OEMfibers.COM gives a full selection of other brands compatible transceivers, such as for example Cisco, HP, Juniper, Dell, Extreme, Force10, 3Com, Alcatel-Lucent, Allied Telesis and so forth. I'd like to introduce you the set of HP SFP transceiver on OEMfibers website
HP transceiver modules, including HP SFPs, HP XENPAKs, HP XFPs, and HP X2s. HP transceiver modules are hot-swappable devices, which combine the features of a transmitter and receiver right into a single module. The hot-swappable component enables you to change between transceiver modules, without turning off the energy to your device; for instance you could change to a HP transceiver module with a different optical wavelength, or in one which supports copper wire to support for optical dietary fiber if needed. All of the HP transceivers are guaranteed compatible for all HP switch and router products
HP transceiver modules can be found which support data rates from 100Base (100 Mbit/s), up to the 10G Base (10 Gigabit/s). Transceiver modules are also designed for various kinds of cabling such as cat 5 copper, and various grades of optical fibers so please make sure that you are purchasing the right kind of transceiver for network
You have a sizable collection of HP SFP transceivers , including J4858A, J4859A , J4860A, J4858B , J4859B, J4860B, J8177C, J4858C, J4859C, J4860C, J9142B, J9143B, A6515A, J8177B, J9100B, J9099B, JD118B. These HP SFP modules are with different working wavelength and appropriate for different SFP modules
The HP compliant J4859A is a 1000BASE-LX SFP 1310nm 10km transceiver module, offers a low priced high-performance connection. The HP SFP J4859A can be a Class 1 laser transceiver product. The transceiver module is certainly fully complies with the multi-sourcing agreement (MSA) that allows it to work in every MSA compatible platforms
HP SFP Transceiver J4859A Features & Specifications
HP J4858B Compatible 1000BASE-SX SFP Transceiver Module
Data Rate: 1Gbps
Wavelength: 850nm
Transfer Distance: 550m
Connector Type: LC Duplex
(Cable Type: Multi-Mode Fiber (MMF
HP SFP transceiver could be mixed and deployed with HP OEM SFP transceivers for seamless network performance and interoperability. Our cost-effective HP SFP transceiver are sent to worldwide from our factory directly
SFP, SFP+ or QSFP are types of transceivers used for connecting a switch or other network device to copper or fibre cable. They are mostly used to include fiber ports. Which SFP transceiver you select depends upon the cable type, application, needed optical range for the network and the required data transmission rate
?What's an SFP
An SFP, or small form-factor pluggable, is a concise, hot-swappable transceiver made to support 100/1000Mbps Ethernet, Fibre Channel and SONET, among other communication standards. SFP transceivers support speeds up to 4.25Gbps and so are commonly found in telecommunications and data communications applications. SFP ports are located in a variety of devices, from Ethernet switches to routers, NIC cards and firewalls. Small form-factor pluggable specification is founded on IEEE802.3 and SFF-8472
SFP vs SFP+
SFP and SFP+ transceivers are practically identical in proportions and appearance. The principal difference can be that SFP+ can be an updated version that supports higher boosts to 10Gbps. The difference in data rate also makes up about a notable difference in transmission distance-SFP typically includes a longer transmission distance. SFP+ specifications are based on SFF-8431. In conditions of SFP vs SFP+ compatibility, SFP+ ports often accept SFP optics but at a lower life expectancy speed of 1Gbps. Take note, however, that you cannot plug an 10g SFP+ transceiver into an SFP port because SFP+ will not support speeds significantly less than 1Gbps
?Exactly what is a QSFP Port
QSFP, or quad small form-factor pluggable, is a different type of compact, hot-swappable transceiver. It supports Ethernet, Fiber Channel, InfiniBand and SONET/SDH standards with different data rate options. QSFP modules are generally available in a number of different types: 4x1Gbps QSFP, 4x10Gbps QSFP+, 4x28Gbps QSFP28
QSFP+ and QSFP28 will be the latest versions, which support numerous 40Gbps and 100Gbps applications. Both QSFP+ and QSFP28 modules integrate 4 transmit and 4 receiver channels. While QSFP+ supports 4x10Gbps or 1x40Gbps, QSFP28 can do 4x25Gbps, 2x50Gbps or 1x100Gbps, depending on the transceiver used. The specifications for QSFP derive from SFF-8436
?How to Choose SFP Transceivers
Furthermore to SFP vs SFP+ vs QSFP, you’ll also have to consider the application form. SFP transceivers can be found in various types based on what they'll be used for, for example, single-mode vs multimode SFP. Single-mode SFP transceiversuse single-mode fiber, whereas multimode SFPs are appropriate for multimode fiber. Additionally, there are long-reach WDM SFP transceivers for multiplexing, simplex SFPs for single fiber applications, video SFP transceivers for transmission of high-definition video, and PON SFP transceivers for fiber-based access networks. SFPs can be found in commercial and extended operating temperature ranges, with or without extended diagnostics capabilities
SFP Compatibility
Small form-factor pluggable specifications are posted in the SFP Multi-Source Agreement, which allows you to combine and match components from different vendors. However, some IT tools manufacturers sell network devices that support only vendor-specific SFPs. To make sure compatibility, review the vendor’s optics testing centeror ask your vendor to verify compatibility.Such as for example oemfibers.com
A variety of technological advancements and trends are driving the increasing need for 10 GbE in the data center. IT managers are now faced with the challenge of selecting the appropriate 10-gigabit physical media, as 10 Gigabit Ethernet (10GE) is offered in two broad categories, optical and copper, with the latter being the most commonly used means for connectivity in data centers. This article addresses the tradeoffs between your effective choices in copper connectivity 10GBase-T and SFP+ direct attach cable (DAC)
What's 10GBASE-T and Why Choose It
10GBASE-T is an IEEE 802.3an standard which supports the creation of technology that's capable of transmitting 10 Gigabit Ethernet up to 100 meters over four pairs of CAT-5 balanced copper cabling system. It really is an exciting technology that provides end users with cost-effective media to accomplish 10Gbps data rates
Like all BASE-T implementations, 10GBASE-T works for lengths up to 100 meters, giving IT managers a far greater level of flexibility in connecting devices in the info center. With versatility in reach, 10GBASE-T can accommodate either top of the rack, middle of row, or end of the row network topologies. This gives IT managers the most flexibility in server placement since it will work with existing structured cabling systems. Because 10GBASE-T is backward-compatible with 1000BASE-T, it can be deployed in existing 1 GbE switch infrastructures in data centers that are cabled with CAT6 and CAT6a (or above) cabling, enabling IT to keep costs down while offering an easy migration path to 10 GbE
What is SFP+ DAC and the Benefits of It
SFP+ direct attach cable (DAC) is a fixed assembly that is purchased at a given length, with the SFP+ connector modules permanently attached to each end of the cable. SFP+ DAC provides high performance in 10 Gigabit Ethernet network applications, using an enhanced SFP+ connector to send 10 Gbps data through one paired transmitters and receivers over a thin twinax cable or fiber optic cable. The 10G SFP+ Cable is designed to use the same port as an optical transceiver, but compared with optical transceivers, the connector modules mounted on the cable leave out the expensive optical lasers and other electronic components, thus achieving significant cost savings and power savings in short reach applications
SFP+ DAC is a low cost alternative to traditional fiber and twisted-pair copper cabling in data center deployments. SFP+ DAC provides better cable management for high-density deployments and improved electrical characteristics for the most reliable signal transmission
10GBASE-T vs 10GBASE SFP + DAC
SFP+ DAC has considerably lower overall cost when you include switch, NIC and cable, however 10GBase-T has more versatility and may reach longer distance. For data centers, the advantages of SFP+ with DAC are a very good match for today' s requirements and emerging trends. That's why SFP+ DAC is being adopted rapidly as best practice for new data centers. For wiring closets, 10GBase - T will be the obvious choice once the demand for bandwidth becomes more acute and once the price and power for 10GBase-T technology comes down
As one of the most professional optical manufacturers in China, OEMfibers solutions for 10 Gigabit Ethernet include 10G SFP+ direct attach fiber cable, 10G SFP+ direct attach copper cable. Besides, we also provide high-quality 10G SFP transceivers, like EX-SFP-10GE-LR , SFP-10G-LR-X, SFP-10G-SR-X, etc
The copper optical transceiver can be split into SFP copper optical transceiver, SFP+ copper optical transceiver and GBIC copper optical transceiver according to different package types
1.SFP copper optical transceiver: Based on the difference of transmission rate, it may also be divided into 100M copper optical transceiver, Gigabit copper optical transceiver and adaptive copper optical transceiver, and adaptive copper optical transceiver
2.SFP+ copper optical transceiver: also known as 10G copper modules , the speed is 10G, designed for high-speed communication links, mainly used in 10 Gigabit Ethernet, and its power consumption is also very small. In addition, the SFP+ copper optical transceiver may be the first 10G optical module to transmit through a network cable, which can be used in the SFP+ port of a switch or network card to achieve connection with network devices with RJ45 interfaces;
3.GBIC copper optical transceiver: It really is an copper optical transceiver with package type GBIC. The transmission rate can reach 1000Mbps and the utmost transmission distance can reach 100m
The Copper modules could be split into three types: 10G SFP+, 100Base SFP and adaptive copper optical transceiver based on the speed. The next can be an introduction of these three various kinds of copper optical transceiver
100Base SFP copper optical transceiver can be utilized when the network port of these devices is insufficient, that's, the SFP optical port is converted into an RJ45 electrical port utilizing the SFP copper optical transceiver. The electrical interfaces of 100Base SFP copper optical transceiver and SFP optical modules are the same. The difference can be that the external one uses an electrical port (ie RJ45 interface) and one optical port
The 10G SFP+ copper optical transceiver is also called a 10 Gigabit copper optical transceiver. Its rate is certainly 10G. It is created for high-speed communication links and is normally mainly utilized in 10 Gigabit Ethernet. The standards for 10 Gigabit optical modules are IEEE 802.3ae, IEEE 802.3ak and IEEE 802.3an, if distinguished by package form, 10 Gigabit optical modules include 10G SFP+ optical module, BIDI SFP+ optical module, CWDM SFP+ optical module, DWDM SFP+ optical module , 10G XFP optical module, BIDI XFP optical module, CWDM There are nine types of XFP optical modules, DWDM XFP optical modules and 10G X2 optical modules
And its own power consumption is nearly half of the optical module power consumption, so that it is a great power optimization solution. Furthermore, the 10G SFP+ copper optical transceiver is the first 10G optical module to transmit through a network cable. It can be used in the SFP+ port of a switch or network card to accomplish reference to network devices with RJ45 interfaces
10 Gigabit optical module with powerful and high reliability is principally used to realize 10G Ethernet transmission in the super six or seven copper wiring system, the transmission distance can reach 30 meters. Weighed against SFP+ high-speed cable, it could conserve at least 0.5W of power consumption, and its own ports can support both shielded twisted pair and unshielded twisted pair
The adaptive copper optical transceiver is a Gigabit optical module with the capacity of integrating 10/100/1000BASE three rates onto a CMOS chip. It can be utilized for high-speed Ethernet and Gigabit Ethernet, unlike other copper optical transceiver. This copper optical transceiver is more innovative in conditions of speed and can meet different application requirements
Center wavelength: There are currently three main types:
850nm (MM, multi-mode, low cost but short transmission distance, generally can only transmit 500M);
1310nm (SM, single mode, huge loss during transmission but small dispersion, generally used for transmission within 40KM);
1550nm (SM, single-mode, low loss during transmission but large dispersion, generally used for long-distance transmission above 40KM, and will transmit 120KM directly without relay at most).
Transmission distance: Optical transceivers generally have the following specifications: multi-mode 550m, single-mode 15km, 40km, 80km and 120km, etc.
Optical transceivers with transmission distances within 40KM generally use FP lasers;
Optical transceivers with transmission distance ≥40KM generally use DFB lasers.
2.Parameters of Gigabit optical transceiver:
Central wavelength: The central wavelengths of the Gigabit optical transceiver are mainly 1310nm, 1470nm, 1550nm, 1330nm-TX/1270nm-RX. The optical transceiver with the central wavelength of 1550nm is certainly a single-mode optical transceiver, and its transmission distance can reach Above 40km.
Transmission distance: The transmission distance of the Gigabit optical transceiver ranges from 20km to 120km, and the transmission distance of most Gigabit optical transceivers is around 100km.
Interface: Except that the interface of the GBIC Gigabit optical transceiver is normally SC duplex, the interfaces of the remaining 10 Gigabit optical transceivers are LC duplex.
Fiber type: 10 Gigabit optical transceivers are usually used with single-mode fiber, so its fiber type is SMF.
Laser type: The laser types of the Gigabit optical transceiver are mainly DFB 1550nm, DFB BiDi, DFB 1310nm, DFB CWDM, DFB DWDM.
DOM function: Except for GBIC optical transceiver that does not support DOM function, other Gigabit optical transceivers support DOM function. The reason being GBIC optical transceiver is an early optical transceiver.
3.Parameters of 10 Gigabit optical transceiver:
Central wavelength: The central wavelengths of 10 Gigabit optical transceivers are 1470nm, 1550nm, 1590nm, 1330nm-TX/1270nm-RX, of which 1330nm-TX/1270nm-RX are BiDi optical transceivers.
Transmission distance: The transmission distance of 10 Gigabit optical transceivers varies from 20 km to 80 km, but the transmission distance of all 10 Gigabit optical transceivers is 80 km.
Interface: Except that the interface of XENPAK 10 Gigabit optical transceiver is SC duplex, the interface of the other 10 Gigabit optical transceivers are all LC duplex.
Fiber type: The fiber type of the 10 Gigabit optical transceiver is the same as the Gigabit optical transceiver, which is SMF.
Laser type: The laser types of the 10 Gigabit optical transceiver include EML 1550nm, DFB BiDi, EML CWDM, EML DWDM, and DFB CWDM. From the type of laser, we can derive its center wavelength or package type information.
DOM function: 10 Gigabit optical transceivers are equipped with DOM function. This function can help network administrators to monitor all aspects of optical transceiver data in real time. Network administrators can also check these data to ensure that the optical transceiver works normally.
In the application, you should choose 100M optical transceiver, Gigabit optical transceiver or 10G optical transceiver , which mainly depends on the kind of network adapted. For example, if your network is usually 100M Ethernet, you need to use 100M optical transceiver, which is definitely Gigabit Ethernet. Gigabit optical transceivers are required for the network, and 10 Gigabit Ethernet transceivers are used for the 10 Gigabit Ethernet.
Before you start discussing choosing an optical transceiver, we need to have a basic understanding of the general packaging of the optical transceiver. This part will introduce SFP, SFP+, QSFP+QSFP28 and packaged optical transceivers, such as GBIC, XFP, CFP optical transceiver packages, do not stop here.
SFP optical transceiver
As the mini version of the GBIC optical transceiver, the functions of the two transceivers are almost the same, but the volume of the optical transceiver is much smaller than the GBIC optical transceiver. The GBIC optical transceiver is generally used in high-speed transmission applications such as for example SONET/SDH network and 100M/Gigabit Ethernet.
10G SFP+ optical transceiver
The 10g SFP+ optical transceiver is an upgraded version of the SFP optical transceiver. The physical packaging of both transceivers is the same. However, SFP+ optical transceivers can support a transmission rate of 10Gbps. Compared with various other 10G optical transceivers (such as xenpak and XFP optical transceivers ), SFP+ optical transceivers have the smallest volume and are most suitable for high-density port applications. Now it is among the most popular 10G optical transceiver.
40GQSFP/QSFP+ optical transceiver
40G QSFP/QSFP+ optical transceiver meets Ethernet, Fibre Channel, InfiniBand and SONET/SDH standards, using 4Gbit of the data transmission channel 4 40G QSFP optical transceiver/s, 40G QSFP+ four transceivers of the optical transmission channel 10Gbit/ s data.
QSFP28 optical transceiver
Qsfp28 optical transceiver is mainly used for 100g Ethernet and EDR Infiniband applications. It uses four 25gbit/s transmission channels to transmit data. Sometimes this optical transceiver is also called qsfp100 or 100g qsfp optical transceiver.
When purchasing optical transceivers, the following five points are the factors that need to be paid attention to:
Transmission distance
The support of optical transmission transceivers at different distances is different. In general, the transmission distance of multimode optical transmission transceivers is a lot shorter than that of single-mode optical transceivers, and the price is definitely cheaper. For example, the transmission distance of a 10GBASE-SR SFP + optical transceiver can be The transmission distance is certainly 400 meters, and the 10GBASE-LR SFP + optical transceiver can reach 10km. As a result, it is very important to specify the transmission distance to be achieved. In addition, considering the attenuation and dispersion of the optical signal during transmission, it is recommended to use a slightly larger supported transmission distance compared to the actual needs of the optical transceiver. For short-distance connection between racks in the products, it is suggested that you use cheaper than high-speed optical transceiver cable products.
Transmission mode
There are three main data transmission methods for optical transceivers: simplex, half-duplex, and full-duplex. Simplex transmission only supports one-way data transmission; half-duplex transmission allows two-way data transmission, but only one-way transmission at a time; full-duplex transmission allows simultaneous two-way data transmission. It is best to choose an optical transceiver that supports full-duplex transmission.
Transmission medium
Copper and optical cables will be the two most widely used transmission media. For that reason, some optical transceivers are designed with electric ports, and some optical transceivers were created with optical ports. Generally speaking, optical transceivers are used for 10G and 40G Ethernet transmission applications, and optical transceivers are used for electrical ports for 100mb and Gigabit Ethernet applications. Optical ports are usually used for optical transceivers farther than optical transceivers for electrical ports.
Heat resistance
The operating temperature of the optical transceiver should not be too high. If the temperature exceeds the temperature that the optical transceiver can withstand, there could be a link failure. Therefore, an optical transceiver with good heat resistance should be selected.
Some are just buying the optical transceiver often taking into account the above factors, in addition, we also need to consider the operating wavelength, operating speed, and other aspects of brand manufacturers.Read more:www.oemfibers.com
The 40-Gigabit QSFP+ transceiver module is normally a hot-swappable, parallel fiber-optical module with four independent optical transmit and receive channels. These channels can terminate in another 40G QSFP+ transceiver , or the channels can be broken out to four separate 10-Gigabit SFP+ transceivers. The QSFP+ transceiver module connects the electrical circuitry of the system with either a copper or an optical external network.
10GBASE X2 modules offer customers a wide variety of 10 Gigabit Ethernet connectivity options for data center, enterprise wiring closet, and service provider transport applications.
Difference between QSFP+ and X2
QSFP+
1.QSFP+ MSA, SFF-8436 compatible
2.Four independently addressable transmit and receive channels
3.Highly compact: savings of 60% on edge and board use compared to four comparable SFP+ modules
4.Electrically hot-pluggable
5.XFP-like latch mechanism for ease-of-insertion
6.Digital Diagnostics Monitoring Interface. allows customer management and monitoring of key modules parameters, analogous to SFP+
7.Optical connectivity via industry standard MPO/MTP terminated fiber ribbon
X2 10G
1.Compatible with SENPAK MSA Rev 3.0
2.Support of IEEE 802.3ae 10GBASE-L
3.XENPAK MSA package with duplex LC connector
4.With Digital Diagnostic Monitor Interface
5.Operating temperature range 0 to 70 degrees Celsius
6.Hot Pluggable 70-PIN Connector with XAUI Electrical Interface
Applications
The QSFP+ transceiver can be used primarily in short reach applications in switches, routers, and data centre equipment where it provides higher density than QSFP+ modules . The X2 offer customers a multitude of 10 Gigabit Ethernet connectivity options for data center, enterprise wiring closet, and company transport applications.
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The 100G optical modules are booming in 2017. And there are many types of 100G optical transceivers on the market such as for example CFP modules and QSFP28. Anyone who has experienced in using optical transceivers may know each sort of transceiver provides their own functional mode. And knowing this functional mode allows you to pick the suitable 100G optics for your networks.
CFP SR10
CFP SR10 is a 100Gbps parallel transceiver for optical communication applications. It supports link lengths of 100 m and 150 m on laser-optimized OM3 and OM4 cable. This transceiver converts the 10-channel 10Gbps electrical input data into 10-channel 850nm optical signals and then coupling them into ribbon fiber array (MPO connector) for 100Gbps optical signal transmission. On the receiver side, the optical signals are changed into electrical data for 10 output channels. Following is the functional diagram.
CFP LR4
CFP LR4 is another person in 100G CFP modules. But its working procedure is just a little not the same as CFP SR10 module . CFP LR4 uses four channels for transmitting and four channels for receiving. It uses four WDM optical signals and multiplexes them right into a single channel for 100G transmission. On the receiver side, it demultiplexes the 100Gbps signals into four WDM optical signals and converts them into four output channels. Its functional diagram is below.
QSFP28 SR4
QSFP28 SR4 can be a parallel optical transceiver. It provides four channels for transmitting and four channels for receiving, each with the capacity of 25Gb/s procedure for an aggregate data rate of 100Gbps on 100 meters of multimode fiber, which is comparable to the CFP LR4. However, the QSFP28 SR4 doesn’t multiplex the optical signals into WDM for transmitting. Its functional diagram is definitely shown below.
QSFP28 PSM4
The functional mode of QSFP28 PSM4 is a lot similar compared to that of QSFP28 SR4. It uses four independent transmit and receive channels. Each channel operates at 25Gbps. The difference mainly is based on the fiber they make use of. QSFP28 PSM4 works on single mode ribbon fiber cable, while QSFP28 SR4 works on multimode ribbon fiber cables.
QSFP28 CWDM4
Similar to PSM4, the QSFP28 CWDM4 also uses 4x25Gbps to attain 100Gbps. However the difference can be that the CWDM4 utilizes an optical MUX and DEMUX to lessen the fiber it requires, which is similar to the CFP LR4. It just requires a duplex single mode fiber cable for connecting two 100G CWDM4 optical modules. At the moment, CWDM4 links are found in both 100G CFP4 or the QSFP28 optical transceivers .
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Both optical patch cord and optical transceiver have single mode / multimode. If the collocation is usually wrong when using, it will lead to the parameter error of the optical modules. How exactly to match the use of patch cord and optical transceiver?
What are the variations between single mode and multimode optical transceiver?
The wavelength of single mode modules are 1310nm and 1550nm, transmission distance can up to 160KM. A metropolitan area network that is commonly used for long distance and relatively high transmission rates.
The wavelength of single mode modules is 850nm, transmission distance can only up to 2KM. Used in short-distance transmissions.
What are the distinctions between single mode and multimode optical fiber?
Single mode fiber transmission has high frequency bandwidth, long transmission distance and high cost; The core diameter is definitely small, usually is 9/125um Singlemode patch cords ; Dispersion can be small, allowing only one mode to transmit. Single mode optical fiber can transmit optical fiber directly to the center, generally useful for long distance data transmission.
Multimode fiber has low transmission speed and short distance, but its cost is relatively low; With a larger diameter, usually is certainly 50 or 62.5 um; The dispersion is normally large, hundreds of mode transmissions are allowed. Multimode fibers are often used in short distance data transmission.
Optical modules and patch cords must be properly matched for normal use.
If the optical fiber in the info center are all multimode, then you'd better use multimode optical modules, single mode and multimode can't be mixed. Because the core diameter of single-mode fiber and multimode fiber is very different, it will cause too much loss when matching.Know more:www.oemfibers.com
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ST (an AT&T Trademark) was probably still most popular connector for multimode networks until 2005. It has a bayonet mount and a long cylindrical 2.5 mm ceramic (usually) ferrule to hold the fiber. Most ferrules are ceramic, but some are metal or plastic. A mating adapter is used to mate two connectors. And because ST connectors are spring-loaded, you have to make sure they are seated properly. If you have high loss, reconnect them to see if it makes a difference.
The ST/SC/FC/FDDI/ESON connectors have the same ferrule size - 2.5 mm or about 0.1 inch - so they can be mixed and matched to each other using hybrid mating adapters. This makes it convenient to test, since you can have a set of multimode reference test cables with ST or SC connectors and adapt to all these connectors.
SC
SC is a snap-in connector also with a 2.5 mm ferrule that is widely used for it's excellent performance. It was the connector standardized in TIA-568-A, but was not widely used at first because it was twice as expensive as a ST. Now it's only a bit more expensive and much more common It's a snap-in connector that latches with a simple push-pull motion. It is also available in a duplex configuration.
FC
FC was one of the most popular singlemode connectors for many years. It also uses a 2.5 mm ferrule, but some of the early ones use ceramic inside stainless steel ferrules. It screws on firmly, but you must make sure you have the key aligned in the slot properly before tightening. It's been mostly replaced by SCs and LCs.
Mating Dissimilar Connectors
The ST, SC and FC connectors share a 2.5 mm ferrule design so they can be mated to each other. To do so requires a hybrid mating adapter.
From the top:
ST>FC
SC>FC
SC>ST
In the past, you could also get hybrid adapters for these connectors to FDDI and ESCON connectors which used the same ferrule.
LC
LC is a small form factor connector that uses a 1.25 mm ferrule, half the size of the SC fiber patch cable. Otherwise, it's a standard ceramic ferrule connector, easily terminated with any adhesive. Good performance, highly favored for singlemode.
The LC, MU and LX-5 use the same ferrule but cross-mating adapters are not easy to find.
MPO
MPO is a 12 fiber connector for ribbon cable, often called an array connector. The connector ferrule is plastic and contains 12 or 16 fibers in a row. The versions with 12 fiber rows can theoretically have 6 rows but more than two are rare. The 16 fiber rows are limited to 2 rows. Fiber ferrule alignment is by pins in one ferrule and holes in the other.
The MPO main use is for preterminated cable assemblies and cabling systems. Here is a 12 fiber MT broken out into 12 STs. It is also used for higher speed multimode links (40 or 100Gb/s) that use parallel optics.
MPO means multi-position optical. This connector is sometimes called a MTP cable which is a commercial name. It is covered in the TIA connector intermateability standard(TIA-604-5) for the 12 fiber version and OEMfibers for the 16 fiber version..
For more information on the MPO connector, including its issues with polarity and testing, go here
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