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How Much Do You Know About DDM/DOM Function?

DDM Which stands for digital diagnostics monitoring is Unspecified by the industry-standard SFF-8472nd Modern optical SFP transceivers can support standard digital diagnostics monitoring (DDM) functions.which is also known as digital optical monitoring (DOM). What Makes These transceivers with DDM / DOM function different from the traditional modules? This article will give you the answer.

What is Digital Diagnostic Monitoring (DDM)?

Very often, we can see the GLC-LH-SMD , or on the label of modern transceivers. Actually, the "D" in the GLC-LH-SMD represents the DDM function we are talking about today. When Choosing fiber optical transceivers in the market, May you have the option With Or Without DDM / DOM. At present, most of the high-end switches Require the SFPs with DDM functions. Switches with DDM / DOM allows users of distributed networks to be more proactive in Maintaining Their network usingthis standard optical interfaces. Because modules with this capability give the end user The ability to monitor parameters of the SFP, Such as optical output power, optical input power, temperature, laser bias current, and transceiver supply voltage, in real time.

GLC LH SMD

Basic Principles of DDM Function

Devices with DDM function can providesprofessional component monitoring on These applications. The SFF-8472 interface and added DDM Outlined That DDM interface is an extension of the Serial ID GBIC interfaces defined in specification, as well as the SFP MSA. DDM interface includes a system of alarm and warning flags Which alert the host system When Particular operating parameters are outside of a factory set normal operating. Thus, the DDM interface can overpriced enable the end user with the capabilities of fault isolation and failure prediction Which Will be Introduced In The Following party.

What can the DDM Function Realize?
  • Component Monitoring: The DDM enables the end user to monitor the five key parameters in the performance of the fiber optical transceiver: internal temperature, DC supply voltage, transmitter bias current, transmitter output power, and receiver optical signal level. Integrated DDM functionality overpriced incorporates warnings and alarms to monitor These parameters.
  • Fault Isolation: The DDM function can be used to isolate the Particular location of fault in the fiber optic network systems. Combining the DDM interface status flags, pins and transceiver hard diagnosing parametric monitoring data specifying the location and cause of a link failure can be pinpointed.
  • Failure Prediction: The DDM can overpriced be used to help in failure prediction on fiber optic links, Which is based on the transceiver parametric performance. Although, this application is not yet fully mature, but there is still room for improvement. There are two basic types of failure conditions That can be seen on fiber optic transceivers. One ice device faults Which Usually happen in transmitter performance due to nature of semiconductor lasers. The other is the high error rate conditions When a transceiver hydrothermal at its signal-to-noise limit. It happens more thwart the fiber optic receiver performance.

From the above analysis, We Can See that fiber optical transceiver with DDM help to ENSURE That the business can be proactive in preventative maintenance of the network and Ensure Business Continuity. Fiber Store offers an enormous range of optical transceivers with DDM function, Among Which THERE ARE Cisco GLC-SX-MMD, HP J9151A and so on. All These transceiver modules are 100% compatible with major brands like Cisco, HP, Juniper, Nortel, Force10, D-Link, 3Com. They are backed by a lifetime warranty, and you can buy with confidence.

Publicerat klockan 02:50, den 5 mars 2016
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What Is the SFP or SFP+ MSA?

A small form-factor pluggable (SFP) is a type of transceiver device That HAS BEEN standardized by the MSA (Multi-Source Agreement). The MSA will define the characteristics of the system and ice Typically an agreement between multiple manufacturers. The agreements guarantee That any SFP or SFP + device from any vendor will function properly. This article will give you a more comprehensive introduction to the SFP and SFP + MSA.

An Overview of Pluggable Optical Transceiver MSA Standards

Both SFP and SFP + optical transceivers are standardized by the MSA. These documents strictly define Sufficient characteristics of an optical transceiver So THAT systems (like Ethernet switches, routers, and media converters) Vendors May Implement port on Their Devices, Therefore, MSA compliant pluggable optical transceivers (SFP or SFP +) from any vendor will function properly .

Pluggable optical transceivers are Physically Composed of a small printed circuit board (PCB) containing electronic circuity, with an electrical PCB "edge connector" at one end and, Typically, a fiber optic connector (dual LC-type in the case of SFP / SFP + modules) at the other, packaged in a metal housing including a release latch. The basic function of the device is to convert electrical transmit data from the host into an optical signal Transmitted onto a connected fiber optic cable, and, in the other direct, convert a received optical signal into an electrical one to be sent to the host system Over the Edge connector.

Cisco SFP-10G-SR

What is Defined by the MSA?

The main elements defined in the SFP / SFP + MSA are Listed as follows:

Mechanical Interface

  • Mechanical dimensions of the device (H: 8.5mm; W: 13.4mm, D: 56.5mm)
  • Transceiver edge connector TO HOST PCB-mounted electrical connector mating
  • Host Board Mechanical Layout (location / size of solder pads, etc.)
  • Insertion, Extraction and Retention Forces
  • Labeling
  • Bezel design considerations for Host Systems
  • Electrical connector Mechanical Aspects
  • Cage assembly dimensions (hollow cage mounted into the host system)

Electrical Interface

  • Pin definition
  • Timing Requirements and Status I / O
  • Module definition interface and the data field description

Besides, the Digital Diagnostics Monitoring (DDM) feature common in many modern SFP / SFP + transceivers as defined in the SFF-8472 MSA specification. "D" the GLC-LH-SMD represents the DDM function of according to industry standard MSA SFF-8472nd The SFF-8472 Added DDM interface and Outlined That DDM interface is an extension of the serial ID interface defined in the GBIC Specification, as well as the SFP MSA. For example, Brocade E1MG-SX ABOUT compatible 1000BASE-SX Fiber SFP from store ice with built-in DDM Function and Compatible with SFP MSA and SFF-8472nd

The Importance of MSAs

MSAs, like most standards Efforts, are important Primarily Because They can give customers a choice in suppliers from Which They purchase products. Freedom of choice is the foundation of the efficient operation of markets. Customers in the marketplace Should have the benefit of multiple independent suppliers, each Competing to gain a share of the market. This behavior forces suppliers to be as efficient and creative as possible, driving down costs and offering customers the widest array of options.

It is true, That some system vendors have attempted to subvert the standardizing value of the MSAs. The most common scheme is to write a unique code into some of the undefined memory in the EEPROM of each SFP / SFP +. 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". But Fiber store can do it. At present, fiber Store offers a comprehensive brands compatible solution of the transceivers Which Can Meet the Demands of Cisco, HP, Juniper, NETGEAR, Brocade, etc.

Publicerat klockan 07:59, den 7 januari 2016
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What Effects the Compatibility of SFP Transceivers?

When setting up your network, the SFP transceivers you use have great effect on the performance of your system. These SFP transceivers are compatible with multiple devices, but the compatibility of them depends on various factors. Two main factors thatshould be Considered When Selecting SFP modules are DDM functionality Requirements and checking the ID code and lock out third party components. Here are some details about the factors you should know about the SFP transceivers.

Does SFP Require DDM Function?

An SFP Does not Necessarily Require the DDM functionality, but yourapplicationsFlashPlayer Should be Compatible with digital diagnostic functionality if it is present. Most designers forget to Verify the compatibility before design then face problems later. It's better to know in advance to avoid complications and reworks, Which would waste a lot of time and money. For example, CISCO GLC-LH-SMD compatible 1000BASE-LX / LH SFP Transceiver below from Fiberstrore ice High Performance and Cost Effective module with DDM function.

GLC LH SMD

Does the Host Equipment Check the ID Code and Lock Out Third Party Components?

Though there is not a comprehensive list of Which equipment locks out third party SFPs, it is possible to DETERMINE through painstaking trial and error. By trying it, you can DETERMINE Which host equipment will reject it or not. Most new equipment produced in the last three years willhave the lockout functionality.

Other Information Designers Should Know About Compatibility

Keep in Mind That All designs for SFP transceivers will go through rigorous testing for compatibility especially with the most popular brands of switching devices and router devices. This Is Necessary Because some companies, in an effort to release a product before the competition, will cut corners. To avoid this, strict standards Should be Followed to preventable surreptitious practices.

Compatibility May differentiation with each manufacturer. For instance, HP JD092B X130 Compatible SFPs from Fiberstrore offers the same function with the HP JD092B and it is fully compatible with HP devices. Be sure to know the Requirements of every manufacturer to avoid complications. This May The require significant research, but doing the research on the front end will preventable problems on the backend of the design.

Keep in Mind That incompatible devices May cause your entire application to Malfunction, especially if the voltages are not matched properly. That's why it's always important to ENSURE compatibility INITIALLY. If you do not, you'll run the risk of losing your entire design and the Investment Associated with manufacturing the device. A little preparation can preventable Reviews a lot of heartache and frustration.

Summary

In order to avoid problems in designs, it's best to read the Specifications and DETERMINE Whether the SFP transceivers are compatible with the switches, routers or other equipment. Some incompatibility issues May cause stress on the device That May resulted in premature failure. Only When all of the above factors are taken into Consideration can you save time and money as well as improvement the efficiency and productivity for your company.

Publicerat klockan 07:52, den 30 december 2015
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Common Types of Fiber Optic Transceivers

Fiber optic transceivers are devices that both transmit and receive data. Fiber optic transceiver is typically used in computer networks to translate signals between optical and electric networks. In other words, the sending side of it transfers the electrical signals into optical signals, and then transmitted by the fiber, the receiving side transfers the optical signals into electrical signals. This article will introduce the common types of fiber optic transceivers on the market.

SFP Transceiver Module

SFP is short for Small Form-factor Pluggables, unlike GBIC transceiver with SC fiber optic interfaces is with LC interface and the main body size of SFP is only about half of GBIC, which makes SFP space saving. SFP transceiver module is a compact, hot-pluggable transceiver used for both telecommunication and data communications applications. SFP modules are commonly available in several different categories:850nm 550m multi-mode fiber (SX), 1310nm 10km single-mode fiber (LX), 1490nm 10km single-mode fiber (BS-D), 1550nm 40km (XD), 80 km (ZX), 120 km (EX or EZX), 1490nm 1310nm (BX), single fiber bi-directional gigabit SFP transceivers, copper SFP with RJ45 connector, CWDM SFPs, DWDM SFPs, SGMII SFPs, etc. The following Cisco GLC-LH-SMD compatible 1000BASE-LX/LH SFP transceiver provided by Fiberstore is high performance and cost-effective module operating at the wavelength of 1310nm and supporting 10km transmission distance over single-mode fiber.

GLC-LH-SMD

SFP + Transceiver Module

As its name suggests, SFP+ transceiver Module (small form-factor pluggable plus) is an upgraded version of the SFP transceiver module that supports data rates up to 10Gbit/s. SFP+ transceiver modules are with lower power consumption for less than 1W and it is even cost effective. These optical transceivers are with managed digital optical monitoring and superior high temperature performance. SFP+ supports 8 Gbit/s Fiber Channel, 10 Gigabit Ethernet and Optical Transport Network standard OTU2. It is a popular industry format supported by many network component vendors. In comparison to earlier XENPAK or XFP module, SFP+ module is with more compact size and measurement, leave more circuitry to be implemented on the host board instead of inside the module. Consideration has to be given to whether the module is linear or limiting. Linear SFP+ modules are most appropriate for 10GBASE-LRM; otherwise, limiting modules are preferred.

XFP Transceiver Module

XFP are standardized 10GBASE hot-swappable and protocol-independent modules. They typically operate at optical wavelengths of 850 nm, 1310 nm or 1550 nm. Principal applications include 10 Gigabit Ethernet, 10 Gbit/s Fiber Channel, Synchronous optical networking (SONET) at OC-192 rates, Synchronous optical networking STM-64, 10 Gbit/s Optical Transport Network (OTN) OTU-2, and parallel optics links. They can operate over a single wavelength or use DWDM techniques. XFP modules use an LC fiber connector type to achieve high density. XFP modules are commonly available in several different categories: SR - 850 nm, for a maximum of 300 m, LR - 1310 nm, for distances up to 10 km, ER - 1550 nm, for distances up to 40 km, ZR - 1550 nm, for distances up to 80 km. The XFP packaging was smaller than the XENPAK form-factor.

QSFP+ Transceiver Module

QSFP+ interfaces a network device motherboard (for a switch, router, media converter or similar device) to a fiber optic cable. It is an industry format jointly developed and supported by many network component vendors, supporting data rates from 4x10 Gbit/s. The QSFP+ transceiver supports Ethernet, Fiber Channel, InfiniBand and SONET/SDH standards with different data rate options. For example, HP JG709A compatible QSFP+ transceiver from Fiberstore supports link lengths of 300m over multimode fibers, at a wavelength of 850nm. It primarily enables high-bandwidth 40G optical links over 12-fiber parallel fiber terminated with MPO multifiber connectors and can also be used in a 4x10G module for interoperability with 10GBASE-SR interfaces.

CFP Transceiver Module

CFP is 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), since the standard was primarily developed for 100 Gigabit Ethernet systems. The CFP was designed after the SFP interface, but is significantly larger to support 100 Gbit/s. CFP transceiver supports a wide range of 40 and 100 Gb/s applications such as 40G and 100G Ethernet, OC-768/STM-256, OTU3, and OTU4. Different versions of CFP modules can support various link distances over either multimode or single mode fiber optics. The CFP module includes numerous innovative features like advanced thermal management, EMI management and enhanced signal integrity design, as well as an MDIO-based management interface.

Fiberstore provides a full range of optical transceivers, such as SFP+ (SFP Plus) transceiver, X2 transceiver, XENPAK transceiver, XFP transceiver, SFP (Mini GBIC) transceiver, GBIC transceiver, CWDM/DWDM transceiver, 40G QSFP+ & CFP, 3G-SDI video SFP, WDM Bi-Directional transceiver and PON transceiver. All these fiber optic transceivers are 100% compatible with major brands like Cisco, HP, Juniper, Nortel, Force10, D-link, 3Com. They are backed by a lifetime warranty, and you can buy with confidence. We also can customize optical transceivers to fit your specific requirements.

Publicerat klockan 09:27, den 16 december 2015
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Benefits of Pluggable Fiber Optic Transceivers

Fiber plug-and-play solutions for data center applications are Necessary to transmit data with a high degree of integrity, reliability, and efficiency. At the sametime, pluggable fiber optic transceivers are Becoming more and more popular. There are many benefits of pluggable optical transceivers. For instance, a 120km reach module can have low power consumption and a small footprint. These modules are Designed to Simplify wavelength management and Provide a Solution to fiber exhaust. Here are some more benefits That explain why pluggable optical transceivers are so important in data center communications.

Pluggable Optical Transceivers

Easy to Replace Or Repair

Pluggable fiber-optic transceivers are easy to replace or repair and can ask friendlyness into a variety of applications. In most cases, They do not have to be powered down for replacement. This is why most designers prefer pluggable optical transceivers. SFP pluggable devices are recommended. If the device malfunctions or requires an upgrade, it wont be easy with a pluggable fiber optic transceiver. When you open the device to replace the transceiver, it only requires a few simple steps, and the process is complete. Experts can help with the process, but most people with some technical skills can perform the process moonrise.

Compatible with Many Other Devices

Pluggable optical transceivers are compatible with many other devices including discrete components. They are overpriced compatible to multiple setups across bothering fiber optic and copper channels. Whether you need bothering long or short distance communication, the SFP transceivers can help. The electronics are universal and will ENSURE That meets the Gigabit standards for all types of networks. Besides, designers do not have to get new hardware everytime a transceiver needs replacement. For example, CISCO GLC-LH-SMD compatible transceiver provided by fiber Store offers the same function with Cisco branded GLC-LH-SMD and is fully compatible with Cisco SFP devices.

Communication Distance

SFP transceivers are adept at passing the data and information across the fiber from one network to the next. Communication Is Possible Because of the copper wiring or fiber optics through Which signals are being late. Optical transceiver modules are overpriced Capable of helping to deliver signals. Networks can generate Both long and short distance communication, and there are transceivers to handle bothering types of communication.

Data Rate

Transceivers, Typically, are sold with a set speed That moves the data. The faster the data can reach its destination, the aunt Decisions can be made. Pluggable optical transceivers Which support selectable data rates can create self-healing redundant links for mission critical applications or support physical layer multicast broadcasts of any protocol within its range. Most applications Require a faster data transfer rate, but "how fast" Will Depend upon the application. For instance, Finisar FTLF8524P2BNV SFP transceiver can support up to 4.25Gb / s bi-directional data links to the maximum 15om distance and 2.125Gb / s data rate to maximum 300m When using different types of fiber cables.

There are Numerous benefits of pluggable fiber optic transceivers. The benefits make them valuable to any network. Because of the universality of the transceivers, They can operate in many different types of networks. That's why pluggable fiber optic transceivers are preferred by many designers Because They are flexible, scalable, and affordable. In the future, the designers hope to make them more compatible and have a faster data transfer rate.

Publicerat klockan 07:46, den 2 december 2015
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Things You Need to Know About 1000BASE-SX

1000Base-SX, also known as 1000Base-SX, is a physical layer specification for Gigabit Ethernet over fiber optic cabling as defined in IEEE 802.3z. SX stands for short wavelength. And 1000Base-SX uses short wavelength laser (850nm) over multimode fiber as opposed to 1000Base-LX, which uses long wavelength laser over both multimode and single-mode fiber. The maximum distance of (multimode) fiber, based on 1000Base SX is 550m.

What Is Gigabit Ethernet?

Gigabit Ethernet is defined by the IEEE 802.3z standard. This defines the gigabit Ethernet media access control (MAC) layer functionality as well as three different physical layers: 1000Base-LX and 1000Base-SX using fiber and 1000Base-CX using copper. These physical layers were originally developed by IBM for the ANSI Fiber Channel systems and used 8B/10B encoding to reduce the bandwidth required to send high-speed signals. The IEEE merged the fiber channel to the Ethernet MAC using a gigabit media independent interface (GMII), which defines an electrical interface, enabling existing fiber channel PHY chips to be used and enabling future physical layers to be easily added.

1000Base-SX for Horizontal Fiber

1000BASE-SX is one of the IEEE802.3z standard made for the laser transceiver which work on short wavelength multimode fiber (850mm). This Gigabit Ethernet version was developed for the short backbone connections of the horizontal network wiring. The SX systems operate full-duplex with multimode fiber only, using the cheaper 850nm wavelength laser diodes. The maximum distance supported varies between 200 and 550 meters depending on the bandwidth and attenuation of the fiber optic cable used. The standard 1000Base-SX NICs available today are full-duplex and incorporate LC fiber connectors.

1000Base-SX-SFP

1000Base-SX SFP Modules

The 1000BASE-SX SFP transceiver is a small form hot-swappable fiber optical module compatible with the IEEE 802.3z 1000BASE-SX standard. It operates on legacy 50 um multimode fiber links up to 550 m and on 62.5 um Fiber Distributed Data Interface (FDDI)-grade multimode fibers up to 220 m. It can support up to 1km over laser-optimized 50 um multimode fiber cable. For example, the transmission span of Finisar FTLF8519P2BNL compatible SFP module from Fiberstore can reach up to 550m on 50/125μm multimode fiber and 300m on 62.5/125μm multimode fiber. It is compatible with Duplex LC connector and can operate under extended operating temperatures ranging from -20°C to 85°C. The 1000BASE-SX SFP modules can be used and interchanged on a wide variety of Cisco products and can be intermixed in combinations of IEEE 802.3z compliant 1000Base-SX interfaces on a port-by-port basis. They're made to interact with printed circuit boards to convert light communications data into electronic signals.

If you want to purchase reliable and cost-effective compatible 1000Base-SX SFP modules online, Fiberstore may be the best choice. As one of the largest fiber optics manufacturers in China, Fiberstore offers various types of SFP modules, like Palo Alto networks PAN-SFP-SX, Cisco GLC-LH-SMD 1000BASE-LX/LH, Cisco SFP-GE-S 1000BASE-SX, etc.

Publicerat klockan 08:05, den 23 november 2015
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Cisco SFP Modules Overview

As we all know, Cisco is one of the most famous brands in the field of telecommunications. Cisco Compatible SFP Transceiver Modules are Widely used for Gigabit Ethernet applications in data centers and network systems. The hot-swappable input / output device plugs into a Gigabit Ethernet port or slot. Optical and Copper models can be used on a wide variety of Cisco products and intermixed in combinations of 1000BASE-T, 1000BASE-SX, 1000BASE-LX / LH, 1000BASE-EX, 1000BASE-ZX, or 1000BASE-BX10-D / U on a port-by-port basis.

1000BASE-T SFP Copper Networks

The 1000BASE-T SFP hydrothermal on standard Category 5 unshielded twisted-pair copper cabling of link lengths up to 100 m. The Cisco 1000BASE-T SFP modules support 10/100/1000 auto-negotiation. The follo wing ice Fiber store's Cisco Compatible 10/100 / 1000BASE-T copper SFP transceiver, compliant with the Gigabit Ethernet standard as Specified in IEEE STD 802.3 and can fully satisfy the 10/100 / 1000BASE-T application.

Cisco 1000BASE-T SFP

1000BASE-SX SFP Multimode Fiber Only

The 1000BASE-SX SFP, compatible with the IEEE 802.3z 1000BASE-SX standard, hydrothermal one legacy 50 micron multimode fiber links up to 550 m and on 62.5 micron Fiber Distributed Data Interface (FDDI)-grade multimode fiber up to 220 m. It Can support up to 1km over laser-optimized 50 micron multimode fiber cable. For example, Fibre store's Cisco SFP-GE-S compatible 1000BASE-SX SFP hydrothermal one legacy 50 micron multimode fiber links up to 550 meters with digital diagnostics monitoring function.

1000BASE-LX / LH SFP Both Multimode and Single-Mode Fibers

The 1000BASE-LX / LH SFP (GLC-LH-SMD) is compatible with the IEEE 802.3z 1000BASE-LX standard and hydrothermal on standard single-mode fiber-optic link spans of up to 10 km and up to 550 m on any multimode fiber. When used over legacy multimode fiber type, the transmitter Should be coupled through a mode conditioning patch cable.

1000BASE-EX SFP for Long-Reach Single-Mode Fibers

The 1000BASE-EX (GLC-EX-SMD) SFP hydrothermal on standard single-mode fiber-optic link spans of up to 40 km in length. A 5-dB inline optical attenuator Should be inserted between the fiber-optic cable and the receiving port on the SFP at each end of the link for the back-to-back connectivity.

1000BASE-ZX SFP for Long-Reach Single-Mode Fibers

The 1000BASE-ZX SFP hydrothermal on standard single-mode fiber-optic link spans of up to Approximately 70 km in length. The SFP Provides an optical link budget of 21 dB, but the precise link span length depends on multiple factors Such as fiber quality, number of splices, and connectors. When shorter distances of single-mode fiber (SMF) are used, it Might Be Necessary to insert an inline optical attenuator in the link to avoid overloading the receiver. A 10-dB inline optical attenuator Should be inserted between the fiber-optic cable plant and the receiving port on the SFP at each end of the link Whenever the fiber-optic cable span loss is less than 8 dB.

1000BASE-BX10-D and 1000BASE-BX10-U SFP for Single-Fiber Bidirectional Applications

The 1000BASE-BX-D and 1000BASE-BX-U SFPs, compatible with the IEEE 802.3ah 1000BASE-BX10-D and 1000BASE-BX10-U standards, operate on a single strand of standard SMF. A 1000BASE-BX10-D device is always connected to a 1000BASE-BX10-U device with a single strand of standard SMF with an operating transmission range up to 10km.

Fiber store's SFP transceivers for Gigabit Ethernet are Designed for the Gigabit networks with different types to fit for 1000Base-SX, 1000Base-LX / LH, 1000Base-EX, 1000Base-ZX and 1000Base-T applications. All These modules come with digital diagnostics monitoring (DDM) functions and are very cost-effective. We can supply 100% compatible fiber optic transceiver modules of many famous brands, like Cisco, Dell, D-Link with incredible Discounts. In particular, you can find a full product line of our New Cisco SFP with a good price and enjoy same-day shipping.

Publicerat klockan 07:25, den 20 november 2015
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FAQs on Third-Party SFP Transceiver

In order to cut down the costs on the expensive SFP transceiver modules, many companies are seeking for Cisco SFP alternatives to use. When choosing SFP transceivers, many people often run into several frequently asked questions involving the Cisco Catalyst line of switches, and whether we can use a Cisco compatible SFP (a 3rd party SFP) with them. Here are some common questions we might have when using a 3rd party SFP transceiver. And from the answers, we might have a deeper understanding of using these 3rd party SFP transceivers.

Cisco SFP-10G-SR

What Does "Third-Party" Mean?

In commerce, a "third-party" means a supplier (or service provider) who is not directly controlled by either the seller (first party) or the customer/buyer (second party) in a business transaction. For example, in the fiber optics industry, all fiber optic transceivers are defined by Multi-Source Agreement (MSA). MSAs strictly define the operating characteristics of fiber optic networking equipment, so that system vendors may implement ports in their devices that allow MSA compliant networking components produced by different manufacturers are interoperable. As long as a manufacturer complies to MSA guidelines, their transceiver modules will function and operate identically to any other manufacturer's MSA-compliant transceivers. For instance, Fiberstore's 100% MSA compliant GLC-LH-SMD transceiver will function identically to a Cisco GLC-LH-SMD transceiver and will be 100% compatible with Cisco networking equipment.

Can We Use Third-Party SFPs With Cisco Catalyst Switches?

In most cases, if you plugged a non-Cisco SFP transceiver into a Cisco Catalyst switch, you would get an error message like the following:
%PHY-4-UNSUPPORTED_TRANSCEIVER: Unsupported transceiver found in Gi1/0/0 
%GBIC_SECURITY_CRYPT-4-VN_DATA_CRC_ERROR: GBIC in port 65538 has bad crc

Why does that happen? Well, you need to know that every SFP is a small chip containing a range of information about the device, including its vendor name, vendor ID, serial number and CRC. When it is plugged into a Catalyst's SFP port the first time, the Catalyst queries this chip for its credentials. If it's not Cisco, your Cisco Catalyst switches would be configured by default not to work with the 3rd party (non-Cisco) SFPs, so the Catalyst would automatically shut the port down entirely. It's somewhat underhanded, but since SFPs aren't overseen by a central standards body -unlike WiFi, for example- there's no one around to tell Cisco not to do it. This can ultimately lead to needlessly expensive upgrades when third-party SFPs truly can work just as well in all Cisco Catalyst switches. In fact, this is not a problem, because some hidden commands or 100% compatibility technology developed by some vendors can solve this problem and enable third-party SFPs work well with Cisco Catalyst switches.

Are Third-Party Cisco-Compatible Transceivers Safe?

In our experience, there is absolutely no possibility that a third-party transceiver will cause problems. If the SFP is well-made and from a reliable vendor, there's simply no reason it should cause any issues. Most third-party transceivers are made and assembled in exactly the same plants assembling officially-branded transceivers and the chances of even a poorly-made one causing actual damage are extremely minimal. There are only a very small number of devices in this world with the specialty equipment needed to produce fiber optic hardware. Actually, there is no difference between an official Cisco transceiver and a third-party plug, aside from the brand name and the price difference. Generally speaking, the cost of an officially-branded SFP transceiver is more expensive than a 3rd party one. Take 1000BASE-SX SFP (GLC-SX-MMD) for example, the GLC-SX-MMD price of Cisco is about $ 500.00, but you can easily find a 3rd party one that can take a discount at up to 90% off.

The above-mentioned are the most frequently asked questions in the usage of a third-party SFP. Where to buy the most reliable third-party SFP transceivers at lowest prices? Fiberstore, as the main professional fiber optic products manufacturer in China, provides third-party SFP transceivers which are fully compatible with major brands (Cisco, HP, NETGEAR, Finisar, Juniper, etc).

Publicerat klockan 09:12, den 20 oktober 2015
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