There are many types of fiber optic transceiver used in fiber optic transmission. 1000BASE-LX/LH SFP, one of the commonly used optical transceiver, is now widely used in optical network systems. Here are some common questions we might have when using Cisco 1000BASE-LX/LH SFP (GLC-LH-SM or GLC-LH-SMD) transceivers. And from the answers, we might have a deeper understanding of using these fiber optics.
Q1: Can 1000BASE-LX compatible with 100BASE-LX?
A1: 1000BASE-LX and 100BASE-FX are very different standards. 1000BASE-LX SFP (GLC-LH-SMD) and 100BASE-LX SFP (GLC-FE-100LX) are 2 module types, one for GE and one for FE slots. The GLC-LH-SMD will not operate at 100Mbps. You will need to use a 100Mb module to connect to another device at 100Mb. Check optical transceiver compatibility with your equipment by reviewing the Cisco Fast Ethernet SFP module compatibility document and choose the one it says is compatible.
Q2: What is the difference between LH and LX modules?
A2: Long Haul (LH) denotes longer distances while Long Wavelength (LX) denotes less energy which is obviously shorter distance. Before it was standardized 1000BASE-LX10 was essentially already in widespread use by many vendors as a proprietary extension called either 1000BASE-LX/LH or 1000BASE-LH.
Q3: Does 1000BASE-LX SFP work with 1000BASE-LH SFP? What does it infer if a module says like "Cisco 1000BASE-LX/LH SFP"?
A3: Yes, the 1000BASE-LX will work with the 1000BASE-LH. For instance, Cisco 1000BASE-LX/LH SFP is either made for single mode (long distance) / multimode (short distance). But this module can be used for both Single-mode and Multimode. The Cisco 1000BASE-LX/LH SFP, compatible with the IEEE 802.3z 1000BASE-LX standard, operates on standard single-mode fiber-optic link spans of up to 10 km and up to 550 m on any multimode fibers. When used over legacy multimode fiber type, the transmitter should be coupled through a mode conditioning patch cable.
Q4: What about Mode Conditioning Patch cords (MCP)?
A4: When selecting an optical transceiver, watch the transceiver’s user documentation for when a MCP should be used (see previous link for MCP information). They are sometimes required when your network’s installed optical cable is OM1 or OM2 rated multimode fiber (MMF). In short, the MCP is an optical jumper that transitions the transmit fiber from a single mode fiber (SMF) to a multimode fiber.
Q5: GLC-LH-SM SFP to 1000BASELX GBIC won't link over MMF?
A5: Cisco compatibility document says: "Some customers might be tempted to connect 1000BASE-LX/LH devices over short reaches of MMF jumper cables without MCP cables. There is a risk associated to this type of nonstandard deployment, especially when the jumper cable is an FDDI-grade or OM1 type. In such case the power coupled directly into a 62.5-micron fiber could be as high as a few dBm (typically 5 to 6 dBm), and if the jumper cable is short, the adjacent receiver will be saturated, causing high bit error rate, and eventually irreversibly damaged. We recommend the use of MCP, but if the customer remains reluctant to the deployment of MCP, a 5-dB attenuator for 1300nm should be used and plugged at the transmitter of the optical module on each side of the link."
Q6: Does GLC-LH-SMD working with GLC-LH-SM?
A6: Yes. Both the GLC-LH-SM and GLC-LH-SMD transceivers support the IEEE 802.3 1000BASE-LX/LH standard and so are compatible with each other. The difference between the two is that the GLC-LH-SMD transceiver has additional support for Digital Optical Monitoring capability.
Q7: How much bandwidth can my single mode fiber (SMF) support?
A7: Single mode fiber has an extremely large bandwidth capacity. The following diagram shows how bandwidth can be scaled on SMF. Scaling bandwidth on fiber is not inexpensive. Depending upon the network, it may be more cost effective to install additional fibers instead of adding WDM technology.
Click through to browse GLC-LH-SMD price
Reference: www.sfp-transceiver-modules.com
Warm Tips: Fiberstore offers amount of in-stock 1000BASE-LX/LH SFP which are compatible for Cisco, Juniper, Dell, Finisar, Brocade, or Netgear (AGM732F) in 10/20 Km options.
Showing posts with label 1000BASE-LX/LH SFP. Show all posts
Showing posts with label 1000BASE-LX/LH SFP. Show all posts
Wednesday, June 24, 2015
Wednesday, June 17, 2015
1.25G SFP Transceiver Alternative Solution
Introduction
SFP (Small Form Pluggable) optical module is a compact transceiver used for both telecommunications and data communication applications. It can interface a network device motherboard (for a switch, router, media converter or similar device) to a Fiber Channel or Gigabit Ethernet (GbE) optical fiber cable at the other end. Due to its small size, it has replaced the formerly ubiquitous Gigabit Interface Converter (GBIC) gradually. And now it becomes the most used fiber optic transceiver module in the fiber communication industry.
SFP Module Series
SFP transceivers are available in a wide range of data rates and fiber coverages, which allows users to choose the most suitable transceiver for each link. Most used SFP transceivers are the 1.25 Gbps transceiver modules which are of different transmitter and receiver types such as 1000BASE-T, 1000BASE-SX, 1000BASE-LX/LH, etc. Here depict such kinds of transceivers.
1000BASE-SX SFP Transceiver
1000BASE-SX SFP transceiver is a cost effective 850nm module supporting dual data-rate of 1.25Gbps/1.0625Gbps. It is compatible with the IEEE 802.3z 1000BASE-SX standard and operates multimode fibers link up to 550 m. The fiber optic transceiver consists of three sections: a VCSEL laser transmitter, a PIN photodiode integrated with a trans-impedance preamplifier (TIA) and MCU control unit. It is usually applied for Fiber Channel links, Gigabit Ethernet links, Fast Ethernet links, etc.
1000BASE-LX/LH SFP Transceiver
1000BASE-LX/LH SFP transceiver is a high performance 1310nm transceiver for single-mode fibers. It is compatible with the IEEE 802.3z 1000BASE-LX standard and also supports dual data-rate of 1.25 Gbps/1.0625 Gbps with a transmission distance of 10 /15 /20 km. It has three part numbers: SFP-1G31-10-xx, SFP-1G31-15-xx and SFP-1G31-20-xx. The transceiver consists of three sections: a FP laser transmitter, a PIN photodiode integrated with a trans-impedance preamplifier (TIA) and MCU control unit. It is commonly applied for Gigabit Ethernet links, Fiber Channel Switch Infrastructure and other optical transmission systems.
10/100/1000BASE-T SFP Transceiver
10/100/1000BASE-T SFP Transceiver is compatible with the Gigabit Ethernet standard as specified in IEEE STD 802.3. It supports data rates of 10/100/1000 Mbps, fully satisfying 10/100/10001000BASE-T applications such as LAN 10/100/1000Base-T Fiber Channel links, Gigabit Ethernet over Cat 5 Cable, Switch to Switch Interface, Router/Server interface, etc.
Fiberstore Solutions
Fiberstore is a professional manufacturer and supplier for transceiver solutions. We offer such modules which are 100% compatible with large inventories. All those modules are delivered on the day for your convenience. In addition, we are committed to high-quality products and long-term customer confidence with providing return and warranty services. The detailed ordering information is as followed. If interested in our products, you can visit www.fiberstore.com or contact us over sales@fiberstore.com.
Originally published at: www.fiber-optic-equipment.com
| Module # | Data Rate | Transmission Distance | Connector Type | Price | Inventory |
| 1000BASE-SX SFP Transceiver | ≤ 1.25 Gbps | 550 m | LC | US$ 8.00 | 2000 |
| 1000BASE-LX/LH SFP 1310 nm Transceiver | ≤ 1.25 Gbps | 10/15/20 km | LC | US$ 10.00 | 5500 |
| 10/100/1000BASE-T SFP Transceiver | 10/100/1000 Mbps | 100 m | RJ45 | US$ 18.00 | 1000 |
Sunday, April 12, 2015
What are the differences between LX, LH and LX/LH?
We usually see LX SFP, LH SFP and LX/LH SFP on many websites, and many people show their confusion about them. Whether they are the same or different? If they are dissimilar, what differences between them on earth?
The Commonly Used 1000BASE-X Standards about Ethernet
Ethernet was the result of the research done at Xerox PARC in the early 1970s. Ethernet later evolved into a widely implemented physical and link layer protocol. Fast Ethernet increased speed from 10 to 100 megabits per second (Mbit/s). Gigabit Ethernet was the next iteration, increasing the speed to 1000 Mbit/s. The initial standard for Gigabit Ethernet was produced by the IEEE in June 1998 as IEEE 802.3z, and required optical fiber. 802.3z is commonly referred to as 1000BASE-X, which is used in industry to refer to Gigabit Ethernet transmission over fiber, where options include 1000BASE-SX, 1000BASE-LX, 1000BASE-LX10, 1000BASE-BX10 or the non-standard -EX and -ZX implementation.
Gigabit Ethernet 1000BASE-LX Optical Interface Specifications
1000BASE-LH and 1000BASE-LX/LH Optical Interface Specifications
LH refers to Long Haul. Many vendors use both LH and LX/LH for certain SFP modules, but they aren’t a Gigabit Ethernet standard at all. 1000BASE-LX/LH SFP can achieve a distance up to 25km over single mode fiber. Unlike 1000BASE-LX/LH SFP, 1000BASE-LH SFP operates a distance up to 70km over single mode fiber.
Conclusion
In a word, the 1000BASE-LX, 1000BASE-LH and 1000BASE-LX/LH are all refer to Gigabit Ethernet transmission. Among them, the 1000BASE-LX is a standard, the 1000BASE-LH and 1000BASE-LX/LH just are terms widely used by vendors. Other long haul transmission standards include 1000BASE-LX10, 1000BASE-EX and 1000BASE-ZX. We can see their differences more clearly in the following chart:
| Name | Medium | wavelength | Specified distance |
| 1000BASE-LX/LH | 9/125 Single mode fiber | 1310nm | 10km |
| 1000BASE-LX | 62.5/125, 50/125 Multi mode fiber | 1310nm | 550m |
| 1000BASE-LX10 | 9/125 Single mode fiber | 1310nm | 10km |
| 1000BASE-LH | 9/125 Single mode fiber | 1310nm | 25~70km |
| 1000BASE-EX | 9/125 Single mode fiber | 1310nm | 40km |
| 1000BASE-ZX | 9/125 Single mode fiber | 1550nm | 70km |
Fiberstore is a professional OEM manufacturer and supplier of optical networking solutions. Fiberstore's 1000BASE-LX SFP and 1000BASE-LX/LH SFP is 100% compatible with major brands like Cisco, HP, Juniper, Nortel, D-link, Netgear and Brocade. We can see the order information clearly in the following chart:
| Brand | Models | Description |
| Fiberstore | SFP-1G31-10-xx
|
1.25Gbps 1000BASE-LX/LH SFP 1310nm 10km SMF |
| Cisco | GLC-LX-SM-RGD | Cisco GLC-LX-SM-RGD Compatible 1000BASE-LX/LH SFP 1310nm 10km IND |
| D-Link | DEM-310GT | D-Link DEM-310GT Compatible 1000BASE-LX SFP 1310nm 10km SMF |
| HP | J4859C | HP J4859C Compatible 1000BASE-LX SFP 1310nm 10km SMF |
| HP | JD119B | HP JD119B X120 Compatible 1000BASE-LX SFP 1310nm 10km SMF |
| Netgear | AGM732F | Netgear AGM732F Compatible 1000BASE-LX SFP 1310nm 10km SMF |
| Brocade | E1MG-LX-OM | Brocade E1MG-LX-OM Compatible 1000BASE-LX SFP 1310nm 10km DDM SMF |
| Brocade | E1MG-LX-OM-T | Brocade E1MG-LX-OM-T Compatible 1000BASE-LX SFP 1310nm 10km DDM IND |
| Linksys | MGBLX1 | Linksys MGBLX1 Compatible 1000BASE-LX SFP SMF |
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