Tag Archives: SFP Transceiver

Overview of 1000BASE-BX SFP Bidi Transceiver

In communication networks, many transmission lines need bidirectional transmission. This need leads to the development of Bidirectional (BiDi) transceivers, which can transmit and receive data to/from interconnected equipment through a single optical fiber. BiDi transceivers are fitted with wavelength division multiplexing (WDM) diplexers, which combine and separate data transmitted over a single fiber based on the wavelengths of the light. BiDi transceivers must be deployed in matched pairs, with their diplexers tuned to match the expected wavelength of the transmitter and receiver that they will be transmitting data from or to. In this post, a kind of BiDi transceiver, 1000BASE-BX SFP BiDi transceiver will be introduced.

Introduction

1000BASE-BX is a part of the Gigabit Ethernet standard related to transmission over fiber optic cable. 1000BASE-BX SFP modules are compliant with SFP Multi-Source Agreement (MSA) specification and SFF-8472, and conform to the IEEE 802.3ah 1000BASE-BX10 standard. 1000BASE-BX SFP modules include 1000BASE-BX-U SFP module and 1000BASE-BX-D SFP module. These two SFP modules must be used in pairs to permit a bidirectional Gigabit Ethernet connection using a single strand of single mode fiber (SMF) cable. These transceivers transmit and receive signals on one fiber strand using two wavelengths in each direction. These hot pluggable optical transceivers consist of two sections: the transmitter section uses 1490nm DFB laser/1310nm Fabry-Perot laser, and the receiver section uses 1310nm/1490nm receiver accordingly. The 1000BASE-BX-D SFP operates at wavelengths of 1490nm TX/1310nm RX, and the 1000BASE-BX-U SFP operates at wavelengths of 1310nm TX/1490nm RX. These transceivers use standard simplex LC connectors for fiber cable connection and provide a long transmission distance of up to 10 km.

Key Features
  • Data rate up to 1.25 Gbps
  • Hot-pluggable SFP footprint
  • 1490 nm DFB Transmitter and 1310 nm PIN Receiver
  • 1310 nm FP Transmitter and 1490 nm PIN Receiver
  • Transmission distance up to 10 km
  • Simplex LC connector
  • Low power dissipation
  • Digital diagnostic monitor interface is compliant with SFF-8472
  • Compliant with SFP MSA Specification
  • Compliant with IEEE 802.3z Gigabit Standard
  • RoHS compliance
1000BASE-BX-D SFP

1000BASE-BX-D SFP supports link length of up to 10km point to point on single mode fiber (1490nm-TX/1310nm-RX wavelength) at 1Gbps bidirectional. This optic uses an LC connector. The picture below show a Cisco GLC-BX-D compatible 1000BASE-BX-D SFP 1490nm-TX/1310nm-RX transceiver. The GLC-BX-D is a small form factor pluggable module for Gigabit Ethernet 1000BASE-BX and Fiber Channel communications. The GLC-BX-D transceiver operates at 1490Tx/1310Rx wavelength. It is compatible with the IEEE 802.3ah 1000BASE-BX10-D standards. A 1000BASE-BX-D device is always connected to a 1000BASE-BX-U device with a single strand of standard SMF.

Cisco GLC-BX-D Compatible 1000BASE-BX-D SFP DOM Transceiver

1000BASE-BX-U SFP

1000BASE-BX-U SFP supports link length of up to 10km point to point on single mode fiber (1310nm-TX/1490nm-RX wavelength) at 1Gbps bidirectional. This optic uses an LC connector. The communication over a single strand of fiber is achieved by separating the transmission wavelength of the two devices. 1000BASE-BX-D transmits a 1490nm channel and receives a 1310nm signal, whereas 1000BASE-BX-U transmits at a 1310nm wavelength and receives a 1490nm signal. A wavelength-division multiplexing (WDM) splitter integrated into the SFP to split the 1310nm and 1490nm light paths. The GLC-BX-D and GLC-BX-U SFPs also support digital optical monitoring (DOM) functions according to the industry-standard SFF-8472 multisource agreement (MSA). This feature gives the end user the ability to monitor real-time parameters of the SFP, such as optical output power, optical input power, temperature and transceiver supply voltage. The picture below show a Cisco GLC-BX-U compatible 1000BASE-BX-U SFP 1310nm-TX/1490nm-RX transceiver.

Cisco GLC-BX-U Compatible 1000BASE-BX-U SFP DOM Transceiver

Applications
  • Gigabit Ethernet
  • Fiber Channel Links
  • Switch to switch interface
  • Switched backplane applications
  • Pouter/Server Interface
  • Other optical transmission systems
Conclusion

New organizational applications, virtualization, and data center consolidation trends are pushing your server I/O requirements to meet higher needs than before. With new BiDi optical technology, SFP BiDi transceivers make it much easier for you to upgrade your networks.

DOM — A Fiber Tester Inside Your SFPs

When reading parameters of an SFP transceiver, you may see words like “DOM”. Do you know what’s the meaning of “DOM”? And why should an SFP transceiver be with DOM? In this post, some detailed information about DOM will be given.

What Is DOM?

DOM, short for digital optical monitoring, is used to monitor some parameters of the transceiver in real-time, helping to identify the location of the fiber link failure, simplify maintenance, and improve system reliability. DOM allows you to monitor the TX (transmit) and RX (receive) power of the module, temperature, and transceiver supply voltage. You can configure your device to monitor optical transceivers in the system, either globally or by specified port. When this feature is enabled, the system monitors the temperature and signal power levels for the optical transceivers in the specified ports. Console messages and syslog messages are sent when optical operating conditions fall below or rise above the SFP manufacturer’s recommended thresholds. With DOM, network administrators can check and ensure that the module is functioning correctly in an easy and convenient way. This is why most of modern optical SFP transceivers support DOM functions. The following image shows a Brocade E1MG-SX-OM compatible 1000BASE-SX SFP DOM transceiver. With DOM function, it is able to assist network designers in detecting and digitizing parameter signals on circuit board inside the SFP module.

Brocade E1MG-SX-OM compatible 1000BASE-SX SFP DOM Transceiver

How to Use DOM?

To ensure the DOM capability function well, both the device and the platform must support the feature. When the transceiver module is DOM-enabled, a minimum software version may be required to support the feature in each platform. There are some restrictions of using DOM. Ensure that your optical transceiver supports DOM; specifies the time interval for monitoring optical transceivers; in case of combo ports with SFP and RJ45 provision, when SFP is inserted in slot or port and media type is not configured to SFP, DOM is functional only if global transceiver monitoring is enabled.

SFP Transceivers with DOM

With the popularity of DOM function, there are many SFP transceivers are with DOM, like 1000BASE-LX SFP DOM transceiver, 1000BASE-SX SFP DOM transceiver, 1000BASE-LX SFP DOM transceiver, 1000BASE-EX SFP DOM transceiver, and 1000BASE-ZX SFP DOM transceiver. And there are many third-party optical transceiver include the DOM functionality. What should be mentioned here is that although optical transceivers with DOM are much popular than those without DOM, some user still use the older optical transceivers in consideration of the upgrading costs.

Conclusion

SFP transceivers with DOM help to ensure that the business can be proactive in preventative maintenance of the network and ensure business continuity. And it would easy to explain why modern transceivers are with DOM. It is an irresistible development trend of industry and technology. Fiberstore is a professional optical transceiver manufacturer and supplier, which offers a with varity of compatible SFP transceivers with DOM functionality with a low cost. For example, Allied Telesis AT-SPSX compatible 1000BASE-SX SFP DOM transceiver costs only $6.00, and NETGEAR AGM732F compatible 1000BASE-LX SFP DOM transceiver costs only $7.00.

Introduction to 10/100/1000BASE-T SFP Module

The SFP transceiver modules are hot-pluggable I/O devices that plug into module sockets. The transceiver connects the electrical circuitry of the module with the optical or copper network. There are many choices of SFP modules. You may see an SFP module labeled as 10/100/1000BASE-T SFP. As we know, 1000BASE-T is a standard for Gigabit Ethernet over copper wiring. How about 10/100/1000BASE-T SFP module? What is a 10/100/1000BASE-T SFP module? In this post, a brief introduction about 10/100/1000BASE-T SFP module will be given.

Overview

The 10/100/1000BASE-T SFP small form-factor pluggable (SFP) transceiver is based on the SFP Multi Source Agreement (MSA). It is a copper SFP supporting 10/100/1000BASE-T copper Ethernet standards. It is compatible with the Gigabit Ethernet and 1000BASE-T standards as specified in IEEE 802.3z and 802.3ab. 10/100/1000BASE-T electrical SFP transceivers use an integrated RJ-45 connector with transformer and PHY IC. The link length is up to 100m over four pair Category 5 UTP cabling. With the hot pluggability, the module offers a flexible and easy way to be installed into SFP MSA compliant ports at any time without the interruption of the host equipments operating online. Besides, this 10/100/1000Mbps SFP transceiver operates at wide temperature ranges and provides high performance. It is ideal for full-duplex Gigabit Ethernet connectivity to high-end workstations and wiring closets utilizing existing copper network infrastructure. And it provides a convenient way to add a copper connection to an SFP type switch that would typically be used for fiber SFPs. Picture below shows a Juniper EX-SFP-1GE-T SFP copper transceiver. It is a 10/100/1000BASE-T copper SFP, which is compliant with the Gigabit Ethernet standard as specified in IEEE STD 802.3 and can fully satisfy the 10/100/1000BASE-T application.

Juniper EX-SFP-1GE-T Compatible 10.100.1000BASE-T SFP Copper RJ-45 100m Transceiver

Key Features
  • Compliant with SFP Multi-Source Agreements standards (MSA)
  • 10/100/1000 Mbps Auto-Negotiation
  • Up to 1.25Gbps bidirectional data links
  • Hot-pluggable SFP footprint
  • Fully metallic enclosure for low EMI
  • Low power dissipation
  • Compact RJ-45 connector assembly
  • Access to physical layer IC via 2-wire serial bus
  • 10/100/1000 BASE-T operation in host systems with SGMII interface
  • Link length up to 100m with four pair UTP cabling
Applications

10/100/1000BASE-T SFP modules are extremely versatile, working with many equipment that support the SFP type of interface: Ethernet switches, routers and any other networking equipment. They support 10/100/1000 Mbps data-rate in excess of 100 meters and are ideally suited for implementing small form-factor Network Interface Cards (NICs) and uplinks. As such, it is highly appropriate for use in such high-density applications as LAN 10/100/1000BASE-T Fiber Channel, Gigabit Ethernet LAN switch applications, Gigabit Ethernet media converters, switch-to-switch interfaces, switch to switch SerDes interface, switch to switch SGMII interface, switched backplanes, gaming devices, router/server interfaces and other optical transmission systems.

Conclusion

Fiberstore offers a wide variety of SFP modules (T, TX, SX, LX, ZX, CWDM, DWDM and BiDi) to meet your requirements, for example, Meraki MA-SFP-1GB-TX compatible 1000BASE-TX SFP copper transceiver, and HP JD089B compatible 1000BASE-T SFP copper transceiver. Our SFP modules have been tested and guaranteed 100% compatible with various Ethernet switches from major manufacturers like Cisco, HP, Nortel, Extreme, or Netgear. Fiberstore optics are thoroughly tested and are subject to an extensive qualification process before being considered certified to work in modules and switches.

SFP Transceivers for Gigabit Ethernet Applications

SFP, small form-factor pluggable, a hot-swappable input/output device plugs into a Gigabit Ethernet port or slot. It is a popular industry format jointly developed and supported by many network component vendors. SFP transceivers have a wide variety of transmitter and receiver types, which allows users to select the appropriate transceiver for their link needs. Several different categories of SFP modules will be introduced in this article.

1000BASE-SX SFP for Multimode Fibers

The 1000BASE-SX SFP, compatible with the IEEE 802.3z 1000BASE-SX standard and SFP Multi-Source Agreement (MSA) standards, is a cost effective transceiver module with a wavelength of 850nm which supports data rates of up to 1.25 Gbps. It operates on 50/125μm multimode fiber links up to 550m and on 62.5/125μm multimode fiber links up to 300m. It also can support up to 1km over laser-optimized 50μm multimode fiber cable. Its electrical interface is compliant with SFF-8431. And it supports Digital Diagnostic Monitoring (DDM). The following is a picture of TRENDnet TEG-MGBSX compatible 1000BASE-SX SFP transceiver.

TRENDnet TEG-MGBSX Compatible 1000BASE-SX Transceiver

1000BASE-LX/LH SFP for Both Multimode and Singlemode Fibers

The 1000BASE-LX/LH SFP, compatible with the IEEE 802.3z 1000BASE-LX standard, is similar with the other SFP transceivers in basic working principle and size. 1000BASE-LX/LH SFP can be used for both single-mode and multi-mode. It is single-mode by design, but when it gets together with its friend “mode conditioning patch cable”, it can also be used for multi-mode application. It operates on standard singlemode fiber optic link spans of up to 10km and up to 550m on multimode fibers. 1000BASE-LX/LH SFP transceiver is a high performance 1310nm transceiver for singlemode fibers. It supports dual data-rate of 1.25 Gbps/1.0625 Gbps. 1000BASE-LX/LH SFP transceiver is commonly applied for Gigabit Ethernet links, Fiber Channel Switch Infrastructure and other optical transmission systems. The following picture shows a Cisco SFP-GE-L compatible 1000BASE-LX/LH SFP transceiver module.

Cisco SFP-GE-L Compatible 1000BASE-LXLH SFP Transceiver

1000BASE-EX SFP for Long-Reach Singlemode Fibers

The 1000BASE-EX SFP operates on standard single-mode fiber-optic link spans of up to 40 km in length. An inline optical attenuator should be inserted between the fiber optic cable and the receiving port on the SFP at each end of the link for back-to-back connectivity.

1000BASE-ZX SFP for Long-Reach Single-Mode Fibers

1000BASE-ZX SFP supports link length of up to 80km on single mode fiber at 1Gbps. The precise link span length depends on multiple factors such as fiber quality, number of splices, and connectors. This optic works at 1550nm wavelength and uses an LC connector.

1000BASE-T SFP for Copper Networks

1000Base-T is an extension of standard Ethernet technologies to gigabit-level network speeds. 1000BASE-T SFP operates on four pairs of the commonly installed category 5 unshielded twisted pair (UTP) cable or enhanced category 5 cabling version of UTP cabling of link lengths up to 100m. The following picture shows an HP JD089B compatible 1000BASE-T SFP transceiver.

HP JD089B Compatible 1000BASE-T SFP Copper RJ-45 100m Transceiver

Summary

SFP transceivers are designed to support SONET, gigabit Ethernet, Fibre Channel, and other communications standards. Each optical interface operates and is managed like a fixed port but gives the customer flexibility to hot-swap or interchange to different optical module types. There is a number of 1000 BASE SFP optics from Fiberstore that are available depending on the customer application and distance capability required. Each optical interface operates and is managed like a fixed port but gives the customer flexibility to hotswap or interchange to different optical module types. Fiberstore optics are thoroughly tested and are subject to an extensive qualification process.

The Basics of HP SFP Transceivers

SFP, small form-factor pluggable, is a specification for a new generation of optical modular transceivers. It is a compact, hot-pluggable transceiver used for both telecommunication and data communications applications. SFP is a popular industry format jointly developed and supported by many network component vendors. HP, as a leading provider of optical network equipment, provides various SFP transceiver choices for your Gigabit Ethernet applications. This article gives you some fundamental information about HP 1000BASE SFP transceivers.

HP SFP

HP SFP is a Multi-Source Agreement (MSA) standard for high speed application. The devices are designed for use with small form factor (SFF) connectors, and offer high speed and physical compactness. HP SFP transceivers are electrically hot-pluggable, which enables them to be easily interchanged, so electro-optical or fiber optic networks can be upgraded and maintained more conveniently than has been the case with traditional soldered-in modules. Rather than replacing an entire circuit board containing several soldered-in modules, a single module can be removed and replaced for repair or upgrading. This can result in a substantial cost savings, both in maintenance and in upgrading efforts. All HP SFP transceivers are well tested on HP switch to ensure optimal signal integrity and the best end-to-end performance.

Types of HP SFP Transceivers

There is a number of HP 1000BASE SFP optics that are available depending on the customer application and distance capability required. Each optical interface operates and is managed like a fixed port but gives the customer flexibility to hotswap or interchange to different optical module types. In this part, two different kinds of HP SFP transceivers will be introduced.

HP 1000BASE-LX SFP: HP 1000BASE-LX SFP transceiver, like HP J4859C, is specified to work over a distance of up to 10km over single mode fiber and it can also run over all common types of multi mode fiber with a maximum segment length of 550m. For link distances greater than 300m, you must install a mode-conditioning patch cord between the transceiver and the MMF cable on both ends of the link. HP J4859C SFP transceiver, as shown below, provides a full-duplex gigabit solution up to 10 km (singlemode) or 550 m (multimode).

HP J4859C Compatible 1000BASE-LX SFP Transceiver

HP 1000BASE-SX SFP: HP 1000BASE-SX SFP transceiver, like HP JD118B, is compatible with the IEEE 802.3z standard and operates multi-mode fibers link up to 550 m. HP 1000BASE-SX SFP transceiver module consists of three sections: a VCSEL laser transmitter, a PIN photodiode integrated with a trans-impedance preamplifier (TIA) and MCU control unit. It is often applied for Fibre Channel links, Gigabit Ethernet links, Fast Ethernet links, etc. HP JD118B SFP transceiver, as shown below, is a cost effective transceiver module with a wavelength of 850 nm which supports data rates of up to 1.25 Gbps.

HP JD118B Compatible 1000BASE-SX SFP Transceiver

Applications of HP SFP

HP SFP Transceivers are designed to support SONET, gigabit Ethernet, Fibre Channel, and other communications standards. Storage interface cards, also called HBAs or Fibre Channel storage switches, also make use of these modules, supporting different speeds such as 2Gb, 4Gb, and 8Gb. Because of their low cost, low profile, and ability to provide a connection to different types of optical fiber, SFP provides such equipment with enhanced flexibility.

Conclusion

Fiberstore is a professional manufacturer and supplier for optical fiber products and provides various kinds of SFP transceivers. We offers a large amount of compatible SFP transceivers branded by many famous companies, like Cisco, HP, Juniper, and Brocade. All these fiber transceivers are 100% compatible with major brands like Cisco, HP, Juniper, Nortel, Force10, D-link, 3Com, etc. Moreover, these 1000BASE SFP transceivers are with high quality and backed by a lifetime warranty.

Introduction to 1000BASE-LX/LH SFP Transceiver

There are many types of transceivers to support different types of fiber connections. Which transceiver is the right one for your application? The answer largely depends on how far your connections need to travel. When looking at transceiver model numbers, you’ll see one of the following: T, SX, LX, LX/LH/LR/LR+, CX4, ER/ER+, or ZX. Each transceiver has different compatibility of fiber and copper mode types. Among them, 1000BASE-LX/LH SFP is one popular optical transceiver type in optical transmission systems. And this article will talk about it.

What Is 1000BASE-LX/LH?

1000base-lx lh1000BASE-LX10 was standardized six years after the initial gigabit fiber versions as part of the Ethernet in the First Mile task group. It is very similar to 1000BASE-LX, but achieves longer distances up to 10 km over a pair of single-mode fiber due to higher quality optics. 1000BASE-LX is specified to work over a distance of up to 5 km over 10 µm single-mode fiber, and all common types of multi-mode fiber with a maximum segment length of 550 m. 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. Thus, we often see 1000BASE-LX/LH rather than 1000BASE-LX10. LX/LH stands for “long wavelength/long haul”. Unlike the SX, MMF will only be able to span 550m regardless of the cable’s core size. SMF is able to travel up to 10km but runs around 5km are typical using standard single-mode patches. LX is often used when networking a campus and LH can be used for runs across town to the local Internet service provider (ISP). LH purely uses SMF. If you are laying shorter spans of SMF, you should consider using in-line attenuators.

1000BASE-LX/LH SFP Transceiver Module

1000BASE-LX/LH SFP transceiver module is similar with the other SFP transceivers in basic working principle and size. The transceiver consists of three sections: a FP laser transmitter, a PIN photodiode integrated with a trans-impedance preamplifier (TIA) and MCU control unit. As we know, fiber comes in two modes, multi-mode fiber (MMF) and single-mode fiber (SMF). An optical transceiver module is generally either made for single-mode (long distance) or multi-mode (short distance). But 1000BASE-LX/LH SFP can be used for both single-mode and multi-mode. 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. 1000BASE-LX/LH SFP transceiver is commonly applied for Gigabit Ethernet links, Fiber Channel Switch Infrastructure and other optical transmission systems. The following picture shows a 1000BASE-LX/LH SFP transceiver module.

Cisco GLC-LH-SM Compatible 1000BASE-LXLH SFP

In a word, 1000BASE-LX/LH SFP has two identities. It is single-mode by design, but when it gets together with its friend “mode conditioning patch cable”, it can also be used for multi-mode application. This patch cable inserts a single to multi-splice on the transmit path, to “fill” the multi-mode fiber with light. It is more expensive than normal patch cables, but is necessary if using these on multi-mode fiber. At present, 1000BASE-LX/LH SFP is the only one kind of fiber optic transceivers which can be used for both single-mode and multi-mode applications. And these applications are depending on what fiber you use.

Fiberstore offers a large amount of in-stock 1000BASE-LX/LH SFP transceivers and 1000BASE-LX SFP transceivers which are compatible for Cisco, Juniper, Dell, Finisar, Brocade, or Netgear in various options. For example, Cisco GLC-LH-SM 1000BASE-LX/LH SFP transceivers are high performance and cost-effective modules supporting dual data-rate of 1.25Gbps/1.0625Gbps and 10km transmission distance with SMF; and Juniper EX-SFP-1GE-LX 1000BASE-LX SFP is fully compatible with Juniper devices.

Things to Know About 10GBASE-LRM

As 10 Gigabit Ethernet broadly rolls out and increasing numbers of enterprises begin the process of evaluating network upgrades, numerous physical-layer interconnects are available to address 10Gbit/s data transmission. These include 10GBASE-LX4, CX4, SR, LR, and ER, as well as emerging 10GBASE-T (802.3an), 10GBASE-KX4 (802.3ap), and 10GBASE-LRM (802.3aq). With all of these options, it can be a difficult process to sort through the requirements of a specific implementation. In this article, 10GBASE-LRM standard, one option that meet existing installed multi-mode fiber cabling plant in building backbone, switch-to-switch, data center, and other enterprise-related environments, will be introduced.

What Is 10GBASE-LRM?

Multi-mode fiber dominates the installed base of fiber plant for data communications. Older multi-mode fibers installed in the early 1990s exhibit large amounts of modal dispersion, making for a challenging transmission channel, particularly at 10G data rates. For vertical-riser applications in building backbones, transmission distances of up to 300 m are required, and pulling new fiber is not a cost-effective option. The requirements of the vertical-riser application must be addressed to make 10G optical deployment a viable alternative in the enterprise backbone. The current standards-based design for the vertical-riser link is known as 10GBASE-LX4. LX4 uses a CWDM approach using four wavelength-specific transmitters near 1300 nm, a CWDM multiplexer and demultiplexer, and four receivers. The disadvantages of this architecture are significant challenges in cost, size reduction, and manufacturability. As a result of these disadvantages, vendors have developed an alternative approach called 10GBASE-LRM. LRM stands for long reach multi-mode. 10GBASE-LRM, as the replacement to LX4, will reach up to 220m over standard multi-mode fiber, but without the complexity of the LX4 optics. The following is a picture of 10GBASE-LRM transceiver modules.

Compatible 10GBASE-LRM SFP+ Transceivers

How Does 10GBASE-LRM Work?

LRM uses a 10G serial approach with a single 1310nm transmitter and a receiver with an adaptive electronic equalizer IC (integrated circuit) in the receive chain. This adaptive equalization technology, known as electronic dispersion compensation (EDC), working on a way to provide a long-distance multi-mode solution that operates with a single wavelength, is used to compensate for the differential modal dispersion (DMD) present in legacy fiber channels. EDC is a form of signal processing that removes interference from the received optical signal and recovers an open “eye” from a closed eye. The EDC function is one that can be integrated into the serializer, and perhaps even done in complementary metal-oxide-semiconductor transistor (CMOS) over time, which suggests that it can achieve a very low cost and fit into very small form factors. 10GBASE-LRM can provide a long distance solution based on multi-mode fiber and operates with a single wavelength.

10GBASE-LRM Transceiver Modules

LRM modules use a single higher-speed laser operating at 10.310Gbit/s rather than 3.125Gbit/s. This creates a simpler optical path, but requires more expensive components. The LRM laser can either be a distributed-feedback (DFB) laser, a vertical-cavity surface-emitting laser (VCSEL), or a Fabry-Perot (FP) laser. Both DFBs and VCSELs provide a very clean, single-wavelength output, which minimizes signal degradation due to spectral effects. On the other hand, an FP laser source produces a range of different wavelengths. Each of these wavelengths travels through the fiber at slightly different speeds, creating additional jitter that must be recovered by the EDC circuit at the receiver. While small, this added jitter could compromise operation on some fibers.

The EDC chips used in the LRM modules are also very complex and require a highly linear transimpedance amplifier (TIA) and a high-speed photodiode with a large surface area capable of capturing all of the optical modes at the output of a fiber. Thus, LRM offers the advantage of fewer components, yet the increased performance requirements for each individual element may be a substantial barrier to the overall module cost savings speculated by LRM advocates.

Fiberstore offers you a compatible 10GBASE-LRM transceiver solution at a fraction of the original cost and a 5-year warranty. These products are manufactured per precise OEM specifications and with high quality. For example, SFP+ transceiver JD093B branded by HP, and SFP+ transceiver EX-SFP-10GE-LRM branded by Juniper, all these 10GBASE-LRM transceivers are with high quality to meet your 10 Gigabit fiber cabling needs.

Introduction to 1000BASE-SX

The 1000BASE designation is an IEEE shorthand identifier. The “1000” in the media type designation refers to the transmission speed of 1000 Mbps. The “BASE” refers to baseband signaling, which means that only Ethernet signals are carried on the medium. There are many types of wiring for Gigabit Ethernet, such as 1000BASE-SX, 1000BASE-LX, 1000BASE-CX, 1000BASE-ZX and 1000BASE-T. In this post, a brief introduction to 1000BASE-SX will be provided.

1000BASE-SX Definition

1000BASE-SX is a physical layer specification for Gigabit Ethernet over fiber optic cabling as defined in 802.3z. 1000BASE-SX Gigabit Ethernet is a variant coupled to a VCSEL laser with a short wavelength of 850 nm. It is a type of standard for implementing Gigabit Ethernet networks. The letter “S” stands for short wavelength, and the letter “X” for local area networks (LAN) and an 8B/10B encoding. The SX in 1000BASE-SX indicates that this version of Gigabit Ethernet is intended for use with short-wavelength transmissions over short cable runs of fiber optic cabling. 1000BASE-SX technologies are being widely implemented in enterprise-level networks and are primarily used between pieces of equipment within a building.

How 1000BASE-SX Works

1000BASE-SX is an extension of standard Ethernet technologies to gigabit-level network speeds. It is implemented using only multi-mode fiber optic cabling. The 850nm laser are depending on the glass fiber diameter and OM class of multi-mode fibers in practice distances of 270m (OM1), 550m (OM2) and 800m (OM3) achieved. At these distances it should be noted that it is a full-duplex and point-to-point connection, with two separate multi-mode fibers. Cable segment lengths depend on the cable grade used. 1000BASE-SX is intended mainly for connecting high-speed hubs, Ethernet switches, and routers together in different wiring closets or buildings using long cabling runs, and most commonly implemented in a switch-switch configuration. The 1000BASE-SX standard was developed to support lower cost multi-mode fiber runs in horizontal and shorter-length backbone applications.

1000BASE-SX SFP Transceiver

1000BASE-SX SFP transceiver is a cost effective transceiver module with a wavelength of 850 nm which supports dual data-rate of 1.25 Gbps/1.0625 Gbps. It is compatible with the IEEE 802.3z standard and operates multi-mode fibers link up to 550 m. This transceiver module consists of three sections: a VCSEL laser transmitter, a PIN photodiode integrated with a trans-impedance preamplifier (TIA) and MCU control unit. It is often applied for Fibre Channel links, Gigabit Ethernet links, Fast Ethernet links, etc. 1000BASE-SX SFP transceivers are available with a variety of transmitter and receiver types, allowing users to select the appropriate one for each link to provide the required optical reach, depending on the customer application and distance capability required. Each optical interface operates and is managed like a fixed port but gives the customer flexibility to hot-swap or interchange to different optical module types. The following is a picture of 1000BASE-SX SFP transceiver.

Fiberstore is a professional manufacturer and supplier for optical fiber products and provides various kinds of 1000BASE-SX SFP transceivers branded by many famous companies. For example, HP J4858C and JD118B branded by HP, AA1419048-E6 branded by Avaya, FTRJ-8519-7D branded by Finisar, and QFX-SFP-1GE-SX branded by Juniper, all these 1000BASE-SX SFP transceivers are with high quality and backed by a lifetime warranty.