Tag Archives: 1000BASE-SX SFP

The Basics of 1000BASE-SX and 1000BASE-LX SFP

Gigabit Ethernet has been regarded as a huge breakthrough of telecom industry by offering speeds of up to 100Mbps. Gigabit Ethernet is a standard for transmitting Ethernet frames at a rate of a gigabit per second. There are five physical layer standards for Gigabit Ethernet using optical fiber (1000BASE-X), twisted pair cable (1000BASE-T), or shielded balanced copper cable (1000BASE-CX). 1000BASE-LX SFP and 1000BASE-SX SFP are two common types of optical transceiver modules in the market. Today’s topic will be a brief introduction to 1000BASE-LX and 1000BASE-SX SFP transceivers.

1000BASE in these terms refers to a Gigabit Ethernet connection that uses the unfiltered cable for transmission. “X” means 4B/5B block coding for Fast Ethernet or 8B/10B block coding for Gigabit Ethernet. “L” means long-range single- or multi-mode optical cable (100 m to 10 km). “S” means short-range multi-mode optical cable (less than 100 m).

1000BASE-SX is a fiber optic Gigabit Ethernet standard for operation over multi-mode fiber using a 770 to 860 nanometer, near infrared (NIR) light wavelength. The standard specifies a distance capability between 220 meters and 550 meters. In practice, with good quality fiber, optics, and terminations, 1000BASE-SX will usually work over significantly longer distances. This standard is highly popular for intra-building links in large office buildings, co-location facilities and carrier neutral internet exchanges. 1000BASE-SX SFP transceiver works at 850nm wavelength and used only for the purposed of the multimode optical fiber with an LC connector. 1000BASE-SX SFP traditional 50 microns of multimode optical fiber link is 550 meters high and 62.5 micron fiber distributed data interface (FDDI) multimode optical fiber is up to 220 meters. Take EX-SFP-1GE-SX as an example, this SX fiber transceiver supports DOM function and the maximum distance of the SX SFP is 550 m. The 1000Base-SX standard supports the multimode fiber distances shown in table 1.

1000Base-SX standard

Specified in IEEE 802.3 Clause 38, 1000BASE-LX is a type of standard for implementing Gigabit Ethernet networks. The “LX” in 1000BASE-LX stands for long wavelength, indicating that this version of Gigabit Ethernet is intended for use with long-wavelength transmissions (1270–1355 nm) over long cable runs of fiber optic cabling. 1000BASE-LX can run over both single mode fiber and multimode fiber with a distance of up to 5 km and 550 m, respectively. For link distances greater than 300 m, the use of a special launch conditioning patch cord may be required. 1000BASE-LX SFP is intended mainly for connecting high-speed hubs, Ethernet switches, and routers together in different wiring closets or buildings using long cabling runs, and developed to support longer-length multimode building fiber backbones and single-mode campus backbones. E1MG-LX-OM is Brocade 1000BASE-LX SFP, this LX single-mode transceiver operates over a wavelength of 1310nm for 10 km.


Difference Between LX, LH and LX/LH
Many vendors use both LH and LX/LH for certain SFP modules, this SFP type is similar with the other SFPs in basic working principle and size. However, LH and LX/LH aren’t a Gigabit Ethernet standard and are compatible with 1000BASE-LX standard. 1000BASE-LH SFP operates a distance up to 70km over single-mode fiber. For example, Cisco MGBLH1 1000BASE-LH SFP covers a link length of 40km that make itself perfect for long-reach application. 1000BASE-LX/LH SFP can operate on standard single-mode fiber-optic link spans of up to 10 km and up to 550 m on any multimode fibers. In addition, when used over legacy multimode fiber type, the transmitter should be coupled through a mode conditioning patch cable.

1000BASE-LX SFP and 1000BASE-SX SFP are the most commonly used components for Gigabit Ethernet application. With so many types available in the market, careful notice should be given to the range of differences, both in distance and price of multimode and single-mode fiber optics. FS.COM offers a large amount of in-stock 1000BASE SFP transceivers which are compatible for Cisco, Juniper, Dell, Finisar, Brocade, or Netgear in various options. If you have any requirement of our products, please send your request to us.

Related Article: How to Solve the Problems When Using SFP Optical Transceiver
A Quick Overview of Cisco 1000BASE-T GLC-T SFP Copper Module

A Cost-effiective Solution – Cisco Compatible SFP

According to the report of Gartner, Cisco has taken up almost half of the global network equipment market share (totally $38 billion), ahead of other competitors in the telecommunication industry. To a large extend, it is the switches’ market share that attributes to this success. Cisco SFP is the small form factor pluggable module that is usually plugged into the switch. But its price is very high, even up to thousands of dollars. The highly cost is the reason why many customers hesitate to buy it. So in this case, in order to offer a cost-effective solution for you, Cisco compatible SFP in Fiberstore comes around.

Why Choose Fiberstore

Cisco compatible SFP offered by Fiberstore are the most cost-effective standards-based SFP modules fully compatible with Cisco switches & routers. The main advantage of Cisco compatible SFP over Cisco SFP is its cost, which makes it become the cost-effective solution. Here we are going to give a price comparison by taking some examples.

Model Number Price of Cisco compatible SFP Price of Cisco SFP
GLC-T $16.00 $ 395.00
GLC-LH-SMD $7.00 $ 995.00
GLC-LH-SM $7.00 $ 995.00
GLC-SX-MM $6.00 $ 500.00

With this great advantage, Fiberstore has become one of the best-sellers in this industry. What is more, besides the above kinds, various kinds of Cisco Compatible SFPs with good quality and service are also offered here.

Features & Applications of Fiberstore Cisco Compatible SFP

The capacity of Fiberstore Cisco compatible SFP modules is as good as Cisco SFP. They are both of low-power consumption, operating on Cisco switches steady. Generally, there are three kinds of Cisco compatible SFP modules designed to used for three main applications. They are Fast Ethernet SFP, Cisco Gigabit Ethernet SFP and WDM SFP. Next, each application will be given a brief description.

Fast Ethernet SFP – Fast Ethernet SFP comes in six configurations which can be described as the Cisco 100BASE-X SFP. It is a hot-swappable input/output device that plugs into Fast Ethernet ports, dual-rate Fast/Gigabit Ethernet ports, or Gigabit Ethernet ports of a Cisco switch or router, linking the port with the fiber cabling network. One of its configuration is 100BASE-FX SFP, operating on ordinary multimode fiber optic (MMF) link spans up to 2 kilometers long. But there is a point you should note that Cisco offers two products for 100BASE-FX. One is GLC-FE-100FX is for 100Mbps Ethernet ports, and the other one is GLC-GE-100FX is for Gigabit Ethernet ports. Both products can be found in Fiberstore with compatible solution.


Gigabit Ethernet SFP – SFP for Gigabit Ethernet can be described as Cisco 1000BASE-X SFP, which plugs into a Gigabit Ethernet port or slot. Compared with Fast Ethernet SFP, its speed and capacity are better. And currently, it still plays an important part in the telecommunication networks. For example, 1000BASE-SX SFP, which is a cost effective module with high performance, can support dual data-rate of 1.25 Gbps/1.0625 Gbps and 550m transmission distance with MMF.


CWDM & DWDM SFP – The speed of CWDM & DWDM SFP can be up to 10 Gbps, with a full options of wavelength for both CWDM and DWDM applications. They both allow enterprises, companies and service providers to provide scalable and easy-to-deploy Gigabit Ethernet and Fibre Channel services in their networks.

Nowadays, Fiberstore has become one of the leaders in compatible optical transceiver modules global manufacturer and supplier trade. At present, there are a lot of discounts for bulk orders in Fiberstore. For more information, please contact us directly over e-mail sales@fs.com.