What are the XFP transceiver connection methods?

Before purchasing XFP transceiver, understand the XFP transceiver connection method, more convenient for users according to their own needs to set up the network to meet the needs of user transmission. XFP transceiver as a signal conversion transmission equipment, the front of the Ethernet signal, through the XFP transceiver transmitter to the Ethernet electrical signal converter for long-distance transmission of optical signals, XFP transceiver will receive the optical signal Electrical signal. The product is generally used in Ethernet networks that can not be covered and must be used to extend the transmission distance of the actual network environment, and are usually located in the broadband layer network access layer applications. Fiberland based on the customer in the process, summed up the 3-point XFP transceiver link method:
First, the ring backbone network
The backbone backbone network is constructed by using SPANNING TREE to construct the backbone of the metro area. This structure can be deformed into a mesh structure, which is suitable for the high density central area on the metropolitan area network, forming a fault-tolerant core backbone network. Ring backbone network support for IEEE.1Q and ISL network features can guarantee compatibility with most mainstream backbone networks, such as cross-switch VLAN, TRUNK and other functions. Ring backbone network for the financial, government, education and other industries set up broadband virtual private network.
Second, the chain backbone network
The chain-type backbone network can save a large number of backbone light quantity by chain connection, which is suitable for constructing high-bandwidth and low-cost backbone network at the edge of the city and the suburbs. The model can also be used for highway, oil and transmission Lines and other environments. Chain backbone network IEEE802.1Q and ISL network characteristics of the support, can guarantee compatible with the vast majority of the backbone network, for the financial, government, education and other industries set up broadband virtual private network. Chain backbone network is able to provide image, voice, data and real-time monitoring of integrated transmission of multimedia networks.
Third, the user access system
User access system using 10Mbps / 100Mbps adaptive and 10Mbps / 100Mbps automatic conversion function, you can connect any client device, no need to prepare a variety of XFP transceiver, the network can provide a smooth upgrade program. At the same time the use of half-duplex / full-duplex adaptive and half-duplex / full-duplex automatic conversion function, you can configure the user inexpensive half-duplex HUB, several times to reduce the cost of the client network, improve network operators The competitiveness of the. At the same time, the built-in switching core of the equipment improves the transmission efficiency of the access equipment, reduces the network broadcasting, controls the flow rate, and detects the transmission failure.
Users know how to buy XFP transceiver before the purchase method, according to the use of the scene to buy equipment, play a multiplier effect, but also save a lot of construction and installation time.

The role of XFP transceivers

Popular explanation:

Assuming there is an Internet cafes from the operator (such as telecommunications) where the rent 10M bandwidth, then they will pull the cable from the telecommunications room to your Internet cafes, and then connected to the XFP transceiver, the other end of the transceiver cable, respectively Access to the data room and your Internet cafes switches or routers, and you can then switch through the switch network cable to the various machines. That is a long extension of the network cable equipment, the general single-mode 20KM, 25KM, 40KM, 60KM above is generally not a lot of long-distance demand is generally not a lot. Now more popular with the more popular is 10 / 100M, 1000M also have, but the use of the occasion is not a lot. Multi-mode is now basically rarely used, and now the cost of single-mode cable and multi-mode than the expensive, and multi-mode general distance of 2 km or less. Transceiver also sub-power built-in, external, optical sub-single, double fiber, as well as centralized and single-type, in short, according to customer needs and occasions to choose. Now the product quality on the market varies greatly, very confusing.

Terminology Explanation:

The XFP transceiver is an Ethernet transmission media conversion unit that switches short-range twisted-pair electrical signals and long-distance optical signals, and is known in many places as photoelectric converters. The product is generally used in the actual network environment where the Ethernet cable can not be covered and must be used to extend the transmission distance, and is usually located in the access layer application of the optical fiber broadband metro network; while helping to connect the last mile of the fiber to the city The network and the outer network also played a huge role.

XFP transceiver perform better than standard

by http://www.fiber-mart.com

Fiber optic cable manufacturers through the attenuation and bandwidth of the two parameters to illustrate the characteristics of the product. Although these parameters are the basis of good performance, but they still can not fully reflect the performance of cable.
Because these cables are mainly used for local area networks, it is necessary to examine these cables in a LAN environment. For this purpose, the Nexans Data Communications Certification Center is testing multimode fiber from a system perspective.
In the evaluation of the use of different manufacturers (due to confidentiality agreement to fade the manufacturer’s name) to determine whether they are different in the optical transmission distance. The results presented in this paper are measured in G bits and 10 Gbit Ethernet. When the test is completed, the evaluation will also include the frame rate and the transmission distance on the multimode fiber when connecting the 1G, 2G, 4G and 10G Fiber Channel transceivers, respectively.
Test the configuration of the system
In order to accurately simulate the enterprise network, the use of commercial switches in the test. Figure 1 is a schematic diagram of a test setup using several different network configurations and the following devices: Spirent or IXIA bitstream generator, IXIA switch with 10GXENPAK interface, and switches from Cisco, Extreme, SMC and Asante.
IXIA or Spirent devices generate Ethernet frames and record the number of frames received. This can calculate the frame error rate (FER). In order to get a frame error rate of less than 10-13, at least 1012 packets should be transmitted. Each test takes a long time (about eight days for a 1G data stream and approximately one day for a 10G data stream).
The test system is configured with long and short wavelength GBIC transceivers and SFP transceivers operating at 1G. There are 10G optical modules for XENPAK and XFP. The trial used six different vendors’ commercial transceivers. In addition, the use of Berk-TekGIGAlite various grades of fiber. The schedule details the type and parameters of the fiber.
Test results and discussion
Test data show that the use of different fiber, different manufacturers of transceiver performance is very different. While all products meet or exceed the optical transmission distance specified by the industry standard, some products still have relatively good performance. For example, when using standard 700MHz · km multimode fiber (LB) and GBIC transceivers, vendors B and C transceivers can transmit 1000m, while vendor D can pass 2400m. Also, the 2000MHz · km fiber (EB) greatly improves the transmission distance of all measured transceivers.
Test results show that some transceivers and transponders performance is much higher than the provisions of the standardization organization. It also shows that even if the worst-case transceiver is used, the transmission distance on the existing fiber also exceeds the maximum value of the standard. Extending the transmission length of multimode fiber will reduce the total cost of gigabit and 10 Gigabit LAN cabling. Short wavelength (SX) transceivers can be used for longer distances of communication, the cost of these devices is almost one-third of long wavelength devices. Such a large cost advantage leads to the current use of multichode fiber (about 85%) and short wavelength devices. According to the results of Nexans, multimode fiber in the LAN can transmit 600 meters at 10G, and so far, theoretically, the maximum transmission distance of multimode fiber is 300 meters.
Why the theoretical value and the actual value of such a big difference. The reason is as follows: IE EE standard recommended transmission distance is calculated in the worst environment, and the actual fiber bandwidth may be better than the standard minimum. In the cable being tested, the bandwidth is greater than the minimum allowed. At the same time, the use of different light sources, fiber bandwidth will be greatly changed. In general, multimode fibers are initially designed to match light-emitting diodes, thus defining full injection bandwidth (OFL). The full injection bandwidth corresponds to the way in which the light-emitting diodes stimulate multiple modes in multimode fibers. For modern light sources, such as vertical cavity surface emitting lasers (VCSEL), with OFL is not accurate. Over the past decade, two technological advances have extended the transmission distance of multimode fiber:
● Since there is a serious chromatic dispersion and can not be modulated, the light emitting diode can not work at a rate of 622Mbit / s and above, and therefore must use the laser. For traditional networks, it is important to understand the transmission characteristics of multimode fibers connected to light-emitting diodes. It is also important to understand the transmission characteristics of multimode fibers connected to lasers for the current G-bit and even 10G-bit networks. The light-emitting diode excites all modes in the fiber, while the VCSEL only provokes a limited mode. So use a different bandwidth measurement method.
● Developed new methods for measuring the fiber bandwidth connected to the laser: finite mode injection (RML) and differential mode delay (DMD). Finite-mode injection refers to the fact that it is only a part of the end face of the core by limiting the optical signal, which is similar to the connection of VCSEL and multimode fiber. However, this measurement is not accurate because the intensity distribution of each VCSEL output is inconsistent and the different modes are excited in the fiber, which makes it difficult to measure the actual bandwidth of the fiber. In order to solve this problem, a differential mode delay measurement method is proposed. It requires the evaluation of all the patterns excited in the fiber and the calculation of the effective mode bandwidth (EMB), keeping the differential mode delay at a minimum to achieve greater fiber bandwidth, so the effective mode bandwidth is a more accurate way to measure the bandwidth.
As with fiber, XFP transceivers rarely work in the worst possible environment. Many manufacturers try to provide the remaining transmitters and receivers. The test results show that all manufacturers of XFP transceiver transmission distance exceeds the minimum standard.
Although most of the current Ethernet transmission rate is 10M or 100M per second, but the change is rapid. A large number of computers with 10M / 100M / 1000M network cards are being connected to the network, even if there is little need for such applications, G-bit Ethernet to the desktop will also become a business reality from the technology. Once the terminal connection rate reaches G bits per second, it is probably only a matter of time to upgrade to 10G bits per second to avoid the backbone becoming a bottleneck. In the choice of fiber optic cable and transceiver for the error rate and transmission distance left a larger margin, you can reduce the initial cost of the initial installation and use fees, but also make full use of bandwidth and coverage of the target users.

Is the XFP transceiver not a modem?

by http://www.fiber-mart.com

XFP transceivers and light cats are all photoelectric conversion products, many people are more easily confused. In fact, both from the working principle to the appearance of the existence of a big difference, it is easy to identify, the following Xiaobian for everyone to introduce the difference between the two.
The modem has the effect of modulation and demodulation. Light cat, also known as single-port optical transceiver, is designed for a particular user environment, it uses a pair of optical fiber for single E1 or single V.35 or single 10BaseT point to point type optical transmission terminal equipment. The equipment serves as a relay transmission device for the local network, a fiber terminal transmission equipment for the base station, and a leased line device. For the multi-port optical transceiver will generally be called “Guangduan Ji”, single-port optical transceiver is generally used in the client, similar to the commonly used wide area network (circuit) network with the baseband MODEM, and have called “light MODEM”, ” Light cat “,” light modulator “. Some people often mistakenly XFP transceiver or photoelectric converter as a light cat, in fact, this is a wrong name.
XFP transceiver, is a short distance twisted pair electrical signal and long distance optical signal interchangeable Ethernet transmission media conversion unit, in many places also known as the photoelectric converter. The product is generally used in the actual network environment where the Ethernet cable can not be covered and must be used to extend the transmission distance, and is usually located in the access layer application of the broadband metro network; while helping to connect the last mile of the fiber to the metro Network and more outside the network also played a huge role.

How to Test a XFP Transceiver?

by http://www.fiber-mart.com

After installing the XFP transceiver, testing its performance is an essential step. How to test it? You may get the answer on this article.
There are four steps in testing an XFP transceiver (As shown in the following picture), which mainly includes the transmitter testing and receiver testing.
1. The input signal used to test the transmitter must be good enough. And also need to confirm the quality of electrical measurement by jitter measurement and eye diagram measurement. Eye diagram measurements are common ways to check transmitter output waveform, because eye diagram contains abundant information, can reflect the overall performance of the transmitter.
2. The optical output of the transmitter must be tested using several optical quality metrics such as eye diagram test, OMA (optical modulation amplitude), and Extinction Ratio.
Receiver Testing
To test a receiver, there are also two steps:
3. Unlike testing the transmitter, the quality of the optical signal must be poor enough when testing the receiver.
4、Finally, the electronic output signal of the receiver needs to be tested. There are three main types:
※ Eye diagram test, which ensures the “eyes” of eye diagram are open. The eye diagram test is usually achieved by BER(bit error ratio) depth
※ Jitter Test, testing different types of jitter
※ Jitter tracking and tolerance, testing the tracking of jitter in the internal clock recovery circuit
All in all, testing a optical transceiver is a complex job, but it is an indispensable step to ensure its performance. Fiberland provides all kinds of transceivers, which can be compatible with many brands, such as Cisco, HUAWEI, ZTE, Allied Telesis, HP, Brocade, DELL, Juniper. In Fiberland, each transceiver will be tested to ensure our customers to receive the products with superior quality.

What’s CWDM XFP Transceiver

by http://www.fiber-mart.com

CWDM-XFP 10G-40 Transceiver

CWDM XFP Transceiver

10G CWDM XFP is designed for single mode fiber and operates at a nominal wavelength of CWDM wavelength. There are four center wavelengths available from 1270nm to 1330nm, with each step 20nm.

Key Features

    • The 10GB CWDM XFP 1270nm to 1330nm 40km optical transceiver
    • Average Output Power:-1.8~4.0dBm
    • Receiver Sensitivity:-15.8dBm
    • High Quality with ISO9001, TUV, CE, FCC, UL and RoHS certificates
    • Condition: Factory New
    • Supports 9.95Gb/s to 11.1Gb/s bit rates
    • Hot-Pluggable XFP footprint
    • Operating Case Temperature Standard: 0°C~+70°C
    • Duplex LC connector
    • Temperature-Stabilized CWDM Rated EML Transmitte
    • Build-in digital diagnostic functions



  • 10GBASE-LR/LW 10G Ethernet
  • 1200-SM-LL-L 10G Fiber Channel
  • 10GE over G.709 at 11.09Gbp
  • Other Optical Link
  • Packaging

      • Antistatic bag
      • Packed on pallets in a box(Default Customer Options)
      • Specific Labels as Request
      • Seperate white Box for each transceiver

    OEM and ODM

    Combining our extensive design and engineering capability in optical transceiver industry, with our competitive advantages from integrated manufacturing capability, internal supply chain, and cost competitive and scalable operation infrastructure, Fiber-Mart provides OEM, ODM, and contract manufacturing service to world leading customers with our manufacturing facilities in China.We are also mainly engaged in providing complete sets of optoelectronic device solutions to gain more brand extensions and influence for Fiber-Mart in the world.

    • OEM/ODM order is available
    • We can supply CWDM-XFP10G-40 according to your requirements, and design CWDM-XFP10G-40 label and packaging for your company. We welcome any inquiry for customized CWDM XFP optical transceiver.

    Order Procedure

    Please contact us with any special requirements you may have, we can help you create a custom solution to meet almost any application. Our engineer will review the project and provide a quotation within 1-2 business days.
    a. Email (sales@fiber-mart.com) us a rough sketch to a detailed drawing.
    b. Our engineer will review the project and provide a quotation within 24 hours.
    c. We can arrange production as low as 1 piece and as high as 1,000 pieces in 1~4 business days once an order is placed.


    International Express: Fedex, DHL, UPS, TNT and EMS.If you have another preferred carrier, please notify us in advance.
    FedEx Overnight: It will take 1-3 business days (weekends and holidays excepted) for delivery.
    DHL: It will take 2-4 business days (weekends and holidays excepted) for delivery. For Spain, Italy, Brazil and some other countries, items will take longer time to arrive due to customs clearance period.

    Save Cost By Buying CWDM XFP From Original Manufacturer Fiber-Mart Directly.

    Fiber-Mart is an professional manufacturer & supplier of CWDM XFP transceivers. All of our CWDM XFP transceivers are tested in-house prior to shipping to guarantee that they will arrive in perfect physical and working condition. We guarantee CWDM XFP transceivers to work in your system and all of our CWDM XFP transceivers come with a lifetime advance replacement warranty. If you have questions about CWDM XFP optics, please feel free to contact us at sales@fiber-mart.com.

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