Lynch analyst Jerry Labowitz said, another high-grade fiber-optic devices and fiber optic module manufacturer JDS Uniphase, are also being considered less complex fiber module production outsourcing to a CEM.
JDS Uniphase, a major cause of the rapid development of the internal core force of aggregation, the company’s Chief Financial Officer Anthony Muller said. Another reason is that CEM has been a year ago mastered more fiber module production technology.
“Technologies are relatively well-understood,” Anthony Muller said, “We are more concerned about the CEM is how do, how to train them harder and faster to meet the needs of the user.”
Engaged in the optical networking business, Alcatel, Ciena network, Corning, Lucent Technologies, NEC, and Sycamore Networks, Inc..
Lucent spokesman said the company does not intend to outsourcing fiber optic transceiver production. The company recently announced that, in order to meet the growing market demand for high-speed optical communication network devices, the company will spend $ 40 million to expand its production capacity in Southern California.
“Some OEM to develop rely on the manufacture of fiber optic devices, and they do not want to do anything else.” Said Srivinas Rao, Solectron’s vice president of technology. The company is one of the world’s largest CEM.
For competitive reasons, some OEM suppliers require their outsourcing the processing partner not to disclose the level and types of the production of optical devices. This is the CEM as several well-known production of Jabil Circuit, SCI and Solectron its contracted fiber optic devices do not want to talk about. Jabil’s positive efforts to become a leader in the optical components market. We hope that the optical components market in significant growth in the coming period, Jabil, a spokesman said.
In the last year, CEM supplier Celestica and optical networking company Sycamore Networks signed a two-year-old contract. However, Celestica Company Chairman and Chief Executive Officer Eugene Polistuk unwilling to disclose the inside information processing for Sycamore. In addition to the production of optical devices, Celestica also two other factories to provide high-tech optical module welding services. “Polistuk said:” This is a whole new field, it has become a hot spot. ”
The fiber optic module is a part of the production process of the entire processing, said Solectron’s company Rao. “It’s just being a hot chase, but does not represent the entire market.” He added.
This market can be divided into three stages: the Wavelength Division Multiplexing (WDM) for WAN, LAN WDM MAN WDM.
“We are in the middle of the first stage, WAN WDM is the use of fiber-optic network constructed fiber optic cable infrastructure,” Merrill Lynch Astle said, “At this stage, including the rapid development of the submarine communication system, it will solve the intercontinental bandwidth bottleneck problem. ”
“The local WDM and Metro WDM market rise estimated for this year and next year, the main driving force is the ISP constantly want to build local area networks and metropolitan area networks using WDM technology,” Astle said, “We estimate that the arrival of the third stage of the between the years 2002-2004, when a full-mesh optical networks, and all light-based switching and routing. ”
CEM are already prepared for this. “We are in contact with a lot of companies,” said Chairman and CEO Michael Marks of Flextronics, “We do the processing of the light board, but does not provide light welding services. Now we are to strengthen our capacity in the optical networking and user contact . “
2012年9月25日星期二
What are fiber optic loopback modules
Fiber Optic Loopback modules are also called optical loopback adapters. There are LC loopback modules, SC loopback modules and other types.
They are designed for testing, engineering and the burn-in stage of boards or other equipment. Optical loopback adapters provide system test engineers a simple but effective way of testing the transmission capability and the receiver sensitivity of network equipment.
Fiber Optic Loopback Modules are designed for testing and engineering purposes. Fiber Optic Loopback Modules provide system test engineers with a simple but effective way of testing the transmission capability and receiver sensitivity of fiber optic network equipment. Fiber Optic Loopback Modules may also be used for the burn-in stage of boards and other equipment. Fiber Optic Loopback Modules incorprate two fiber optic connectors. One fiber optic connector is plugged into the output port, while the other fiber optic connector is plugged into the input port of the equipment.
:: How to use:
One connector is plugged into the output port, while the other is plugged into the input port of the equipment.
:: Other Information
Fiber Optic Loopbacks are designed to provide return patch for a fiber optic signal. They are used for fiber optic testing applications or network restorations.
When used in testing applications, loopback signals are used for diagnosing problems. The best practice is to send a loopback test to network equipment, one at a time for isolating the problem.
Fiber optic loopback modules are made with a variety of fiber cable jacket types and cable diameters. We provide fiber optic loopbacks according to industry standard, all products are fully tested before shipping.
Fiber optic loopbacks are designed in a compact footprint. They are compliant with fast Ethernet, fiber channel, ATM and Gigabit Ethernet. Common fiber optic loopbacks types are: SC fiber optic loopback, FC fiber optic loopback, LC fiber optic loopback, MT-RJ fiber optic loopback.
Fiber Optic Loopback Specifications:
Insertion loss: Less than 0.2dB
Exchangeability = 0.2 (500 cycle passed)
Operating temperature range: Less than 0.2 dB ( -40 to +80°C)
What types of Fiber loopback modules are available?
The most popular types of fiber optic loopback modules are SC, LC, FC and MTRJ connector types. But each connector type is divided again by fiber type, connector polish type and attenuation.
>>Fiber Types
Each connector type is available for three fiber types. They are 10G OM3 50/125um multimode, OM2 50/125um multimode, OM1 62.5/125um multimode and 9/125um single mode.
>>Connector Polish Types
Only PC polish is available for multimode type fibers. But for single mode fiber, two connector polish types are available: UPC polish and APC polish.
>>Working Wavelength
In addition to fiber type, working wavelength is the other important factor for choosing the correct fiber optic loopback module for your specific application. Available wavelengths are 850nm, 1310nm and 1550nm. 850nm and 1310nm are for multimode applications and 1550nm is for single mode applications.
2012年9月24日星期一
The core components of the fiber connector: ceramic ferrule
What is ceramic Chaxin?
Ceramic ferrule’s main material ceramic. Ceramic ferrules must be used in optical fiber communication, it is a very important role to ensure the communication quality.
Fiber connection technology is divided into two categories, one is permanently connected, often called fixed joints dead joints; other is a removable activities connect, often referred to as the union, need to use the fiber optic connector. In the transmission network, a cable connection between the permanent connection, the optical fiber connector is mainly used to implement the system between devices, between the equipment and instruments, equipment and between the optical fibers and the optical fibers and optical fiber between nonpermanent the fixed connection, it is the optical communication system of the most widespread and the largest use of basic passive devices. Matching ceramic material with quartz fiber thermal, physical and chemical properties and stability, as the core device with ceramic ferrule fiber optic connectors has been developed rapidly.
The ceramic ferrule most important role is to achieve the physical docking of the optical fiber (also known as fiber cold continuation), often used in conjunction with ceramic sleeve. Ceramic cylindrical tube fired zirconia ceramic ferrule, hard texture, delicate white color accuracy of the finished sub-micron level, is the most commonly used in optical fiber communication network, the largest number of precision positioning pieces, often used for the manufacture of the optical connector, the optical coupling of the devices, and the like.
Like the circuit in the plug and receptacle, the ferrule and the sleeve are the key components of optical fiber connector. The diameter of only 0.125 mm optical fiber must pass through the inner bore of the ceramic ferrule, and to maintain a linear transmission of the state; connected to the outgoing optical fiber in the other end of the ceramic ferrule. Straight and precise connection directly affect the transmission efficiency of the optical fiber. Ceramic ferrule is not only highly internal hole diameter, while the outer diameter and concentricity requirements higher. And the optical connector because of the need for multiple plug, after repeated use must maintain the same accuracy of the same, very high demands on the material density.
The ceramic ferrule classification and features
Ceramic ferrule in accordance Dimensions is divided into three categories of SC, LC, and non-standard, in accordance with its precision, can be divided into two kinds of single-mode and multimode. The industry is often referred to as SC singlemode ferrule, SC multimode ferrule, LC singlemode ferrule, LC multimode ferrule, non-standard mortise.
The ceramic ferrule characteristics depend on the characteristics of the material zirconia, mainly reflected in the good thermal stability, high hardness, high melting point, and wear-resistant, high machining accuracy.
PON technology development history
The Passive Optical Network – PON mainly uses a passive optical power divider (coupler) for forwarding information to the respective users. As a result of the optical power splitter, so that the power reduction, and therefore more suitable for use for short-distance.
PON (passive optical network) refers to ODN (optical wiring network) does not contain any electronic devices and electronic power, ODN all composed by the optical splitterand other passive components, active electronic devices without precious. A passive optical network includes a mounted on the optical line terminal (OLT) of the central control station, as well as a number of supporting the optical network units (ONUs) installed in the customer premises. The optical distribution network (ODN) between the OLT and the ONU includes optical fiber and passive optical splitters or couplers.
PON technology development
APON (ATM PON)
1995 FSAN (Full Service Access Network) alliance in 1996 by 13 major network operators and their equipment suppliers, 155Mb / s PON system technical specifications, ATM transport protocol, ITU-T G.983 series of standards
BPON (Broadband PON)
2001, APON standard was later strengthened to support 622Mb / s transfer rate, coupled with dynamic bandwidth allocation, protection and other functions, to provide Ethernet access, video transmission, high-speed leased line business broadband PON
GPON (Gigabit PON)
The FSAN Union rate over 1Gb / s PON standard research, would like to propose a program can run in a higher rate, but also in terms of multi-service, OAM & P, and scalability compared to other PON efficiency high. This study makes Gigabit PON (GPON) appears. In January 2003, ITU-T approved established GPON standard G.984.1, G.984.2 and G.984.3
EPON (Ethernet PON)
A new type of fiber-optic access network technology, it uses point-to-multipoint structure, passive optical fiber transmission, offers a variety of services on top of Ethernet. PON technology is used in the physical layer, the topology used in the link layer Ethernet protocol, the use of the PON realized Ethernet access. Therefore, it combines the advantages of PON and Ethernet technology: low cost; high bandwidth; scalable, flexible and rapid service reorganization; compatibility with existing Ethernet; convenient management.
Buy fiber optic supplies from GPON and EPON maufacturer, we also supply CWDM module, DWDM module for GPON and EPON system.
2012年9月13日星期四
What Is The Difference Between cat5e and cat6 Patch Cords
Cat 5e: Cat 5e (which stands for Category 5, enhanced) cable goes along the same lines as basic Cat 5, except that it fulfills higher standards of data transmission. While Cat 5 is common in existing cabling systems, Category 5e has almost entirely replaced it in new installations. Cat 5e can handle data transfer at 1000 Mbps, is suitable for Gigabit Ethernet, and experiences much lower levels of near-end crosstalk (NEXT) than Cat 5.
Cat 6: Of the three cable categories we’re discussing, Category 6 is the most advanced and provides the best performance. Just like Cat 5 and Cat 5e, Category 6 cable is typically made up of four twisted pairs of copper wire, but its capabilities far exceed those of other cable types because of one particular structural difference: a longitudinal separator. This separator isolates each of the four pairs of twisted wire from the others, which reduces crosstalk, allows for faster data transfer, and gives Cat 6 cable twice the bandwidth of Cat 5! Cat 6 cable is ideal for supporting 10 Gigabit Ethernet, and is able to operate at up to 250 MHz. Since technology and standards are constantly evolving, Cat 6 is the wisest choice of cable when taking any possible future updates to your network into consideration. Not only is Category 6 cable future-safe, it is also backward-compatible with any previously-existing Cat 5 and Cat 5e cablingfound in older installations.
The major difference between Cat5e and Cat6 is the quality of performance they provide. Cat5e is typically used for networks using 100 Mbit/s or a gigabit network, with performance of up to 100 MHz. For networks that can handle up to 250 MHz, you would want to make use of Cat6 cabling, as it offers more than twice the performance of a Cat5e. Although Cat6 may be able to handle greater data loads than Cat5e, it’s always best to use the proper patch cord to match the cabling in your building; it pays to find out what is already in use at your location before installing the network.
Are Cat5e and Cat6 Compatible?
You may be asking yourself ‘What if my building is set up to use Cat5e but all I have are Cat6 patch cords? Am I still able to use them?’ The answer to the question would be ‘Yes, you can!” As stated before, it’s preferential to match cable types; however, it is possible to mix and match Cat5e and Cat6 if necessary. If you’re unsure of the wiring of the building, you may also want to go with Cat6. To ensure maximum performance, you will want to use the best components possible all throughout the network.
2012年9月12日星期三
How To Get Your Computer Optimization
Nobody likes a slow running computer, especially when you don’t have the funds to go out and get an entirely new unit, and it may be frustrating to watch your computer’s performance falter without the knowledge to do something to rectify it on your own. Without needing to really go too far outside of your comfort zone and spend a great deal of energy learning an entire new skill set in the process, but you may be surprised to find out just how simple it may be to make a few of these enhancements on your own.
It may be for many reasons if your unit is running slowly, so completing the necessary homework ahead of time might be crucial and result in saving you quite a bit of time and money when it comes to finding a solution. If you find that it is a software problem, you can probably just download new drivers and fix the issue that way, but if it’s a hardware issue, there are a couple things you might do to increase your device’s efficiency.
Letting you send and receive data at a faster pace, the simplest solution would be to just purchase a new router or modem with a higher signal output, but there are also some other choices for those who’re open to getting a little more up close and personal with their unit. You will find a more reliable, quicker connection with less lag and a more steady data transfer rate letting you stream video and work a lot faster than you were before by upgrading to any more powerful Cisco SFP modules.
You can even go a step further than that by looking at other transceivers that surpass the performance ability established by SFP transceivers for those that are more aggressive when it comes to their unit’s performance. You may install any Cisco GLC T module in its place, for instance, with both components being of the same dimensions as well as being swappable hot form pluggable and even more dependable than their counterparts. Supplying a stream of information much more stable than you are probably experiencing presently, there modules may function at a rate of ten, one hundred, or one thousand Mbps speeds through up to one hundred meters of unshielded twisted-pair Ethernet cable.
These are only some the choices available to you in order to boost your computer’s performance, but in order to get a better sense of what you can do, identify where your current issue lies, and then do the necessary research needed in order to discover if it is something you can take care of on your own; the results might surprise you.
Effective Fiber Optic Communications Equipment-CWDM
The use of fiber optic cables for communication has opened up gates for communication multiplexing technologies that maximize the capabilities at minimum costs. Coarse wavelength division multiplexing, or CWDM, modulates different wavelength laser beams with multiple signals. In effect, this means maximized use of a single fiber optic to transmit and receive a large number of signals, minimizing costs for telecom companies. Companies simply use the right optical amplifiers, multiplexers and de-multiplexers to enhance capacity of the fiber optic using CWDM technology.
Related technologies are dense wavelength division multiplexing (DWDM) and conventional WDM. Conventional WDM use the 3rd transmission window with a wavelength of 1550nm, accommodating up to 8 channels. DWDM is the same but with a higher density channel. Systems may use 40 channels, each at 100 GHz spacing or 80 channels spaced 50 GHz apart. A technology, the ultra dense WDM is capable of working at a spacing of only 12.5 GHz, allowing more channels. DWDM and WDM are expensive in contrast to CWDM.
In CWDM technology, there is an increase in channel space. This translates to requirement of less sophisticated and less costly transceiver devices. Operating in the same window of 1550 nm and making use of OH-free silica fibers, maximum efficiencies are achieved in channels 31, 49, 51, 53, 55, 57, 59 and 61. The channels are spaced 20 nm apart. DWDM spaces them 0.4 nm apart. Less precision optics and lower cost, uncooled lasers with lower maintenance requirements can therefore be used in CWDM devices, operating in the region of 1470, 1490, 1510, 1530, 1550, 1570, 1590 and 1660nm. 18 different channels can be used with wavelengths up to 1270 nm. In addition to being cost effective, power consumption for laser devices used in CWDM technology is also far less.
CWDM signals cannot be transmitted long range but are perfect for applications within a range of 60 km such as in a city and for cable television networks allowing upstream and downstream signals.
A number of manufacturers offer all related CWDM multiplexers, demultiplexers and optical amplifiers. Networking solution providers are the right people to seek guidance for use of CWDM, DWDM or WDM technology. Networking solution providers carry out the entire installation and commissioning of the right, integrated devices for error-free high speed, high data transmissions over fiber optic lines. Cost and performance optimized CWDM solutions with built in expansion capabilities are available from reliable and trusted online network solution companies. Choose the right one with years of experience and technological expertise to provide the right CWDM solution.
Fiberstore is an China company that specialises in selling quality network connection parts. All of our Cwdm module and Cwdm sfp have a best warranty and very competitively priced as well as being of the highest quality. So you can buy our products with confidence
2012年9月5日星期三
1xN Mechanical Optical Switch offered by Fiberstore
Optical Switch is a switch that enables signals in optical fibers or integrated optical circuits to be selectively switched from one circuit to another. It is mainly used in Optical Add /Drop, Optical Cross Connection System, and Optical fiber ring protection.
Optical switch may operate by mechanical means, such as physically shifting an optical fiber to drive one or more alternative fibers, or by electro-optic effects, magneto-optic effects, or other methods. Commercially available optical switches, either in MEMS or in mechanical, types have a standard switching speed of 2 ms or 5 ms.
Fiberstore Optical Switches are base on Opto-Mechanical Technology with Proven reliability. Our Optical switch are designed for use in re-configurable optical add/drop multiplexers optical cross-connect systems and network switching for fault protection and restoration application, Collimated lens sand a moving mirror minimize insertion loss and improve the repeatability and stability of the switch parameters. The switch itself is directly mounted on printed circuit boards (PCBs), and is equipped with status contacts to provide an electrical readout of the switch position.
Latching operation ensures that the switch remains in position following power loss.
Fiberstore mechanical optical switch Series is GR-1221 qualified and designed for use in central office network applications. This reliable, miniature optical component is available as a 1×1, 1×2, 1×2 dual core, 1xN, 2×2, 2×2 dual core optical Switch.
Fiberstore 1xN Mechanical Fiber Optic Switch support all wavelength at 1260nm~1650nm, it offers ultra-high reliability, low insertion loss, fast switching speed as well as bi-directional performance. The optical switches are widely used for Optical Network, Protection, Transmitter and Receiver Protection,Network Test System and Instrumentations.
Using the GLC-SX-MM to Expand Communication Networks
With the rise of communication standards, global companies now come face-to-face with the fact that they have to upgrade their network systems. This way, they get to support data transform in any form. This is where periphery components like the cisco glc-sx-mm come in handy.
The GLC-SX-MM is a hot-swappable tool that connects a Gigabit Ethernet interface, as well as the video machine to the main harbour with the multilevel. It is also commonly used between switches, Wireless LAN Controllers, and firewalls. It is a Short Form-Factor Pluggable that works well with a wide variety of products and services, and can be mixed and matched on a port-by-port basis. This makes it quite competent in either simple or extremely complex networking environments. On top of that, the GLC SX MM has high performance modules that sustain a data-rate of 1.25 Gbps. For multi-mode fibers, which is one of the most commonly installed types in corporate settings, it can transmit data up to 500mm.
SFP transceiver usually come in different models. This allows the user to customize and configure the system in a way that it gets proper optical reach, either with multi-mode or single-mode optic fiber cables. The four categories of SFP modules are the SX, which is 850nm, the ZX, which is 1550 nm, the LX which is 1310 nm and theDWDM. They are typically made with copper cable interfaces, which allow a host device to connect via unshielded twisted-pair network cable. The CWDM can also be used through single optic cables, and they are 1310/1490 upstream and downstream.
There are several known producers of SFPs and it is important that you get to know these brands, especially Cisco, if you’re planning to expand your network. That way, you get to acquire the right kind of gear that would complement your system. If you are looking to buy these things, you might as well stick to only one manufacturer, so that compatibility issues don’t arise. Despite the generalization of the IEEE standards that made parts more flexible and inter-changeable for various networking needs, there is still minimal guarantee that Avaya networking products would work with Netgear and Cisco gadgets. Now, since Cisco is one of the pioneering companies and established brands when it comes to network systems with 28 years of service, customers can rest assured that they will automatically work in any network set up and that in-house engineers will know how to configure them to stabilize the linkages.
When buying SFP transceiver and supporting network tools, one can expect costly investments as these do not come cheap. However, with thorough research, it is possible for a company to get good prices for their purchases. It is essential, though, that they get expert advice first, before any transaction is made. That way, the desired outcomes are insured, and delays, as well as excess expenses will not be realized. The internet provides expansive information on network systems, as well as reliable retailers of networking accessories. Thus, you won’t have to break a sweat in looking for those exact pieces you require.
Traditional Epoxy and Polish Connectors Advantage and Disadvantage
These old fashioned tried and proved fiber connectors have the highest reliability and best proven record. Each connector’s overall cost is the least among all types of fiber optic connectors.
The typical installation time is about 2 minutes each fiber optic connector and involves epoxy injection, epoxy curing with a heat oven, connector crimping and polishing.
The majority of fiber connectors today use this approach enjoying improvements that apply to better epoxy and polishing procedures. The tensile strength meets EIA/TIA standards of 20lbs and the installer can polish the ferrule to the desired satisfaction. This connector takes longer to install but costs less.
Advantage:
Lowest per connector cost
Highest quality and reliability
Disadvantage:
Whole set of tools
Assembly time is longer (2 minutes)
The technician doing the job needs to have good training and experience
Applications:
This type of connector is suitable for large volume connector installation (to save cost) and production floor. Or if your job requires definitely the highest reliability.
Common problems and solutions of Fiber Media Converter
1.Power light does not shine
Power failure
2.LOS lights must have the following breakdown:
(A) has a broken cable from the engine room to the client;
(B) SC pigtail is not plugged in Media Converter slots or has been disconnected.
3.Link light does not shine there may be the following:
(A) Check whether the fiber optic lines breaker
(B) Check whether the fiber line loss is too large, over a range of equipment receives
(C) Check that the fiber optic interface is properly connected, local TX and RX distant connection, distant TX RX local connection.
(D) Check the fiber optic connector is inserted into the device interface, Fiber patch cord type match with the device interface, device type and fiber match, whether the equipment transfer length matches the distance is intact.
4. Circuit Link light does not shine failure may be the following:
(A) Check whether the cable disconnection
(B) Check whether the connection type match: network cards and routers, and other devices use a crossover cable, switches, hubs, and other equipment using the straight line.
(C) checking equipment transfer rate matches
5. Network packet loss the serious possible failure are as follows:
(A) transceiver electrical port and network device interface, or both ends of the device interface duplex mode mismatch.
(B) twisted-pair RJ-45 head detect
(C) optical fiber connection jumper alignment device interface, pigtails and jumpers and coupler type matches.
6. Fiber Media Converter connect both ends can not communicate
(A) Fibre reverse the TX and RX are connected to the optical fiber swap
(B) RJ45 interface with external devices not connected properly (note that direct splicing)
Optical fiber interface (ceramic ferrule) do not match, this failure is mainly reflected in the transceiver 100M with optical mutual control function, such as APC ferrule pigtails received PC ferrule on the transceiver can not communicate properly, but then non- the photoelectric interaction control transceiver has no effect.
7 when the pass off phenomenon
(A) may be too large, for the optical path attenuation available optical power meter measuring the optical power of the receiving end, ,1-2dB in the vicinity of the scope of the receiving sensitivity range can be substantially determines the optical path failure
(B) Switch connected to the fiber converter may be failure, the switch replaced PC, the two transceivers connect directly with the PC, both ends of the PING, Failure to appear when the pass off phenomenon basic judgment of switch failure
(C) fiber converter may be failure at both ends of the converter then PC (not through a switch), both ends of the PING no problem, from one end to the other end of the transfer a large file (100M) above, observe it the speed, as the speed is very slow (less than 200M file transfer for more than 15 minutes) can be basic judgment transceiver failure.
8. Communication for some time after the crash, that can not communicate back to normal after re-starting
This phenomenon is generally caused by a switch to switch on all data received CRC error detection and length check, check out the error packets will be discarded, the correct packet will be forwarded out. Some of the process error packets can not be detected in the CRC error detection and length checksum this packet forwarding process will not be sent out, it will not be discarded, they will accumulate in the dynamic cache (buffer), can never be sent accumulation in wait until the buffer is full, it will cause the switch to crash the phenomenon. Because transceiver restart or re-starting switch can make communication back to normal, so users often think that the problem of the transceiver.
9. Fiber media converter test methods in order to find out the cause of the malfunction
(A) the proximal end of test:
Both ends of the computer on the PING PING through that fiber media converters. Proximal test is not a failure of communication can be judged for fiber optic transceivers.
(B) Remote Test:
Both ends of the computer whether normal and fiber media converters transmit and receive power whether the allowed range of PING, PING not General must check the optical path connection. PING the General Clauses prove optical path connection. The problem is to determine fault in the switch.
(C) Remote test to determine the point of failure:
First one end of the switch, both ends of the PING if no fault can be judged by the fault of the other switches.
2012年8月29日星期三
Fiber media converter using note
Fiber media converter have a variety of different classification, but note that most of the actual use of class distinction according to different fiber optic connectors: SC connector media converter and FC / ST media converter .
Fiber media converter to connect the different devices must use different ports.
Fiber media converter to connect the different devices must use different ports.
1, the fiber converter to 100BASE-TX equipment (switches, hubs) connection:
Verify that the length of twisted pair up to over 100 m;
RJ-45 port to connect one end of the twisted pair to fiber converter (Uplink port), the other end of the set (switches, hubs) 100BASE-TX RJ-45 port (port).
Verify that the length of twisted pair up to over 100 m;
RJ-45 port to connect one end of the twisted pair to fiber converter (Uplink port), the other end of the set (switches, hubs) 100BASE-TX RJ-45 port (port).
2, the fiber converter to 100BASE-TX device (NIC) connections:
Verify that the length of twisted pair up to over 100 m;
RJ-45 port to connect one end of the twisted pair to Fiber media converters (100BASE-TX port), the other end of the RJ-45 port, network card.
Verify that the length of twisted pair up to over 100 m;
RJ-45 port to connect one end of the twisted pair to Fiber media converters (100BASE-TX port), the other end of the RJ-45 port, network card.
3, fiber converter to 100BASE-FX connection:
Verify that the fiber length does not exceed the range of equipment to provide distance;
Verify that the fiber length does not exceed the range of equipment to provide distance;
SC / ST connector, one end of the fiber with fiber media converters SC / FC / ST connector on one end to connect the 100BASE-FX device.
Also need to add is that many users in the use of fiber media converters that: as long as the length of the fiber is in the single-mode fiber or multimode fiber can support a maximum distance can be used normally. In fact, this is a wrong perception, this understanding is correct only when connected devices are full-duplex device, when there are half-duplex device, the optical fiber transmission distance there are certain restrictions.
2012年8月28日星期二
How to buy fiber media converter
An important factor in the actual procurement, enterprises consider price, especially small and medium enterprises and SOHO office. We believe that a few hundred dollars of products sufficient to meet the general needs of enterprises, except for special industries such as telecommunications, military and so on. Of course, in addition to price, but also must consider the product with the surrounding environment compatibility with and the product itself, the stability, reliability, otherwise the price is low, buy also no use. In order to be able to pick a good product, and to procurement points are listed below:
(1) if it can support full-duplex and half duplex, because some chips of the market, using the full-duplex environment, can not support half-duplex, connected to the other brands of switches (N-Way Switch) or hub (HUB), using half-duplex mode, will result in a serious collision and packet loss.
(2) whether it is done connection test with other fiber optic connectors, currently available fiber media converter more and more, such as the mutual compatibility of the different brands of the fiber converter not done in advance of the test also have lost packet transmission time is too long, suddenly fast suddenly slow phenomenon.
(3) whether it has to prevent loss of safety devices, many manufacturers in the production of fiber media converter, in order to reduce costs, often using the register data transfer mode, the greatest disadvantage of this way, data transmission instability, resulting in packet loss, and the best way is to use a buffer circuit design, safe to avoid data loss.
(4)whether the product has to do temperature testing, fiber media converter used to produce high fever, coupled with the installation environment is usually outdoors, so the temperature is too high (not greater than 50 ° C), fiber media converter whether the normal operation, users are very important factors to be considered! The maximum allowable operating temperature is how much? This very worthy of our attention to the needs of long-running equipment.
(5)whether the product is in compliance with IEEE802.3 standards? Such as fiber media converters comply with IEEE802.3 standard, if you do not meet the standard, then certainly there will be compatibility issues.
(6) to assess the manufacturer’s service, Imagine if your equipment is broken, the factory a few days do not solve the problem, your loss is how much. Therefore, in order to make after-sales service timely early response, it is recommended to select the region has superb strength, technical strength, reputable professional company. Only the more experienced professional technical engineers to troubleshoot and detect failures of the more advanced tools
(7) When you purchase carefully observe the appearance of the product, take a look at the fiber module shell whether old, whether shiny or whether the signs of wear. On the market today in order to reap huge profits, many manufacturers use in fiber media converters, optical switches and other equipment used or old fiber optic module, the use of these second-hand fiber-optic module products, caused a great deal of hidden network transmission, such as: Fiber module optical contamination of the signal transmission must be affected, the decline in the quality of transmission. Transmission quality, result in reduced receive sensitivity can also cause data loss phenomenon. Coupled with the use of used fiber transceiver, will be discounted on the life of component failure, etc. at any time.
2012年8月27日星期一
How to choose a fiber media converter
Fiber media converter data transmission break the limitations of the one hundred meters of Ethernet cable, rely on high-performance switching chips and large-capacity cache, in a truly non-blocking transmission switching performance at the same time, it also provides a balanced flow, isolation, conflictand detection of errors and other functions to ensure high security and stability of data transmission. The fiber media converter products for a long time will remain an indispensable part of the actual network set up, I believe that future fiber media converter will be toward the high intelligence, high stability, managed, low-cost direction to continue to develop.
How to choose a fiber media converter
Fiber Converter is one of the LAN connection device, it is necessary to consider the mutual compatibility with the surrounding environment, and product stability, reliability.
1, whether to support full-duplex and half duplex?
Some chips on the market currently only use full-duplex environment, can not support half-duplex, such as the receipt of other brands of switches (SWITCH) or hub (HUB) And it is using half-duplex mode, will causeserious conflict and loss.
2, Connection test with other fiber media converter is done or not?
An increasing number of currently available media converter, such as the mutual compatibility of different brands of media converter in advance did not make the test will produce loss, the transfer time is too long, suddenly fast and slow phenomena such as.
3,Whether there is a safety device to prevent packet loss?
Some vendors in the manufacture of fiber media converter, in order to reduce costs, often the data transfer mode register (Register), this approach is the biggest drawback is instability in the transmission, packet loss, and the best is to use the buffer line.can be safe and to avoid data loss.
4,Temperature adaptability?
Fiber media converter, when used, will produce high fever, high temperature (not greater than 85 ° C), fiber media converter is working properly. Is very worthy of the factors that customers consider!
5,conforming to the IEEE802.3u standard?
Such as fiber media converter comply with IEEE802.3 standard, that the delay time control in 46bit, it means that the transmission distance of fiber media converter will be shortened if more than 46bit!
Fiberstore supply all kinds of fiber media converter, 10/100Base Ethernet Fiber Media Converters, 1000Base Gigabit Fiber Media Converter, SFP Fiber Media Converter, Options in singlemode dual fiber, multimode dual fiber and singlemode single fiber. We also supply Media Coverter Chassis, like 14 slot media converter chassis and 16 slot media converter chassis, used to manage the various media converters.
2012年8月23日星期四
Features and Superiority of fiber media converter
The fiber media converter typically have the following basic characteristics:
1. Ultra-low latency data transfer.
2. The network protocol is completely transparent.
3. Using a dedicated ASIC chip data wire-speed forwarding. Programmable ASIC will focus on the multiple functions onto one chip, with the advantages of simple design, high reliability, less power consumption to make equipment for higher performance and lower cost.
4. Rack-mounted equipment can provide hot-swappable, easy to maintain and without interruption to upgrade.
5 Can network management equipment to provide network diagnostics, upgrades, status reports, exception reports and control functions, can provide a complete operating log and alarm log.
6. Equipment, the use of 1 +1 power supply design, and support for ultra-wide supply voltage, power protection and automatic switching.
7. Support for extra-wide operating temperature range.
8. Support a full range of distances (0 to 120 km)
2. The network protocol is completely transparent.
3. Using a dedicated ASIC chip data wire-speed forwarding. Programmable ASIC will focus on the multiple functions onto one chip, with the advantages of simple design, high reliability, less power consumption to make equipment for higher performance and lower cost.
4. Rack-mounted equipment can provide hot-swappable, easy to maintain and without interruption to upgrade.
5 Can network management equipment to provide network diagnostics, upgrades, status reports, exception reports and control functions, can provide a complete operating log and alarm log.
6. Equipment, the use of 1 +1 power supply design, and support for ultra-wide supply voltage, power protection and automatic switching.
7. Support for extra-wide operating temperature range.
8. Support a full range of distances (0 to 120 km)
Superiority
Currently referred to the media converters, people often can not help but compare the fiber media converter with switches with optical ports.
The advantages of fiber media converter compare to optical port switch.
First, fiber media converter and ordinary switches on price far cheaper than the optical port switch, in particular, some light-port switch in the optical transceiver is inserted loss of one or several electrical interface, which allows operators to a large extent reduce the upfront investment.
Secondly, the light switch module mostly there is no uniform standard, the optical module damage will need to be replaced from the original commercial, the same module, so a great deal of trouble to the maintenance of late. On the interconnection between devices from different manufacturers of fiber media converter is no problem, once the damage can also use other vendors’ products to replace, maintenance is very easy.
Secondly, the light switch module mostly there is no uniform standard, the optical module damage will need to be replaced from the original commercial, the same module, so a great deal of trouble to the maintenance of late. On the interconnection between devices from different manufacturers of fiber media converter is no problem, once the damage can also use other vendors’ products to replace, maintenance is very easy.
Also, fiber media converter transmission distance is more complete than optical port switch products. Of course, the optical port switch has an advantage in many ways, such as unified management, unified power supply was no longer discussed.
2012年8月22日星期三
Fiber media converter classification
The fiber media converter products must strictly comply with 10Base-T, 100Base-TX, 100Base-FX, IEEE802.3 and IEEE802.3u and other Ethernet standards, In addition, EMC anti-electromagnetic radiation shall comply with FCC Part15.
With the development of fiber media converter, there are different Classification for fiber media converter.
Divided by the optical fiber can be divided into multi-mode fiber media converter and single mode fiber media converter.
The media convertercan transmit distance is not the same, due to the use of fiber, multimode transceiver transmission distance of 2 km to 5 km, while the single-mode media converter coverage from 20 km to 120 km. Should be noted that due to the different transmission distance, fiber media converter transmit power, receiver sensitivity and the use of wavelength will be different.
Such as the 5 km fiber-media converter transmit power is generally -20 ~-14db between the receiver sensitivity of-30db, use 1310nm wavelength; 120 km of fiber media converter transmit power and more between -5 ~ 0dB, the receiver sensitivity -38dB, the wavelength of 1550nm.
Such as the 5 km fiber-media converter transmit power is generally -20 ~-14db between the receiver sensitivity of-30db, use 1310nm wavelength; 120 km of fiber media converter transmit power and more between -5 ~ 0dB, the receiver sensitivity -38dB, the wavelength of 1550nm.
Divided by Working level / rate points can be divided into single-10M, 100M fiber media converter, 10/100M adaptive fiber media converter and 1000M fiber media converter.
Single 10M and 100M fiber media converter products at the physical layer, this layer media converterr products by bit to forward data. The forward mode with fast forwarding, transparent high latency advantages of low, suitable for the rate is fixed the link, while such devices without a consultation process before the normal communication, and therefore compatible and stability to do better.
10/100M fiber media converter to work in the data link layer, this layer of media converterto use a store-and-forward mechanism, so that forwarding mechanism received a packet should read the source MAC address, the purpose of MAC address and the data payload, and CRC Cyclic redundancy Check after the packet is forwarded out. Store and forward the benefits of a number of error frames can prevent spread in the network, taking up valuable network resources, but also can prevent packet loss due to network congestion caused by the data when the data link is saturated store-and-forward can be will not be able to the data transmitted first on the the transceiver cache, waiting for the network is idle and then forwarded. This will not only reduce the possibility of data conflict to ensure the reliability of data transmission, 10/100M fiber media converter is suitable for work on a fixed link rate.
1000M fiber media converter according to the actual need to work in the physical layer or data link layer, these two market 1000M fiber media converter.
Classification by type of management
Classification by type of management
Unmanaged Ethernet media converter: Plug and Play hardware DIP switch to set the electrical port mode
Managed Ethernet media converter: support carrier-grade network management
Managed Ethernet media converter: support carrier-grade network management
According to the number of fibers
Can be divided into single fiber and fiber media converter, and dual-fiber media converter. As the name implies, the single-fiber devices can save half of the fiber, to receive and send data in an optical fiber, the fiber tension is very applicable. These products using the WDM technology, the use of wavelength, multi-1310nm and 1550nm. With the growing number of single fiber optical transceiver use, the product is mature and stable.
Fiber media converter classification
The fiber media converter products must strictly comply with 10Base-T, 100Base-TX, 100Base-FX, IEEE802.3 and IEEE802.3u and other Ethernet standards, In addition, EMC anti-electromagnetic radiation shall comply with FCC Part15.
With the development of fiber media converter, there are different Classification for fiber media converter.
Divided by the optical fiber can be divided into multi-mode fiber media converter and single mode fiber media converter.
The media convertercan transmit distance is not the same, due to the use of fiber, multimode transceiver transmission distance of 2 km to 5 km, while the single-mode media converter coverage from 20 km to 120 km. Should be noted that due to the different transmission distance, fiber media converter transmit power, receiver sensitivity and the use of wavelength will be different.
Such as the 5 km fiber-media converter transmit power is generally -20 ~-14db between the receiver sensitivity of-30db, use 1310nm wavelength; 120 km of fiber media converter transmit power and more between -5 ~ 0dB, the receiver sensitivity -38dB, the wavelength of 1550nm.
Such as the 5 km fiber-media converter transmit power is generally -20 ~-14db between the receiver sensitivity of-30db, use 1310nm wavelength; 120 km of fiber media converter transmit power and more between -5 ~ 0dB, the receiver sensitivity -38dB, the wavelength of 1550nm.
Divided by Working level / rate points can be divided into single-10M, 100M fiber media converter, 10/100M adaptive fiber media converter and 1000M fiber media converter.
Single 10M and 100M fiber media converter products at the physical layer, this layer media converterr products by bit to forward data. The forward mode with fast forwarding, transparent high latency advantages of low, suitable for the rate is fixed the link, while such devices without a consultation process before the normal communication, and therefore compatible and stability to do better.
10/100M fiber media converter to work in the data link layer, this layer of media converterto use a store-and-forward mechanism, so that forwarding mechanism received a packet should read the source MAC address, the purpose of MAC address and the data payload, and CRC Cyclic redundancy Check after the packet is forwarded out. Store and forward the benefits of a number of error frames can prevent spread in the network, taking up valuable network resources, but also can prevent packet loss due to network congestion caused by the data when the data link is saturated store-and-forward can be will not be able to the data transmitted first on the the transceiver cache, waiting for the network is idle and then forwarded. This will not only reduce the possibility of data conflict to ensure the reliability of data transmission, 10/100M fiber media converter is suitable for work on a fixed link rate.
1000M fiber media converter according to the actual need to work in the physical layer or data link layer, these two market 1000M fiber media converter.
Classification by type of management
Classification by type of management
Unmanaged Ethernet media converter: Plug and Play hardware DIP switch to set the electrical port mode
Managed Ethernet media converter: support carrier-grade network management
Managed Ethernet media converter: support carrier-grade network management
According to the number of fibers
Can be divided into single fiber and fiber media converter, and dual-fiber media converter. As the name implies, the single-fiber devices can save half of the fiber, to receive and send data in an optical fiber, the fiber tension is very applicable. These products using the WDM technology, the use of wavelength, multi-1310nm and 1550nm. With the growing number of single fiber optical transceiver use, the product is mature and stable.
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