2013年3月31日星期日

Small Form-factor Pluggable Modules

Small form-factor pluggable is the full name of SFP, a prevailing type of fiber optic transceivers in the market. The transceiver can be simply regarded as the upgraded version of the GBIC module. SFP module is the half size of GBIC, but the numbers of ports configured on the same panels are double. Because the small-factor pluggable transceiver is the same function with GBIC, SFP transceivers is also called as mini-GBIC.
By placing the CDR and electrical dispersion compensation outside the modules, SFP transceiver modules greatly compressed the size and power consumptions.
Google currently are purchasing a large amount of SFP + modules to design and produce its own Gigabit Ethernet switches to meet the needs of the data center database system.
SFP Standard
SFP transceiver is regulated by a competition the Multilateral Agreement (MSA) between the manufacturers. The SFP is designed according to GBIC interface, allowing ratio the GBIC greater port density (the motherboard edge of the number of transceivers per inch), the SFP is also known as "mini-GBICs”. Compared with this small package transceivers (SFF transceiver), which is smaller than the SFP, but the SFF is soldered to the motherboard as a pin through-hole device, but not plugged into the edge.
SFP Type
SFP transceivers have a variety of different transmission and receiving type, the user can select the appropriate transceiver for each link, to provide the optical performance can be achieved based on the available fiber type (such as a multimode fiber or single mode fiber). Optical SFP modules available are generally divided into the following categories:
10 km distance of the wavelength of 850 nm / 550 meters distance MMF (SX)
1310 nm wavelength SMF (LX)
1550 nm wavelength / 40 km distance XD
80 miles from ZX
120 km distance from the EX or EZX
DWDM
SFP transceiver also have copper interface, making the host device designed primarily for fiber optic communication can communicate through the UTP network cable. There are also WDM (CWDM) and single fiber bi-directional "(1310/1490 nm wavelength uplink / downlink), SFP. Commercial SFP transceivers can provide a rate of 4.25 G bps. Several packages of 10 Gbps transceivers are XFP, SFP+, the updated version of SFP.

2013年3月26日星期二

CWDM Solutions Provided by Ingellen

CWDM technology involves the applications of CWDM products such as CWDM MUX/DEMUX, CWDM SFP, CWDM add-drop multiplexer and other related products. This article is about what is CWDM stand for, the advantages of CWDM and what devices or products needed for the CWDM solutions.
As we know, broadband has unveiled a new world for subscribers, full of advanced capabilities and faster speeds. Fiber optic connections typically require two strands of fiber - one for transmitting and one for receiving signals. But, what happens when you need to add services or customers, there are three options, 1) installing more cables, 2) increasing system bitrate to multiplex more signals or 3) wavelength division multiplexing. Obviously, the first two selections are all need more investment on the existing systems, which are all not the cost-effective ones. Only the third alternative, WDM (wavelength division multiplexing), allows using current electronics and current fibers and simply shares fibers by transmitting different channels at different color (wavelengths) of the light.
There is Coarse Wavelength Division Multiplexing and Dense Wavelength Division Multiplexing for WDM technology, Coarse Wave Division Multiplexing (CWDM) technology is the most effective solution for expanding bandwidth and has many advantages over DWDM technology in terms of system costs, set-up, maintenance, and scalability.
Coarse wavelength division multiplexing are realized by the used of CWDM modules, which combines or split up to 18 optical signals over one single fiber optic link. Each signal carried can be at a different rate and in a different format. CWDM technology uses an ITU standard 20nm spacing between the wavelengths, from 1310nm to 1610nm. CWDM is coarse wavelength multiplexing technology for city and access networks.
CWDM Modules utilize thin-film coating and micro optics package technology which is available in two main configurations: CWDM Mux/Demux modules and CWDM OADM modules. The CWDM solution we offer has the ability to multiplex up to9 (8+1) different fiber links over the same physical circuit. The operation range can reach up to120Km, depending on optical modules used.The total maximum capacity is 1.25G x 9 =11.25G.

Benefits of CWDM
Passive equipment that uses no electrical power
Much lower cost per channel than DWDM
Scalability to grow the fiber capacity as needed
With little or no increased cost
Protocol transparent
CWDM can provide connectivity for multiple Wireless Carriers using virtually any protocol to the cell tower over a single strand of fiber.
Ingellen provides CWDM module with various kinds of connectors and cable length and optional stainless tube package or standard box package and to meet your requirement. We offer 2 channel CWDM Mux/Demux, 4 channel CWDM Mux/Demux …up to 18 channel CWDM Mux/Demux modules and 1-16 channels CWDM OADM. Our CWDM modules are configured by number of channels for any customer-specify channel plan, and can be integrated with taps and detectors for a complete CWDM solution. All of these CWDM modules come with compact size, Low Insertion Loss, Bi-directional and Environmentally Independent features.

2013年3月25日星期一

Cisco Transceiver Types Offered by Ingellen

This article is mainly written to introduce types of Cisco transceivers or Cisco compatible transceivers in the market, at the beginning, let confirm everyone know what Cisco stands for.
Cisco System, Inc. or Cisco, is the world leader in fiber optic networking that transforms how people connect, communicate and collaborate. Established in 1984, it has become the major provider of Internet solutions, his equipment and software products are widely used for the computer network systems connections.
Cisco transceivers is one of the popular products in the fiber optic transmission process, so does the Cisco compatible transceiver modules because transceivers need to fully compatible with the related router or switches to work formally if they are all belongs to Cisco brand. This article will introduce you type of Cisco transceivers.
Cisco transceivers are classified by the package forms, from the earliest, there are 1x9, SFF, GBIC, SFP, X2, XENPAK, SFP+, XFP Currently, the most popular types in the applications is the later six, which are Cisco SFP, Cisco GBIC, 10G Cisco transceivers SFP+, XENPAK, XFP, and X2.
Cisco GBIC is a hot-swappable input/output device that plugs into a Gigabit Ethernet port or slot, connecting the port with the network. It adopt SC connector type, which is a progress versus the previous 1x9 and SFF.
Cisco Xenpak is with SC connector, and is one of the early developed 10Gbps fiber optic transceivers developed by Cisco, based on the Xenpak Multi-source Agreement (MSA) which was instigated by Agilent Technologies and Agere Systems.
Cisco X2 is a hot swappable products designed for 10Gbps applications. It supports a wide range of 10Gbps standards, include the 10Gbps Ethernet, OC192/STM-6 SONET/SDH, OC192 VSR and 10G Fibre Channel.
Cisco SFP+, also called Cisco SFP plus, is another 10Gigabit Ethernet transceivers, used to link the equipment to the fiber optic networks. Cisco SFP+ is currently the smallest size 10G transceivers, with much lighter weight and lower power consumptions compared with the formaer 10G X2, and Xenpak. Typical Cisco SFP+ modules includes SFP-10G-SR, SFP-10G-LR, etc.
Cisco XFP are hot swappable I/O devices to plugs in the ports or slots on the 10G ports and link these ports to optical fiber networks. It is also used for 10Gigabit Ethernet and related 10G applications. XFP MSA is a multi source agreement by various manufacturers in this industry. Typical Cisco XFP are XFP-10G-MM-SR, XFP-10GB-SR, XFP-10GB-LR, etc.
The last is Let’s see Cisco SFP transceiver, or say Cisco Gigabit Ethernet SFP, the upgraded version of GBIC transceiver, are Small Form-Factor Pluggable for Gigabit Ethernet, Fibre Channel, and several other communications. Typical Cisco optical transceiver modules are like GLC-SX-MM, the Cisco 1000Base-SX Gigabit Ethernet SFP, while for copper SFP is GLC-T, Cisco GLC-T SFP, it also can be called Cisco 1000base-T SFP, which works with Category 5 wiring for max 100 meters span, which is compliant to 1000Base-T standards for Gigabit Ethernet.
Ingellen is a leading manufacturer or supplier of Cisco GLC-T and other Cisco SFP or more Cisco compatible transceivers. We have large quality of Cisco compatible transceivers in stock and can ship them to you within 245 hours. All of our Cisco transceivers are tested strictly before shipment. And they will arrive in perfect physical and working condition at your hands. You can buy from us with the cheapest price and a lifetime warranty.

2013年3月24日星期日

The Optical Splitters for FTTX Applications

A fiber splitter is a very important passive component that used in the optical network system to achieve the optical signals' coupling, branching, and distributing, just the same with the coacial cable transmission system does. An optical splitter is fiber optical tandem device with multiple import or output terminals. Generally we often use M x N to indicate a splitter with M import and N output numbers. The optical splitters that used in the CATV system, are generally 1 x 2, 1 x 3 or the 1 x N fiber splitters that composed by them.

Fiber optic splitter is the passive components for FTTH PON (passive optical network). Gigabit Ethernet Passive Optical Network (GPON) splitters play an important role in Fiber to the Home (FTTH) networks by allowing a single PON network interface to be shared among many subscribers. Networks implementing BPON, GPON, EPON, 10G EPON, and 10G GPON technologies all use these simple optical splitters.

Every passive optical network, no matter GPON, EPON systems are comprised by the Optical Line Termination (OLT), the Optical Network Unit (ONU) and Optical Distribution Network (ODN). The ODN is the most important component is the FTTx systems which is the physical channel of the optical transmission between the OLT and ONU. It is composed by fiber optic cables, optical connectors, and most importantly, the fiber splitters as well as ancillary equipment connecting these devices.

There are two basic splitter technologies for the passive optical network: Fused Biconical Taper (FBT) and Planar Lightwave Circuit (PLC), which correspond with to types of fiber splitters, FBT splitter, also know as FBT coupler, and PLC splitter. Fused Biconical Taper is the older technology and generally introduces more loss than the newer PLC splitters.
The PLC Splitter contains no electronics and use no power. Both PLC and FBT splitters are used in PON networks. A PON network may be designed with a single optical splitter, or it can have two or more splitters cascaded together. Since each optical connection will add the optical attenuation, a single splitter is superior to multiple cascaded splitters. One net additional coupling (and source of attenuation) is introduced in connecting two splitters together.

With the accessing network construction boom and the increasing subscribers trend in the market. PLC splitter will no double to become the main force in the market, the PLC optical splitters has the features of digitization, networking, broadband, miniaturization and easy maintenance, etc.

2013年3月21日星期四

10G SFP+ Transceivers Introduction

10G SFP+ transceiver is one of Gigabit Ethernet fiber optic transceiver modules which are closely related with XFP, X2, Xenpak optical modules. SFP+ transceivers are mainly applied for Gigabit optical networking formation, with transmission rate of 300m, 10km, 40km, 80km. The connection type of SFP+ modules are dual-port LC.
SFP+ optical transceiver module is a new generation of Gigabit optical transceiver, it comply with the ANSI T11 protocol to meet the 8.5G fiber channel and Ethernet 10G applications. Compared with the earlier XFP optical transceiver, its appearance size has reduced about 30%, just is the same sized of the ordinary 1-4G SFP optical modules. SFP+ transceivers only retain the basic elecro-optic photoelectric conversion function, which has reduced the design of the original XFP SerDes, CDR, EDC, MAC, conversion function, thus simplifying the design of 1 0G optical transceiver module, as well as the power consumption. SFP plus optical transceiver has the obvious advantages such as higher-density, lower power consumption and lower system construction cost and other significant features. The 10G SFP+ transceivers are widely used in Gigabit Ethernet fiber-optic data communications, and it has becomes the mainstream among the Gigabit modules.
SFP+ VS X2, XFP, Xenpak
They are all belong to 10Gigabit optical transceivers. SFP+ are more compact than X2 and XFP. Besides, SFP+ has a strong compatibility which can be interconnect and work together with other 10G XFP, X2, Xenpak optic transceivers. As to the price, the SFP+ has more advantages than other 10G transceivers.
SFP+ is similar with the SFP from the appearance, and they are all with LC connectors, but they are also different from each other: The transmission rata of them are different, SFP+ is 10Gbp/s optical modules, while SFP is generally 1.25G, 155M, 2.5G and other rate.
SFP-10G-SR is a typical Cisco compatible SFP+ transceivers which is hot swappable fiber transceiver module with 850nm VCSEL transmitter and PIN photo detector, The SFP-10G-SR fiber optic
transceiver features low power consumption and it support multi-rate from 2G fiber channel to 10G Ethernet. Ingellen Technology Co., Ltd is a professional fiber optic transceiver OEM manufacture that provides the full range of 10G SFP+ transceivers and many compatible 10G transceivers for the market major brands including Cisco, HP, Finisar. The Cisco SFP-10G-SR modules are right one of the hot Cisco SFP+ transceivers that we recommend.

2013年3月20日星期三

The DDM Function of Fiber Optic Modules

When using SFP transceiver modules, you will often need to know it is with DDM (digital diagnostics monitoring) functions or not, many peoples don’t know well about this term, this article will introduce three roles that DDM plays. DDM gives the end user the ability to monitor real-time parameters of the SFP, such as optical output power, optical input power, temperature, laser bias current, and transceiver supply voltage.
Optical module life prediction
DDM allows network managers to find potential link failures before system performance is affected. Failure notice, the system administrator can switch the business to a backup link or replace the suspicious device, so as to repair the system in the case of uninterrupted business.
Through real-time monitoring of the internal operating voltage and temperature of the transceiver module allows the system administrator to find some potential problems:
Vcc voltage is too high, will bring about the breakdown of CMOS devices; Vcc voltage is too low, the laser does not work properly.
Received power is too high, damage to the receiving module.
Operating temperature is too high, will accelerate the aging of the device.
In addition, the monitoring of the received optical power, can monitor the performance of the lines and the remote transmitter.
Fault Locator
In optical link, locating the fault occurred fast loading of business is essential. ault isolation characteristics allows system administrators to quickly locate the position of a link failure. This feature can locate the fault in module on the line; locally module or modules in the remote. Quickly locate the fault, reducing the time to repair the system.
Compatibility verification
Another function of DDM is to verify the modules compatibility. Compatibility verification is the analysis of the modules work environment to meet the data sheet or compatibility and related standards. The performance of the module only in this compatibility work environment can be guaranteed. In some cases, due to environmental parameters beyond the data sheet or standard, will cause the module performance degradation, thereby result in the transmission error.
Environment like below is not compatible with the modules:
Voltage exceed the specified range
The received optical power is overload or lower than the receiver sensitivity.
Temperature is beyond the standard operating temperature range.
Ingellen Technology, as one of major fiber optic transceiver OEM manufacturers in China, provides a full range of SFP transceivers with or without DDM functions. Besides, you can also wholesale Cisco transceivers which are with 100% compatibilities to all you Cisco equipments. We provide high quality compatible transceivers for Cisco, HP, 3Com, Juniper, Foundry, etc.

What is Fiber Terminal Box?

Fiber optic termination box refers to a box shape for fiber optic cable management solutions. They are used to fixed the optical cable terminals, cable and pigtail fusion and splicing, and protect or distributer the optical fiber links in FTTH networks. Fiber terminal box is similar with cross connect cabinet, but the role is different. Cross connect cabinet is to connect tow fiber cables, while the terminal box is used to connect the fiber cable terminal with the pigtails with a protective effect. Usually the fiber optic boxes include the optical distribution frame and fiber optic terminal box. In general, fiber terminal box is for a few closed cores, and the open type is called ODF (optical distribution frame). Fiber termination boxes can be with 12 cores or 24 cores.
Cross connect cabinet and Fiber terminal box comparation
Fiber optic termination box is used to connect the two sections of fiber optic cable. The termination box is the access to the place of the ends of the cable, and then connect to the optical switches via the fiber patch cables. Therefore, the terminal box is usually installed on a 19-inch rack, and can accommodate a number of cable ends. In practical work, roles of cross connect cabinet and fiber termination boxes are different, cross connect cabinets are divided into fiber cable cross connect cabinet and copper cross connect cabinet, which are used when front cable premising, while fiber termination boxes are used for protecting the cable terminal from external damages. Optical distribution frame can also be divided into fiber optic patch panels and copper patch panels, they are the same role with cross connect cabinet, but they are used indoor of carriers'data center.
Fiber optic cable terminal box is generally suitable for indoor or none open-air outdoor use. Applications of fiber termination boxes is universal, they are widely used in telephone, agricultural telephone network system, data and image transmission system, CATV cable television series, indoor cable through force access and branch connection, played the role of the pigtail disk storage and protection of joint. Ingellen, among some Chinese most popular fiber termination box manufacturers, provides a full range of typical fiber terminal box (FTB) with 12 ports or 24 ports. The fiber optic boxes are made of cold rolling steel and the surface of the box use the technique of dim blowing plastic. This type fiber optic box is typically installed with FC, SC, ST or LC adapters on the patch panel. This fiber terminal box could be installed on the wall or put in horizontal line.