Great Compatible Cisco 10G SFP+ Modules

The enhanced small form-factor pluggable (SFP+) is an enhanced version of the SFP that supports data rates up to 16 Gbit/s. Since SFP+ is mostly used for 10G, we usually call it 10G SFP. It is a popular industry format supported by many network component vendors. In terms of the SFP+ transceivers, there are various major brands, such as Cisco, HP, Juniper etc. In the current market, the Cisco's SFP+ transceivers are very popular with the customers, especially the Cisco SFP-10G-SR and SFP-10G-LR. However, these original transceiver modules are really expensive. To save cost, we usually use 3rd-party transceiver modules instead of the original brand. In this text, two kinds of compatible SFP+ modules that can severally replace the Cisco SFP-10G-SR and SFP-10G-LR will be introduced. These two kinds of compatible modules are all from the Fiberstore, the leading manufacturer and supplier of optical transceiver modules in China.

SFP+ is the Most Popular 10G Transceiver Module

Since there are many different 10GbE physical layer standards, many interfaces consist of a standard socket into which different PHY modules may be plugged. On the market, the common 10G transceiver modules are XENPAK, XPAK, X2, XFP and SFP+. XENPAK was the first MSA for 10GbE and had the largest form factor. X2 and XPAK were later competing standards with smaller form factors. XFP came after X2 and XPAK and it is also smaller. The newest module standard is SFP+. In comparison to earlier XENPAK or XFP modules, SFP+ modules leave more circuitry to be implemented on the host board instead of inside the module. Now SFP+ has become the most popular socket on 10GbE systems.

Common 10GbE Standards for SFP+

10 Gigabit Ethernet is a group of computer networking technologies for transmitting Ethernet frames at a rate of 10 gigabits per second. It was first defined by the IEEE 802.3ae-2002 standard. Some common 10GbE standards for SFP+ are shown in the table below:

Cisco compatible SFP+	Cable Type	Wavelength	Max Range
10GBASE-SR SFP	MMF	850nm	OM3:300m/OM4:400m
10GBASE-LR SFP	SMF	1310nm	10km
10GBASE-LRM SFP	MMF	1310nm	220m
10GBASE-ER SFP	SMF	1550nm	40km
10GBASE-ZR SFP	SMF	1550nm	80km

Two Kinds of Compatible Cisco SFP+ Transceivers from Fiberstore

For 3rd-party transceiver modules are much cheaper than the original brand (Cisco. HP, etc), they are become more and more popular in the market. As a result, suppliers to offer these effective modules are also become more than before. But in my opinion, the Fiberstore does the best among them. They provide all kinds of compatible transceivers, especially the SFP-10G85-3M-CO and SFP-10G31-10-CO, which can entirely replace the Cisco SFP-10G-SR and SFP-10G-LR.

• SFP-10G85-3M-CO

  The SFP-10G85-3M-CO series multi-mode transceiver is a SFP+ module for duplex optical data communications such as 10GBASE-SR and 10GBASE-SW. This transceiver offers the same function with Cisco SFP-10G-SR and is fully compatible with Cisco devices. It is a hot-swappable input/output device, which means no need to power down if installing or replacing. Its transmission distance can up to 300m with duplex LC multi-mode Fiber cable.

• SFP-10G31-10-CO

  The SFP-10G31-10-CO single mode transceiver is a small form factor pluggable module for serial optical data communications such as IEEE 802.3ae 10GBASE-LR/LW. This transceiver offers the same function with Cisco SFP-10G-LR and is fully compatible with Cisco devices. This module is designed for single mode fiber and operates at a nominal wavelength of 1310 nm. Its transmission distance can up to 10km with duplex LC single-mode fiber.

All these products offered by Fiberstore are tested in-house prior to shipping to ensure that they will arrive in perfect physical and working condition. Fiberstore can guarantee these 10G SFP+ transceivers to work in your system and all of their 10G SFP+ transceivers come with a lifetime advance replacement warranty. Now they have many SFP-10G85-3M-CO and SFP-10G31-10-CO transceiver modules in stock. Therefore, Same-Day Delivery is available. If you want to know more about their products or services, please feel free to contact them at sales@fiberstore.com.

Originally published at: www.cables-solutions.com

Do you really know “1000BASE-LX/LH SFP”?

1000BASE-LX/LH SFP, one of the commonly used fiber optic transceivers, is now widely used in optical transmission systems. With the development of 40/100G Ethernet, even 400G Ethernet, this kind of transceiver module is nothing new to the module users. However, few people can deliver a clear answer to the question of what "1000BASE-LX/LH" infers. Well, if you know what it means, congratulations! you are the one of the few. You can skip today's contents or share your experience to us in the comment. Actually, this post is a simple reference source for the beginners in this field or those who are lack of knowledge with fiber optic transceiver but have a strong interest in it.

To begin with, I'd like to make a brief introduction of 1000BASE-LX/LH SFP transceiver. This kind of SFP is similar with the other SFPs in basic working principle and size. But it is compatible with the IEEE 802.3z 1000BASE-LX standard, operating 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.

As we know, an optical transceiver module is generally either made for single mode (long distance) or multimode (short distance). But 1000BASE-LX/LH SFP can be used for both singlemode and multimode. In fact, the Ethernet standard defines this optical interface specification as 1000BASE-LX10. However, many vendors as a proprietary extension called either 1000BASE-LX/LH or 1000BASE-LH before it was standardized. Thus, we often see 1000BASE-LX/LH rather than 1000BASE-LX10.

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 multimode application. This patch cable inserts a single to multi splice on the transmit path, to "fill" the multimode fiber with light. It is more expensive than normal patch cables, but is necessary if using these on multimode fiber. At present, 1000BASE-LX/LH SFP is the only one kind of fiber optic transceivers which can be used for both singlemode and multimode applications. And these applications are depending on what fiber you use.

Originally published at: www.fiber-optic-transceiver-module.com/do-you-really-know-1000base-lxlh-sfp.html

Fiber Transceiver: How Much Do You Know about Hot-swappable

At present, almost most of the fiber transceivers are with "hot-swappable", or also called "hot-pluggable" functions (the following contents consistently use hot-swappable) in the optics market. However, there are few articles written for hot-swappable optical transceiver, because people generally consider it just a function that will help us save money or make our work more convenient and there is unnessary to know much about it. How about you? Are you really not interested in it or just because you don't have the resource to learn it? Here is an opportunity for you to learn much about the hot-swappable optical transceiver module, mainly the "hot-swappable" in this paper.

What's "Hot-swappable" Optical Transceiver?

Hot-swappable optical transceiver, is a device with a function that can support inserting or pulling out the module without shutting down the system or without significant interruption to the system and significant interruption to the operation of the system. This function can help us to avoid complete redesigns and cutdown the exorbitant costs associated with the practice, e.g. system updating. Now, optical transceivers, such as GBIC, SFP (Small Form Pluggable), SFP+ (Small Form Pluggable Plus), 40G QSFP etc. are all hot-swappable. The following figure shows Juniper Hot-pluggable 1000BASE-SX SFP - EX-SFP-1GE-SX:

Why "Hot-swappable" is So Important to Optical Transceiver?

As we know, optical transceiver module is an important part in optical transmission system. For each management or upgrade, we should power down the device until we finish the pluggable process, if we used a "non-hot-swappable" optical transceiver. However, because of the importance of telecommunications and data transmission systems, if power cuts carry on a long time, there will be a great loss. Additionally, the restart time of some operation systems is long which also leads a big loss. This is why it is so important to find devices that are hot-swappable. Nowadays, the hot-swappable technology is widely used in data communication and transmission industry and becomes more and more important.

Key Technologies of "Hot-swappable" Function

When people wanted to add the "hot-swappable" function to the optical transceiver modules, a cascade of problems must be solved to ensure the device work well. First, the we should guarantee the safety of the laser. As we know, laser is the most important and expensive part of an optical transceiver module. It is easy to be damaged and vulnerable to static electricity damage as it is a static sensitive component. In addition, we should also consider the surge current and system bus to avoid damaging the components of optical transceiver and causing interference to data transmission.

To solve these problems, people use some of the technologies to ensure safty and feasibility of hot-swappable optical transceiver modules. MSA (Multisource Agreement) defines using the TX_fault (Transmitter fault) to indicate whether the optical transceiver module works in good condition. When we inserted an optical transceiver, there is a initializing program. And the optical transceiver begin to test by itself after the power on. If the self test is approved, it will dirve the IC (integrated circuit) to offer the current to the laser, and then laser work. Otherwise, it will not offer current to the laser. In addition, adding a shutdown pin to the circuit that can close the LD (laser diode) when failure occurs is also a solution to ensure the saftey of laser.

Meanwhile, to reduce the surge current, we can use a specific sequence of power on. Moreover, we can also add a filter circuit as well as current limit switch to further reduce the surge current. Furthermore, in order to reduce the interference of hot-swappable module on the system bus, we usually employ connect pullup resistors and precharge technologies. These are also defined by MSA.

Ensure They are Hot-Swappable When You Buy Optical Transceiver

After reading the above contents, you will understand more about the "hot-swappable" function of optical transceiver and know how it is so important. This is why "hot-swappable" optical transceiver was so popular with users. We can never underestimate the power of optical transceiver modules that are hot-swappable. They can reduce expenditures for companies, especially when devices fail prematurely because they do not have to completely shut down the system to replace the device. When devices have more flexibility and functionality, companies save money and time. In a word, to ensure the optical transceiver module is hot-swappable when you decide to buy it.

Originally published at www.fiber-optic-transceiver-module.com.

FAQs of Gigabit Ethernet Transceivers and Cables

Fiberstore is a professional OEM manufacturer and supplier of SFP and SFP+ modules. These SFP and SFP+ transceivers and cables are 100% compatible with major brands. According to your requirements, Fiberstore welcome any inquiry for customized SFP modules. This paper is going to introduce Fiberstore's Gigabit Ethernet Transceivers and Cables Frequently Asked Questions.

What is the distance supported by the SFP+ SR transceiver?

The supported distance is up to 300 meters depending on the quality of the multimode fiber (MMF) you use. Quality of SFP+ SR transceiver MMF is listed as OM1 (up to 33 meters), OM2 (up to 8 2 meters), OM3 (up to 300 meters), and OM4 (up to 400 meters). Check with the supplier for the cable distance supported.

Do the SFP+ optical transceivers support 1 GbE operation?

Yes, they support 1G b E and 10 G b E dual rates and can be configured for 1 GbE.

What is Gigabit Ethernet Auto-Negotiation?

The IEEE standard for auto-negotiation ensures easy migration from 10 Mbps to 100 Mbps and 1000 Mbps speeds. The Auto-Negotiation standard allows devices based on several Ethernet standards, from 10BaseT to 1000BaseT, to coexist in the network by mitigating the risks of network disruption arising from incompatible technologies. This capability helps ensure a smooth migration path from Ethernet to Fast Ethernet and Gigabit Ethernet. Related product: 10/100/1000BASE-T Ethernet SFP.

Will the SFP+ optical transceivers auto - negotiate between 1 GbE and 10GbE?

Auto - negotiation is not supported between the 10 GE and 1 GE speed. The transceiver must be manually configured to operate at 1 GE speed.

What are the Cisco Compatible QSFP and SFP+ copper cables provided by Fiberstore?

SFP+ copper cables
SFP-H10GB-CU1M	Cisco compatible 10GBASE-CU SFP+ Twinax copper cable 1 meter passive 30AWG
SFP-H10GB-CU1-5M	Cisco compatible 10GBASE-CU SFP+ Twinax copper cable 1.5 meter passive 30AWG
SFP-H10GB-CU2M	Cisco compatible 10GBASE-CU SFP+ Twinax copper cable 2 meter passive 30AWG
SFP-H10GB-CU3M	Cisco compatible 10GBASE-CU SFP+ Twinax copper cable 3 meter passive 30AWG
SFP-H10GB-CU5M	Cisco compatible 10GBASE-CU SFP+ Twinax copper cable 5 meter passive 24AWG
QSFP+ to QSFP+ copper cables
QSFP-H40G-CU1M	Cisco compatible 40GBASE-CR4 QSFP+ passive copper cable 1 meter
QSFP-H40G-CU3M	Cisco compatible 40GBASE-CR4 QSFP+ passive copper cable 3 meter
QSFP-H40G-CU5M	Cisco compatible 40GBASE-CR4 QSFP+ passive copper cable 5 meter
QSFP to 4SFP+ copper cables
QSFP-4SFP10G-CU1M	Cisco compatible 40GBASE-CR4 QSFP+ to 4SFP+ passive copper cable 1 meter
QSFP-4SFP10G-CU3M	Cisco compatible 40GBASE-CR4 QSFP+ to 4SFP+ passive copper cable 3 meter
QSFP-4SFP10G-CU5M	Cisco compatible 40GBASE-CR4 QSFP+ to 4SFP+ passive copper cable 5 meter

Does the Twinax copper cable plug directly into the NIC and the switch?

Yes, the copper cable has an SFP+ or QSFP connector on both ends of the cable that directly plugs into the corresponding ports of the switch and NIC.

Should I use optical transceivers with the SFP+ and QSFP direct - attach Twinax copper cables?

No. These are direct - attach Twinax cables and come with connectors that plug directly into the SFP+ port or the QSFP port of the switch/NIC on either end. Transceiver cannot be used.

What is the advantage of SFP+ Twinax copper cable?

It is a low - cost option for shorter distances up to 5 meters.

Do Fiberstore's SFP+ direct attached Twinax copper cables work with Cisco switches?

Yes, Fiberstore offers SFP+ twinax copper cables and SFP+ active optical cables with 100% compatibility for Cisco. All of these SFP+ direct attach cables can meet the ever growing need to cost-effectively deliver more bandwidth, and they can be customized in different length to meet customers' requirements.

What is the advantage of SFP+ Twinax copper cable?

It is a low - cost option for shorter distances up to 5 meters.

Is 10GBase - T same as 10GBASE - T?

Yes. 1GBase - T is shorthand for 1000BASE - T and 10GBase - T is same as 10GBASE - T; they are the twisted pair implementations of 1 GbE and 10 GbE respectively

What are the distances supported by cables to use with the 10GBase - T ports?

Data center s ha ve a large installed base of Cat 5/6/7 twisted pair cables for the last 10+ years - initially for 1000BASE - T and now for use with 1/10GBase - T infrastructure. Distances supported at 10 Gbps speed:

• CAT 6A and CAT 7 cables supporting 100 meters
• CAT 5e and CAT 6 cables supporting 55 meters

How do I use the SFP+ ports for 1000BASE - T?

You need to purchase SFP+ to 1000BASE - T adapter ( SFP+/ Copper RJ45 ).

Fiberstore 100G CFP and CFP2 Module Solution

Next Generation 100G CFP Modules - CFP2 & CFP4

As 100-Gbps transmission is reaching the field, work is already underway on the second generation of the technology. Upcoming advances will lower costs, increase efficiency, and make 100G applicable to a wider variety of carrier and data center applications. But similar to what has happened in the 10G market, we expect that a different set of optical components will dominate the second and third generation of coherent 100G deployments, where power dissipation, density, and cost are key. Among these optical components, the small form factor pluggable transceiver which supports 100G is one of the essential part, because fiber connectivity in higher-speed active equipment is being condensed and simplified with plug-and-play, hot-swap transceiver miniaturization. And when it comes to providing 100G coherent functionality in a pluggable form factor, CFP and its next generation modules (e.g. 100GBASE-LR4 CFP2) will come to be discussed.

100GBASE-LR4 CFP2 Transceiver

The CFP Multi-Source Agreement (MSA) is currently defining two next generation 100G form factors - CFP2 and CFP4. Compared to the existing CFP form factor, CFP2 and CFP4 will respectively double and quadruple front panel port density. The new form factors take advantage of advances in optics and IC integration, and increase in electrical I/O rate from 10G to 25G. They will support existing and future duplex single-mode fiber (SMF) and parallel multi-mode fiber (MMF) interfaces. The following picture shows the evolution of 100G transceiver modules during 2010 - 2015. Through increasing in front panel density, the next generation of CFP modules will be with a smaller module size and lower power. This is enabled by increased integration of optics and ICs, and by increase in electrical I/O rate from 10G to 25G reducing the I/O width from 10 lanes to 4. In fact, this motivation of immediately taking advantage of advances in integration and I/O technology is similar with the 10G modules.

Evolution of 100G CFP during 2010-2015

CFP2 and CFP4 modules are defined to support existing and future SMF applications. The primary application is 100GE-LR4 10km duplex SMF, with CAUI-4 electrical I/O to be defined in. CFP2 will support 100GE-ER4 40km and 100G DWDM optics when integration technology matures. CFP2 and CFP4 can also support the future 100G structured data center 1000m duplex SMF application. In addition, CFP and CFP2 modules support 100GE-SR10 parallel MMF with CAUI interface. CFP2 and CFP4 modules can also support 100GE-SR10 with CAUI-4 electrical I/O by using a 4:10 Gearbox IC. In fact, an extension of the 100GE-SR10 application is break out of the parallel MMF cable into ten duplex MMF fiber pairs to enable high 10GE-SR front panel density. 10x10G electrical I/O can directly support this functionality. However, CAUI-4 electrical I/O does not support this because it breaks up 10GE lanes into 5G Virtual Lanes. To preserve 10GE lanes, the Optical Internetworking Forum (OIF) is defining a Multi Link Gearbox (MLG) standard which will support 10:4 multiplexing and 4:10 de-multiplexing of ten 10GE asynchronous streams across a 4x25G electrical I/O interface. We can see the differences between CFP, CFP2 and CFP4 in the following picture.

Comparison of CFP, CFP2 and CPF4

Fiberstore Launched the 100G CFP and CFP2 LR4

CFP is widely available in the market, especially with the development of 100G Ethernet in recent years. Fiberstore, the leading manufacturer and supplier of optical communication products, strives to offering the best solution for their customers. Except offering the 100G CFP LR4, they recently announced that they will launch the 100G CFP2 LR4 with high quality and a competitive price. Additionally, it is said that, this CFP2 product can be designed to be compatible with many major brands.

Order Information

Model	Unit Price	Wavelength (nm)	Transmission Distance	Fiber Type	Connector Type	Temp. Range
100GBASE-LR4 CFP	$ 7,000.00	850nm	100m(OM3)	MMF	MPO/MTP	0~70
100GBASE-SR10 CFP	$ 1,492.00	Ten lanes 840 to 860	100m(OM3) 150m(OM4)	MMF	MPO/MTP	0~70
100GBASE-LR4 CFP2	$ 8,000.00	Four lanes: 1295.6, 1300.1, 1304.6, 1309.1	10km	SMF	LC	0~70

For more information, please contact Fiberstore Team over sales@fiberstore.com or visit: www.fiberstore.com/c/100g-transceiver_1159.

Phone Line Tester Overview

Description of Phone Line Tester

Phone line tester is a pockets-sized device used for basic troubleshooting of analog phone systems as well as the line polarity. It monitors phone lines for digital-tone quality and signal power, tests of correct jack polarity (detects reversed tip and ring), and indicates call addressing for correct telephone extensions.

What is Phone Line Tester Used For?

Phone line tester or telephone line tester is mainly applied to check the operating parameters of the telephone company's wiring at the modular connector which includes the open circuit or “on-hook” line voltage, the ringer voltage, and the polarity of the line. The phone line's voltage conditions are indicated by a meter and the polarity of the line connections is indicated by an LED. The wires in the phone cables are color-coded, with the green wire being the positive side, and the wire being the negative side. When there is no load on the line, that is, when all phones in your home or office are oil hook, the measured voltage at your phone's modular connector should be greater than 40-volts DC, give or take a smidgen. And normally, polarity is normally not a problem for most standard phones will work regardless of the polarity of the DC voltage on the telephone line. However, reversed line polarity can interfere with certain kinds of switching equipment, in particular, some of the low-cost conference and multi-use switchers, so we've provided for that test.

How does a Phone Line Tester work?

The phone line tester shown in the following picture is connected to the phone line through modular connector P1. The tester only uses two of its four connectors-the red and the green. If it is correct-that is, if the green wire is the positive side-and the red wire is the negative side, nothing will happen. If the situation is reversed. The LED will light. With switch SI Set for LINE/RING. Both S1-a and S1-b are open and the meter indicates the condition of the line-voltage. Any line voltage reading in the LINE OK range (more on the meter in a moment) indicates a line voltage higher than 40-volts DC. If the telephone is caused to ring, either by using a ring back number or by dialing from another phone, the meter will indicate RING OK, and the LED will pulse (indicating AC), if the ringing voltage/current is correct. The actual position of the meter's pointer depends on how ringers are connected across the line. (Three or more of the old-fashioned ringers can excessively load the ringing voltage if the local telephone company has not corrected for your ringer load.) When S1 is closed the voltage range of the meter is changed and a nominal load resistance of 230 ohms (R5 and R6) is connected across the line to emulate the off hook load of the telephone. If the meter indicates LOOP OK, you can be certain that you have sufficient loop voltage for satisfactory telephone operation. If you place another load on the line, perhaps by taking an extension telephone off hook, the meter reading will almost invariably drop below the LOOP OK range. That is perfectly normal; the line is operating properly when a single loop load results in a LOOP OK meter reading. That is how to test telephones for proper connection. If lifting the handset causes the meter reading to drop, you can at least be certain that the telephone's hook switch is working and that the repeat coil is connected to the line.

Features of Phone Line Tester

• Receiving and reproducing telephone system dial tone to determine the quality of the tone
• Equipped for jack and cross-connect systems access
• Receiving tracing signals for identifying specific conductors in a cable run (TRACE function requires a separate tone generator)
• Volume control to adjust test tones
• Durable, moisture-resistant case and speaker for long-life durability

Except for phone line tester, there are many other types of test equipments and tools for the communications applications, such as EXFO FTB-200, RJ45 tester, underground wire tracer and visual fault locator, etc.

Article Source: Introduction of Phone Line Tester

Overview Of Aerial Fiber Cables

Aerial Fiber Optic Cables are used very commonly in optical communication nowadays. We can even see the aerial cables hanging in the pole around our daily life. In order to adjust to the harsh outdoor environment and prevent fiber theft, the aerial fiber optic cable is made up of different materials, which is not the same as a typical fiber optic cable. Today, we will take you to learn more about the aerial fiber optic cables.

What is Aerial Fiber Optic Cable?
Aerial fiber optic cable is a type of fibre optic cables that is usually used for outside installation on poles. Due to its installation environment, the design of aerial fiber optic cable must consider to protect it from the destruction of the nature and man-made damage or theft. Aerial cable's laying method is not hard to implement as it can utilize the existing overhead pole line to install that saves more in construction costs and shortens the construction period. Aerial fiber cables are mainly used for secondary trunk level and below and usually applied to flat terrain or low fluctuation area. They are easily affected by the natural disasters, such as typhoons, ice, floods etc. as well as the influence of an outside force and the mechanical strength weakening in themselves. Therefore, the failure rate of aerial fiber optic cables are higher than the pipeline or directly buried fiber optic cables.

Types of Aerial Fiber Optic Cables
According to the installation methods, aerial fiber optic cables can be generally classified as two types: catenary wire and self-supporting. Catenary Wire Aerial Cable is regular outdoor loose tube cables that can be helically lashed to a messenger or another cable (common in CATV). Self-Supporting Aerial Cable, or All-Dielectric Self-Supporting (ADSS) cable (the common style such as Figure-8 Aerial Cables also called Figure-8 cables), has cable bonded to an insulated steel or all-dielectric messenger for support. ADSS Cables are usually made of heavier jackets and stronger metal or aramid strength members. Nowadays, the self-supporting aerial fiber optic cables are more widely used by people.

As a familiar self-supporting aerial cables, figure-8 self-supporting aerial cables are designed for easy and economical one-step installation and widely used in long-haul and building network communication. According to the structures and materials of the cables, there are several kinds of figure-8 self-supporting aerial fiber cbales in the market, such as GYTC8S, GYXTC8Y, GYXTC8S etc. We can see the differences between GYTC8S, GYXTC8Y and GYXTC8S through the detailed information below.

GYTC8S
GYTC8S is a typical self-supporting outdoor fiber optic cable. It's suitable for aerial applications while its nice moisture resistance performance and crush resistance performance are suitable for duct and buried method. The mental strength member is made up of stranded wires as the supporting part that are completed with a polyethylene sheath to be figure 8 structure. Corrugated steel tape armored and polyethylene outer sheath provide the crush resistance and gun shot resistance features. As the central strength, the steel-wire strength member improves the tensile strength. In addition, it is surrounded by the loose tube and water blocking system.

Features:

• Excellent mechanical and environmental performance
• Small cable diameter, self-supporting, easily to install
• Low dispersion and attenuation
• Corrugated steel tape armored and polyethylene outer sheath providing crush resistance and gun shot resistance features
• Cross section shows figure 8
• Stranded wires as self-supporting member providing excellent strain performance and convenient installation
• Steel-wire strength member provides good tensility, ensures tensile strength
• Water blocking system to improve the waterproof ability

GYXTC8Y
GYXTC8Y is a light self-supporting cable with the figure-8 shape in the cross section that is suitable for installation in aerial environment for long haul communications. High tensile strength of stranded wires meet the requirement of self-supporting. It can also be used for duct and buried method. The mental strength member is similar to the GYTC8S. Steel wires and loose tubes filled with waterproof compound to ensure compact and longitudinally water blocking.

Features:

• Excellent mechanical and environmental performance
• Small cable diameter, light cable weight, self-supporting, easily to install
• Low dispersion and attenuation
• Medium density polyethylene jacket: low friction installation, excellent protection from environmental hazards
• Stainless steel or galvanized steel self-supporting
• Load-supporting element is made of zinc-coated wire provides high resistance grade to long tension
• High strength loose tube that is hydrolysis resistant
• Light self-supporting cable with the figure-8 shape
  

GYXTC8S
GYXTC8S is also suitable for installation in aerial environment for long-haul communications. This kind of figure-8 aerial cables is usually for 4-core to 12-core types. The water resistant tape provides water tight property. Corrugated steel tape and the polyethylene outer sheath provide crush resistance and gun shot resistance. The figure-8 steel wire works as self-supporting member providing excellent strain performance and convenient installation.

Features:

• With small cable diameter, light cable weight, self-support
• Excellent mechanical and environmental properties
• Proper design and precise control for fiber excess length
• Corrugated steel tape and the polyethylene outer sheath ensure crush resistance and gun shot resistance
• The water resistant tape provides water tight property

Article Source: Aerial Fiber Optic Cables Tutorial

Fiberstore Compatible 1000BASE-LX/LH SFP modules

1000BASE-LX/LH 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. The 1000BASE-LX/LH SFP module, 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. Duplex LC/PC connector.

Features

• Compliant with SFP MSA standard
• Compliant with IEEE 802.3z
• +3.3V single power supply and TTL Logic Interface
• 10km with 9/125 µm SMF
• 1310nm FP laser and PIN photodetector for 10km transmission
• Hot-pluggable SFP footprint duplex LC connector Interface
• Class 1 FDA and IEC60825-1 Laser Safety Compliant
• Duplex LC connector
• Compliant with SFF-8472
• ROHS compliant
• Average Output Power:-9~ -3dBm
• Receiver Sensitivity:-21dBm

Applications

• 1000BASE-LX/LH Ethernet
• Data storage networks

Fiberstore 1000Base-LX/LH SFP module over single-mode fiber, which is a high performance and cost effective transceiver. It is designed to meet Gigabit Ethernet (1000Base) application. The transceiver consists two sections: the transmitter section consists of a high reliability 1310nm FP LD with monitor photo detector (MPD) in eye safety; the receiver section consists of a high-speed InGaAs PIN photodiode (PD) and trans-impedance preamplifier. The output of the PD drives the post-amplification, quantizing, and optical signal detection circuits. The receiver is built in the LOS monitoring function. For further information, please see SFP MSA and SFF-8472 standard.

With plenty experience in interoperability with 3rd party standard based network equipment such as Cisco, HP, Finisar, Juniper, Netgear, 3 Com, Alcatel-Lucent, D-LINK, Extreme, and HuaWei, Fiberstore’s fiber optic transceiver are able to fulfill enterprises, service providers, telecom operators and SAN providers to build and fulfill their existing and future network expansions.

Compatible Fiber Optic Transceiver List

Brand	Model	Description
Brocade	E1MG-LX-OM	1000BASE-LX SFP SMF 1310nm 10km LC DDM
Cisco	GLC-LH-SM	1000BASE-LX/LH SFP SMF 1310nm 10km LC
Cisco	GLC-LH-SMD	1000BASE-LX/LH SFP SMF 1310nm 10km LC EXT DDM
Dell	320-2879	1000BASE-LX SFP SMF 1310nm 10km LC DDM
Extreme	Extreme 10052	1000BASE-LX SFP SMF 1310nm 10km LC DDM
Finisar	FTLF1318P3BTL	1000BASE-LX/LH SFP SMF 1310nm 10km LC DDM IND
HP	JD119B	1000BASE-LX SFP SMF 1310nm 10km LC DDM
HP	J4859C	1000BASE-LX SFP SMF 1310nm 10km LC DDM
Juniper	EX-SFP-1GE-LX	1000BASE-LX SFP SMF 1310nm 10km LC DDM
Juniper	JX-SFP-1GE-LX	1000BASE-LX SFP SMF 1310nm 10km LC DDM
Netgear	AGM732F	1000BASE-LX SFP SMF 1310nm 10km LC DDM

To save more money, We suggest that compatible 3rd transceiver modules may be another good choice however, you should make sure that your vendor is reliable. Fiberstore's SFP transceivers are 100% compatible with major brands, they are backed by a lifetime warranty so that you can buy with confidence. Additionally, customize SFP transceivers to fit your specific requirements are available. If you have any requirement of transceivers, Fiberstore will be a good choice for you.

Article Source: Compatible 1000BASE-LX/LH SFP

Ideal High-Speed Interconnect Solution

What is the Ideal High-Speed Interconnect Solution?

The ideal high-speed interconnect solution should have such features as optimized for short distances, low cost, low power consumption, small cable bend radius, low cable weight, high density, and low link latency. The only one solution which can meet all the requirements is the direct attach active optical cables.

Direct attach active optical cables, or active optical cables for short, are direct-attach fiber assemblies with fiber optic transceiver (SFP+, XFP, QSFP+, CXP etc.) connectors. They are suitable for short distances and offer a cost-effective way to connect within racks and across adjacent racks. Nowadays the Active Optical Cable (AOC) is accelerating data connectivity for storage, networking, and HPC applications. It leverages fiber optic technology for the transmission of data while reducing the weight, density and power consumption of traditional copper solutions. Note: Active optical cables have signal amplification and equalization built into the cable assembly, while passive optical cables don't. See

Advantages of Active Optical Cables

The AOC assemblies provide the lowest total cost solution for data centers by having the key advantages as following:

• Low weight for high port count architectures;
• Small bend radius for easy installations;
• Low power consumption enabling a greener environment.

Compared to Active & Passive Copper Cable Assemblies

1. Longer reach (> 7 meters)
2. Lower weight and tighter bend radius enable simpler cable management
3. Thinner cable allows better airflow for cooling
4. Lower power consumption
5. No need for power-hungry conditioning ICs on the host board
6. Can be used in architectures with challenging cable routing

Compared to Optical Transceivers

1. Datacenter/Consumer friendly: No cleanliness issues in optical connector
2. Cost-optimized: Not constrained by optical interface specifications driven by longer reach applications
(Note: However, the active optical cables cannot be routed through fiber patch panels.)

Ideal High-Speed Interconnect Solution

Today's enterprise data centers and networking environments are undergoing an infrastructure transformation, requiring higher speeds, greater scalability, and higher levels of performance and reliability to better meet the demands of business. As speed and performance demands increase, the AOC assemblies have become an integral part of the overall system design. However, AOC design margins and parameters vary widely, and can be the difference between an optimized, highly reliable fabric and the incompatibility issues that drive up support costs. There are various types of AOC assemblies for 10G, 40G, and 100G applications on the market. Judging from the cost performance, Fiberstore is the only one who can provide the most ideal high-speed interconnect solution of QSFP+ assemblies including 40G QSFP+ AOC, 40G QSFP+ breakout cable, and 40G QSFP+ to 8×LC AOC.

Article Source: Direct Attach Active Optical Cable Solution

D-Link SFP Transceiver Datasheet

D-Link SFP Transceiver Overview

D-Link Gigabit Interface Converters are transceivers that connect Gigabit switches and 10/100Mbps switches with GBIC slots to Gigabit Ethernet networks, providing high-speed connections over the fiber optic or twisted pair cable. The fiber optic transceivers have standard duplex LC connectors for connection compatibility.

Overview

• DEM-310GT, 1000BASE-LX SFP 1310nm 10km, SMF
• DEM-311GT, 1000BASE-SX SFP 850nm 550m, MMF
• DEM-314GT, 1000BASE-LX SFP 1310nm 50km, SMF
• DEM-315GT, 1000BASE-LX SFP 1550nm 80km, SMF

Small Form Pluggable (SFP) Package

These transceivers use the industry-standard Small Form Pluggable (SFP) package. They slide into the mini GBIC slot of the Gigabit device. They provide the necessary signal amplification for data to be transmitted to the network cable from the port, and vice versa, for the port to receive data from the network cable.

Hot Swappable

All D-Link Mini GBIC transceivers are hot-swappable. You can remove or replace the GBIC transceiver with the system powered on. This permits modules and mini-GBICs to be added or swapped without interrupting the network.

Applications

Applications of the fiber transceivers include distributed multi-processing, Gigabit switch cascading, high-speed I/O file transfer, bus extension application, and channel extender/data storage.

Description of D-Link SFP

DEM-310GT is 1000BASE-LX LC SFP 1310nm transceiver module, supporting dual data-rate of 1.25Gbps/1.0625Gbps and 10km transmission distance with SMF.

• 1000BASE-LX port (IEEE 802.3z standard)
• Duplex LC connector
• Full duplex operation
• 802.3x flow control support
• Fiber type: 9um single-mode fiber up to 10 km
• W ave length: 1310nm
• Power support: 3.3V
• Power budget: 10.5dB
• Hot pluggable
• Class 1 laser product complies with EN 60825-1
• TTL signal detect indicator
• Metal enclosure for lower EMI

DEM-311GT is 1000BASE-SX SFP 850nm transceiver module, supporting dual data-rate of 1.25Gbps/1.0625Gbps and 550km transmission distance with MMF.

• 1000BASE-SX port (IEEE 802.3z standard)
• Duplex LC connector
• Full duplex operation
• 802.3x flow control support
• Fiber type: 50um or 62.5um multi-mode fiber up to 550 m
• W ave length: 850nm
• Power support: 3.3V
• Hot pluggable
• Class 1 laser product complies with EN 60825-1
• TTL signal detect indicator
• Metal enclosure for lower EMI

DEM-314GT is 1000BASE-LX LC SFP 1310nm transceiver module, supporting dual data-rate of 1.25Gbps/1.0625Gbps and 50km transmission distance with SMF.

• 1000BASE-LX port (IEEE 802.3z standard)
• Duplex LC connector
• Very low jitter
• Full duplex operation
• 802.3x flow control support
• Fiber type: 9/125um single-mode fiber up to 50 km
• W ave length: 1310nm
• Power supply: 3.3V
• Power budget: 22dB
• Hot pluggable
• Class 1 laser product complies with EN 60825-1
• TTL signal detect indicator
• Metal enclosure for lower EMI

DEM-315GT is 1000BASE-LX LC SFP 1550nm transceiver module, supporting dual data-rate of 1.25Gbps/1.0625Gbps and 80km transmission distance with SMF.

• 1000BASE-LX port (IEEE 802.3z standard)
• Duplex LC connector
• Very low jitter
• Full duplex operation
• 802.3x flow control support
• Fiber type: 9/125um single-mode fiber up to 80 km
• Wave length: 1550nm
• Power supply: 3.3V
• Power budget: 22dB
• Low power dissipation <700mW
• Hot pluggable
• Class 1 laser product complies with EN 60825-1
• TTL signal detect indicator
• Metal enclosure for lower EMI

Physical & Environmental

Operating Temperature: 0 to 50 °C
Storage Temperature: 25 to 55 °C
Humidity: 5% to 95% non-condensin

OEM Manufacturers

D-Link SFP transceivers offered by Fiberstore are third party optical modules certified fully compatible with D-Link Switches & Routers. The D-Link SFP modules can be mixed and deployed with D-Link OEM SFP transceivers for seamless network performance and interoperability.

What is DDM, DOM and RGD?

If it is your first purchase of fiber optic transceivers, you may be very confused with the fuction options "DDM", "DOM" or "RGD". So, what functons do they represent? And do you need these functions? Today, we will have a detailed explanation of them.

What's DDM?

DDM, namely Digital Diagnostics Monitoring, is a technology used in SFP transceivers in order to give the end user the ability to monitor real-time parameters of the SFPs. Such parameters include optical output power, optical input power, temperature, laser bias current, and transceiver supply voltage etc.

What's DOM?

DOM, short for Digital optical monitoring, is familiar with the DDM function. It is also a feature which allows you to monitor many parameters of the transceiver module in real-time. DOM allows you to monitor the TX (transmit) and RX (receive) of the module, as well as input/output power, temperature, and voltage. Network administrators can then check and ensure that the module is functioning correctly.

Author Note: Obviously a SFP with DDM/DOM funstion is high-ender than one which without it. This is why most of modern optical SFP transceivers support DDM/DOM functions according to the industry-standard SFF-8472.

What's RGD?

You may be confused with the difference with the SFPs with "RGD" and the one without it, or you may be interested in the "-RGD" in the product number of some SFP transceiver modules. So, what does RGD stand for? RGD means rugged transceivers. In fact, these are enhanced transceiver modules which have been designed for greater durability, and can operate under more extreme conditions. Rugged transceivers may feature enhanced ESD protection, and extended operating temperature range so that it can help eliminate field failures without the need of costly external protection devices.

Author Note: In general, a rugged SFP can be identified by its product model, ie. -RGD. Specific situations depend on the specific vendors.

Other Functions in SFP transceivers

If you have an experience of buying Cisco SFPs, you may be confused with the part number with "=", because you can not find out the difference with the one without "=" according to the specification. In fact, "=" is also called a "FRU" part where FRU stands for "Field Replaceable Units". Those are the parts that can be used as "spare" or be shipped individually to replace damaged units. But the new parts that are ordered directly from a reseller or from Cisco usually don't come with the = sign. Thus, if you want to buy an SFP transceiver with the "FRU" part, you should ask your vendor to ensure this function.

Recommended Products With These Functions

• New Cisco GLC-LX-SM-RGD compatible 1000BASE-LX/LH SFP
• New Cisco GLC-SX-MM compatible 1000BASE-SX SFP (with DDM/DOM)
• New Cisco GLC-SX-MMD compatible 1000BASE-SX SFP (with DDM/DOM)
• NEW Finisar FTLF1318P3BTL Compatible 1000BASE 1310nm 10km SFP DDM IND Transceiver Module
• NEW NETGEAR AGM731F Compatible 1000BASE-SX SFP 850nm 550m Transceiver Module (with DDM/DOM)
• NEW Juniper EX-SFP-1GE-SX Compatible 1000BASE-SX SFP 850nm 550m DDM Transceiver Module (with DDM/DOM)
• NEW Brocade E1MG-LX-OM Compatible 1000BASE-LX SFP 1310nm 10km DDM Transceiver Module

Article Source: About DDM, DOM and RGD in SFP Transceiver Module

Do SFP MSA Benefits the Optical Transceiver?

When you purchase the 1000BASE-T SFPs for your switch, you may always see such description of them: This 1000BASE-T SFP transceiver is based on the SFP Multi Source Agreement (MSA). So, what's the SFP MSA? What's defined by the SFP MSA? Do SFP MSA benefits the optical Transceiver?

Multi-source Agreement(MSA)

A multi-source agreement (MSA) is an agreement between multiple manufacturers to make products which are compatible across vendors, acting as de facto standards, establishing a competitive market for interoperable products. Products created via multiple source agreements include SFPs and other network device interfaces.New MSA will define 1550nm silicon photonics based QSFP optical transceiver for 100G data center networks on single mode fiber (SMF) infrastructure.

SFP Multi-Source Agreement: This document establishesinternationally compatible sources of a pluggable fiber optic transceiver module in support of standards for fiber optic systems including Asynchronous Transfer Mode (ATM), FDDI, Fibre Channel, Fast Ethernet and Gigabit Ethernet, and Synchronous Optical Network (SONET) / Synchronous Digital Hierarchy (SDH) applications.

This MSA document strictly defines sufficient characteristics of a SFP transceiver so that system (e.g. Ethernet switch, Router, and media converter) vendors may Implement ports on their devices so MSA compliant pluggable optical transceivers SFP from any vendor will function properly. That is, transceivers could be purchased from any of the multiple sources in the open market, like Fiberstore. See Cisco GLC-T 1000BASE-T price on Fiberstore.

SFP transceivers also include a management (I2C) interface, an Electrically Erasable Programmable Read-Only Memory (EEPROM) and optional Digital Diagnostics Monitoring (DDM, Aka Digital Optical Monitoring or DOM). The EEPROM memory space is defined in the MSA and includes information describing the transceiver's capabilities, standard interfaces (e.g., SX, LX, EX, ZX), manufacturer and other data. This data makes available to the host system over the I2C interface, as is the status of the optional DDM functions.

What is defined by the SFP MSA?

The major elements or characteristics defined in the SFP MSAs are:

Mechanical Interface

• Transceiver edge connector to host PCB-mounted electrical connector mating
• Mechanical dimensions of the device (H: 8.5mm, W: 13.4mm, D: 56.5mm)
• Insertion, Extraction and Retention forces
• Host board mechanical layout (location/size of solder pads, etc.)
• Electrical connector mechanical aspects
• Bezel design considerations for host systems
• Cage assembly dimensions

Electrical Interface

• Timing requirements and Status I/O
• Pin definitions
• Module definition interface and data field description

Digital Diagnostics Monitoring (DDM) feature common in many modern SFP transceivers is defined by reference to the industry-standard SFF-8472.

Do SFP MSA benefits the optical Transceiver?

Optical transceiver form factors, defined through SFP multi-source agreements (MSAs), benefit equipment vendors by ensuring there are numerous suppliers to select from. No longer must a system vendor develop its own or be locked in with a supplier. Pluggables also decouple optics from the line card. A line card can address several applications simply by replacing the module. In contrast, with fixed optics the investment is tied to the line card. A system can also be upgraded by swapping the module with an enhanced specification version once it is available.

I propose that all such tries to undermine the value of these standards and subvert the free operation of the marketplace be vigorously resisted by consumers. Since there are many excellent choices, network operators should specifically avoid purchasing SFP modules directly from system vendors who attempt such coercive tactics. One reason should be to save money. System vendors primarily use these tactics to protect their grossly inflated prices. Second is to aid and encourage the creation and adherence to standards and, in addition, rebuke tries to undermine them. If you plan to buy the 3rd party or OEM transceivers (e.g. Cisco SFP compatible) for your switch, you had better to choose a vendor with high reputation. I recommend Fiberstore for you. Why? You may know the answer after you try.

More Cost-effective DACs from Fiberstore

Recently, Fiberstore cut the price of Direct Attach Cables (DACs) through strengthening the cost control. This change will make the DACs more cost-effective and better promote the high speed transmission.

Direct attach cables are used to connect one mobility access switch with another when forming a stack and now they are widely used in storage, data, and high-performance computing connectivity. With the development of communication technology and the increasing demands of people, 10 Gigabit, 40 Gigabit and even higher speed transmission gradually become more popular with people. DAC cables are one of the perfect choice for such high speed interconnect solutions.

Fiberstore supplies various kinds of high speed interconnect DAC cable assemblies including 10G SFP+ Cables, 40G QSFP+ Cables, and 120G CXP Cables. All of these direct attach cables can meet the ever growing need to cost-effectively deliver more bandwidth. In addition, to satisfy the most customers who are also Cisco switches or routers users, Fiberstore offers SFP+ twinax copper cables, SFP+ active optical cables, QSFP+ copper cable, QSFP+ breakout cable and QSFP+ active optical cables with 100% compatibility for Cisco to satisfy different demands of interconnection.

Coexistence of both low prices and high quality of such products are not a easy job, but Fiberstore did it. Strive to excellent, Fiberstore strictly control the quality and each cable is 100% professional tested for maximum performance before shipping worldwide. Additionally, Fiberstore also strengthens the cost control and makes the price the most affordable. This price reduction aims to make our products become more cost-effective for our customers. At the same time, it will help promote the high speed transmission to a certain extent.

This price reduction covers most Fiberstore DAC products, with different degrees price reduction varied from 10% to 20%, and even more. The following table shows the previous and current prices of the Cisco compatible QSFP+/SFP+ DACs involving in this price reduction, as they are one of our best-selling products. Of couse, there are more DACs which are also lowered in price. For more information about the price reduction, please visit our website in category Direct Attach Cables or contact us over e-mail: sales@fiberstore.com

Table: Fiberstore Cisco Compatible QSFP+/SFP+ Cables Product & Price Changing Information

Model #	Description	Previous Price	Current Price
Q4S-AOC-10-CO	New Cisco QSFP-4X10G-AOC10M Compatible 40GBASE QSFP to 4 SFP+ Active Optical Breakout Cable 10 Meter	US$ 333.00	US$ 293.00
Q4S-AOC-7-CO	New Cisco QSFP-4X10G-AOC7M Compatible 40GBASE QSFP to 4 SFP+ Active Optical Breakout Cable 7 Meter	US$ 313.00	US$ 277.00
Q4S-AOC-5-CO	New Cisco QSFP-4X10G-AOC5M Compatible 40GBASE QSFP to 4 SFP+ Active Optical Breakout Cable 5 Meter	US$ 302.00	US$ 266.00
Q4S-AOC-3-CO	New Cisco QSFP-4X10G-AOC3M Compatible 40GBASE QSFP to 4 SFP+ Active Optical Breakout Cable 3 Meter	US$ 292.00	US$ 256.00
Q4S-AOC-2-CO	New Cisco QSFP-4X10G-AOC2M Compatible 40GBASE QSFP to 4 SFP+ Active Optical Breakout Cable 2 Meter	US$ 287.00	US$ 250.00
Q4S-AOC-1-CO	New Cisco QSFP-4X10G-AOC1M Compatible 40GBASE QSFP to 4 SFP+ Active Optical Breakout Cable 1 Meter	US$ 281.00	US$ 245.00
Q4S-PC-30-5-CO	New Cisco QSFP-4SFP10G-CU5M Compatible 40GBASE-CR4 QSFP+ to 4SFP+ Passive Copper Cable 5 Meter	US$ 130.00	US$ 117.00
Q4S-PC-30-3-CO	New Cisco QSFP-4SFP10G-CU3M Compatible 40GBASE-CR4 QSFP+ to 4SFP+ Passive Copper Cable 3 Meter	US$ 105.00	US$ 85.00
Q4S-PC-30-1-CO	New Cisco QSFP-4SFP10G-CU1M Compatible 40GBASE-CR4 QSFP+ to 4SFP+ Passive Copper Cable 1 Meter	US$ 89.00	US$ 55.00
QQ-AC-30-10-CO	New Cisco QSFP-H40G-ACU10M Compatible 40GBASE-CR4 QSFP+ Active Copper Cable 10 Meter	US$ 349.00	US$ 240.00
QQ-AC-30-7-CO	New Cisco QSFP-H40G-ACU7M Compatible 40GBASE-CR4 QSFP+ Active Copper Cable 7 Meter	US$ 313.00	US$ 200.00
QQ-AC-30-5-CO	New Cisco QSFP-H40G-CU5M Compatible 40GBASE-CR4 QSFP+ Passive Copper Cable 5 Meter	US$ 113.00	US$ 94.00
QQ-AC-30-3-CO	New Cisco QSFP-H40G-CU3M Compatible 40GBASE-CR4 QSFP+ Passive Copper Cable 3 Meter	US$ 84.00	US$ 64.00
QQ-AC-30-1-CO	New Cisco QSFP-H40G-CU1M Compatible 40GBASE-CR4 QSFP+ Passive Copper Cable 1 Meter	US$ 52.00	US$ 42.00
10GSFP-AOC-10-CO	New Cisco SFP-10G-AOC10M Compatible 10GBASE SFP+ Active Optical Cable Assembly 10 Meter	US$ 79.00	US$ 67.00
10GSFP-AOC-7-CO	New Cisco SFP-10G-AOC7M Compatible 10GBASE SFP+ Active Optical Cable Assembly 7 Meter	US$ 76.00	US$ 64.00
10GSFP-AOC-5-CO	New Cisco SFP-10G-AOC5M Compatible 10GBASE SFP+ Active Optical Cable Assembly 5 Meter	US$ 74.00	US$ 62.00
10GSFP-AOC-3-CO	New Cisco SFP-10G-AOC3M Compatible 10GBASE SFP+ Active Optical Cable Assembly 3 Meter	US$ 72.00	US$ 60.00
10GSFP-AOC-1-CO	New Cisco SFP-10G-AOC1M Compatible 10GBASE SFP+ Active Optical Cable Assembly 1 Meter	US$ 70.00	US$ 58.00
10GSFP-PC-24-5-CO	New Cisco SFP-H10GB-CU5M Compatible 10GBASE-CU SFP+ Cable 5 Meter Passive 24AWG	US$ 38.00	US$ 33.00
10GSFP-PC-30-3-CO	New Cisco SFP-H10GB-CU3M Compatible 10GBASE-CU SFP+ Cable 3 Meter Passive 30AWG	US$ 27.00	US$ 21.00
10GSFP-PC-30-1.5-CO	New Cisco SFP-H10GB-CU1-5M Compatible 10GBASE-CU SFP+ Cable 1.5 Meter Passive 30AWG	US$ 22.00	US$ 18.00
10GSFP-PC-30-1-CO	New Cisco SFP-H10GB-CU1M Compatible 10GBASE-CU SFP+ Cable 1 Meter Passive 30AWG	US$ 18.00	US$ 15.00

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About Fiberstore:
Fiberstore is a professional manufacturer and supplier of optical networking solutions. There are nine product lines of Fiberstore which make your networking solution work perfectly. Fiber optic transceivers and direct attach cables (DACs) are the important component in data transmission. Fiberstore offers many kinds of products to satisfy all the aspects of the requirements. All of our transceiver modules and DACs are cost-effective. The aim of Fiberstore is to offer the best quality products and perfect solutions, to save customers's time and money, and to make customers enjoy personalization.

Original News: Price Reduction of Fiberstore Direct Attach Cables

What's the Difference Between Transceiver & Transponder?

In a fiber optic communication network, there are many equipment and facilities to support the normal operation of the system. Fiber optic transponder and fiber optic transceiver are the one of these devices. Literally, both of them are with a prefix "trans". It seems to imply that there is a similarity between them. Actually, they are not the same. So, what's the difference between them, something difference on principle or applications? Today, we are going to have a discussion on this topic.

First, in order to better understand the difference between a fiber optic transceiver and a fiber optic transponder, we need to define what each one does.

Fiber Optic Transceiver Most systems use a "transceiver" which includes both transmission and receiver in a single module. Its purpose, in broad terms, is to transmit and receive data. In fiber optic communication, the commonly used transceiver modules are hot-swappable I/O (input/output) devices which plug into module sockets. The transceiver acts to connect the electrical circuitry of the module with the optical or copper network. Devices such as routers or network interface cards provide one or more transceiver module slot (e.g GBIC, SFP, XFP), into which you can insert a transceiver module which is appropriate for that connection. The optical fiber, or wire, plugs into a connector on the transceiver module. There are multiple types of transceiver module available for use with different types of wire, fiber, different wavelengths within a fiber, and for communication over different distances. The most commonly used fiber optic transceivers include GBIC, SFP, SFP+, XFP, CFP, QSFP etc. They are widely used for different application, eg. 10G, 40G fiber optic transmission.

Fiber Optic Transponder "Transponder" includes a transmitter and a responder. It is a similar device with transceiver. In optical fiber communications, a transponder is the element that sends and receives the optical signal from a fiber. A transponder is typically characterized by its data rate and the maximum distance the signal can travel. According to its specific applications, it is also known as wavelength-converting transponder, WDM transponder or fiber to fiber media converter. Fiber optic Transponders extend network distance by converting wavelengths (1310 to 1550), amplifying optical power and can support the “Three Rs” to Retime, Regenerate and Reshape the optical signal. In general, there is an O-E-O (optical-electrical-optical) function with this device. Fiber optic transponders and optical multiplexers are usually present in the terminal multiplexer as an important component for WDM (Wavelength Division Multiplexing) system. In addition, in nowadays market, many transponders are designed as protocol and rate-transparent fiber media converters that support SFP, SFP+ and XFP transceivers with data rates up to 11.32 Gpbs, and with seamless integration of different fiber types by converting multi-mode fiber to single-mode fiber, and dual fiber to single-fiber.

Fiber Optic Transceiver vs Fiber Optic Transponder A transponder and transceiver are both functionally similar devices that convert a full-duplex electrical signal in a full-duplex optical signal. The difference between the two is that fiber transceivers interface electrically with the host system using a serial interface, whereas transponders use a parallel interface. So transponders are easier to handle lower-rate parallel signals, but are bulkier and consume more power than transceivers. In addition, transceivers are limited to providing an electrical-optical function only (not differentiating between serial or parallel electrical interfaces), whereas transponders convert an optical signal at one wavelength to an optical signal at another wavelength. As such, transponders can be considered as two transceivers placed back-to-back.

Author's Note I hope you can start down the path to fully understanding transceivers, transponders, and the difference between them, particularly in a networking, Ethernet, or fiber-optic communications setting after reading this article. Of cause, knowledge is endless, if you still want to get more information about transceiver and transponder, I suggest that you should find more references to read. If you just need to buy the related products, I will recommend Fiberstore.com to you as usual.

Article Source: Difference Between Transceiver & Transponder

How to Use Linksys SFP modules

LINKSYS, a division of Cisco Systems. Linksys SFP modules include 100BASE-LX SFP, 100BASE-FX SFP, 1000Base-T SFP Transceiver, 1000Base-SX SFP Transceiver and 1000BASE LX/LH SFP Transceiver, etc. This paper tells us how to use the Linksys SFP modules.

Tips: The Linksys company was founded in 1988. It is currently owned by Belkin, who bought it from Cisco, its owners from March 2003 to March 2013. Its products were branded as Linksys by Cisco when it was part of Cisco.

Description of MFE and MGE SFP Transceiver Modules

MFE Transceivers

• MFELX1 100BASE-LX SFP transceiver, for single-mode fiber, 1310 nm wavelength, support up to 10 km, with Duplex LC connector
• MFEFX1 100BASE-FX SFP transceiver, for multimode fiber, 1310 nm wavelength, support up to 2 km, with Duplex LC connector
• MFEBX1 100BASE-BX-20U SFP transceiver for single-mode fiber, 1310 nm wavelength, support up to 20 km, with Single LC connector

MGE Transceivers

• MGBT1 1000BASE-T SFP transceiver for category 5 copper wire, support up to 100 m, with RJ45 connector
• MGBSX1 1000BASE-SX SFP transceiver, for multimode fiber, 850nm wavelength, support up to 550 m, with Duplex LC connector
• MGBLX1 1000BASE-LX SFP transceiver, for single-mode fiber, 1310 nm wavelength, support up to 10 km, with Duplex LC connector
• MGBLH1 1000BASE-LH SFP transceiver, for single-mode fiber, 1310 nm wavelength, support up to 40 km, with Duplex LC connector
• MGBBX1 1000BASE-BX-20U SFP transceiver, for single-mode fiber, 1310 nm wavelength, support up to 20 km, with Single Lc connector

These Modules insert into the mini-GBIC ports on either the SR2024 or SR224G, creating new Gigabit ports. Each Gigabit SFP Module is h ot-swappable, meaning you can connect them even when the switch is running. Use the following directions for inst alling and removing either the MGBLH1 and MGBSX1 or the MGBT1.

Installation and Removal Directions for the MGBLH1 and MGBSX1

1. Insert the Gigabit SFP Module with the printed side up and the rubber port cap facing out.

2. Remove the Gigabit SFP Module’s rubber port cap.

3. Connect the fiber cable’s LC Con- nector to the Gigabit SFP Module’s port.

4. Now the fiber is connected to the Gigabit SFP Module and should be functioning. Connect the other end of the cable to an SFP Module to verify that the fiber connection is complete.

5. Press the fiber cable’s connector and pull to remove the fiber cable from the Gigabit SFP Module.

6. To remove the Gigabit SFP Module, begin by pulling the Module’s bail latch.

7. Now, remove the Gigabit SFP Module.

Installation and Removal Directions for the MGBT1

1. Insert the Gigabit SFP Mod- ule with the printed side up and the pull tab facing out.

2. Lock the Gigabit SFP Module in place.

3. Connect the Cat5 cable to the Gigabit SFP Module’s port. Connect the other end of the Cat5 cable to another switch that is equipped with a Link- sys MGBT1 or Gigabit Ethernet port.

4. Press the RJ-45 connector’s tab and pull to remove the Cat5 cable from the Gigabit SFP Module.

5. To remove the Gigabit SFP Module, begin by pulling the Module’s pull tab.

6. Now, remove the Gigabit SFP Module.

Article Source: Linksys SFP modules

Fiber Optic Transceivers Today and Tomorrow

Fiber optic transceivers is a self-contained component that can both transmit and receive. Usually, it is inserted in devices such as routers or network interface cards which provide one or more transceiver module slot, such as GBIC module, SFP transceiver, XFP, etc.

Fiber Optic Transceivers Today

Fiber optic transceivers for applications in the field of datacom are mostly characterized by a couple of established international standards. These standards define the electro-optical performance of a transceiver/transponder as well as its pinout and its physical outline and package, including the corresponding fiber optic connector interfaces.

Fiber optic transceivers meeting these standard are operating worldwide in numerous applications in mainframes, server clusters, storage area networks, wide area networks, and local area networks, and currently around 20 to 30 worldwide competing suppliers have been established. The number of partners involved in some important multisourcing agreements has seen an increase since 1989. This is also indicative of the increasing importance of industrial associations where both suppliers and applicators are represented. This speeds up the market penetration of novel components, systems, and applications. Nowadays, this does not seem to generate conflicts with the commonly agreed normative power of international standardization organizations such as the Internationnal Organization for Standardization (ISO), International Electrotechnical Commission (IEC), and International Telecommunication Union (ITU).

The demand for these transceivers has continuously increased during the past 10 years, and the prices have shown dramatic decreases of order of 25% per year. Consequently, the goal of all manufacturers is to offer a high level of performance, reliability, quality, and serviceability while maintaining cost-effective production in the face of drastically increased volumes to meet the market pricing.

Some Aspects of Tomorrow's Transceivers

The bit rates of fiber optic transceivers are continuously increasing in order to meet the worldwide demand for ever higher bandwidths. These bandwidth increases are called for by both existing storage and networking markets, as well as the parallel computing industry and high end server design.

In the past 10 years, a significant reduction of transceiver module size was possible due to significant progress in the downsizing of optical subassemblies and associated passive and active electronic comparison of the ESCON/SBCON outline, multistandard, small form factor (SFF), and parallel SNAP-12 transceivers. The function of the transceivers shown is described in detail in my previous blog posts.

Future transceiver design is likely to focus on power consumption, electromagnetic compatibility and immunity, and density. As data rates continue to increase, we will start to see transceivers used closer to the ICs on the board and not just at the card edge. It has also been demonstrated the is possible to incorporate optical components onto a chip, completely avoiding the deficiencies of high-speed signals on copper board traces. While these advancements may take their place in high-end computing systems, classical card edge transceivers are likely to continue to play their role into the foreseeable future to allow fiber cable connection for SANs and networking.

Where to Buy Fiber Optic Transceivers

Fiber optic transceiver is a very popular format that's recommended by a large number of fiber optic component providers. Fiberstore provide a full range of optical transceivers. Cisco, especially, you can find a full product line of our Cisco SFP modules, such as Cisco GLC-T 1000BASE-T, SFP-GE-T, GLC-FE-100LX, etc. Our SFP and SFP+ moduels are 100% compatible with a good price and enjoy same-day shipping.

What is the difference between GLC-T and SFP-GE-T?

What is the difference between SFP-GE-T and GLC-T? I have some information from Cisco Support Forums:

• GLC-T, 1000BASE-T SFP transceiver module for Category 5 copper wire, RJ-45 connector.
• SFP-GE-T, 1000BASE-T SFP transceiver module for Category 5 copper wire, extended operating temperature range, RJ-45 connector

GLC-T SFP copper SFP is a fiber optic transceiver module via Category 5 copper lines, Cisco GLC-T fiber transceivers provide 1Gbps data transfer and it provides full-duplex Gigabit Ethernet connectivity to high-end workstations and between wiring closets over existing copper network infrastructure. GLC-T SFP is compliant to IEEE 802.3 and its dimension is 0.6 in x 2.8 in x 0.6 in. GLC-T is with plug in module type Mini-GBIC.

3rd-party GLC-T Key Features

• Support 1000BASE-T Operation in Host Systems
• For 100m reach over Cat 5 UTP Cable
• Hot-Pluggable SFP Footprint
• Support RX_LOS as Link indication function
• Fully metallic enclosure for low EMI
• Low power dissipation (1.05 W typical)
• Compact RJ-45 connector assembly
• Compliant with SFP MSA and IEEE Std 802.3-2002
• Detailed product information in EEPROM
• Commercial temperature range (COM): 0 to 70°C

Cisco SFP-GE-T fiber optic transceiver that works with 1000BASE-T. SFP-GE-T is with extended working temperature and it is with DOM support. SFP-GE-T is small form transceiver with RJ45 connector interface and it is with spring latch for high density applications.

3rd-party SFP-GE-T Key Features

• Support 1000BASE-T Operation in Host Systems
• For 100m reach over Cat 5 UTP Cable
• Hot-Pluggable SFP Footprint
• Support RX_LOS as Link indication function
• Fully metallic enclosure for low EMI
• Low power dissipation (1.05 W typical)
• Compact RJ-45 connector assembly
• Compliant with SFP MSA and IEEE Std 802.3-2002
• Detailed product information in EEPROM
• Commercial temperature range (COM):0 to 70°C

The third-party GLC-T and SFP-GE-T have the same Key Features. So no difference between them? I think that they are operationally identical and can be interchanged with no problems - the only difference is that the SFP-GE-T conforms to NEBS Level 3 and the GLC-T doesn't. And Then question is what is NEBS Level 3? I'll also add that the SFP-GE-T is a little bit more expensive...maybe $40 more (retail) but it works in switches or routers like the ASR while the GLC-T is for switches only.

What is NEBS and why is it important?

Long a requirement for equipment used in the Central Office in the North American Public Switched Network, the rigorous Network Equipment Building System (NEBS) criteria have become a universal measure of network product excellence. The NEBS compliance of GDC's products is a key advantage for access providers including Local Exchange Carriers (LECs), Competitive Access Providers (CAPs), Competitive Local Exchange Carriers (CLECs), Internet Service Providers (ISPs), and Access Service Providers (ASPs). Products that are NEBS certified are also expected to be top performers in enterprise net- work environments as well.

What does NEBS Level 3 Certified mean?

NEBS has three levels, Level 1, Level 2, and Level 3. Level 1 refers to cases where minimum compatibility with the environment is needed. Level 2 applies for limited operability of the product. 

Finally, NEBS Level 3 certification guarantees the maximum operability of the equipment. It also certifies that the equipment will perform well in harsh environmental conditions and will not interfere with other electronic devices around. NEBS Level 3 certified networking equipment is vital in mission-critical applications. More information about NEBS please Google it.

In a word, GLC-T with 1000BASE-T standard, SFP-GE-T with 1000BASE-T NEBS 3 ESD. But, for a 3rd-party SFP module, I still don't know what the difference between them.

High Performace Finisar 3rd Optical Transceiver Recommendation

Fiberstore's broad optical module product selection and innovative technology have made they the optical module manufacturer of choice for all major networking equipment vendors worldwide. Fiberstore provide a full range of optical transceivers, such as SFP+ (SFP Plus) transceiver, X2 transceiver, XENPAK transceiver, XFP transceiver, SFP (Mini GBIC) transceiver, GBIC transceiver, CWDM/DWDM transceiver, These products are fully compliant with major brands like Finisar, Cisco, HP, Juniper, Nortel, Force10, D-link, 3Com. Application in Ethernet, Fibre Channel, Infiniband, SONET/SDH/OTN and PON network and operate at data rates up to 100 Gb/s. Then, let me introduce Fiberstore's Finisar compatible optical modules to you.

Finisar Modules are available in a wide variety of form factors:
SFP (copper and optical; longwave, shortwave and WDM)
– Datacom applications using Fast Ethernet, Gigabit Ethernet, 1x/2x/4x Fibre Channel
– Telecom applications using OC-3/STM-1, OC-12/STM-4 and OC-48/STM-16 across all reaches
Features

• 3.3 V operating voltage
• Distances from very short links up to 100+ km
• Wide operating temperature range
• Metal enclosure for lower EMI
• Digital diagnostics
• Wireless CPRI/OBSAI compliant

Recommended Compatible SFP Modules:

• Finisar FTLF8519P2BNL, compatible 2g fiber channel 850nm SFP ext transceiver. Up to 550m on 50/125μm mmf, 300m on 62.5/125μm mmf with duplex lc connector interface.
• Finisar FTLF8524P2BNV, compatible 1000BASE 850nm 550m SFP, with duplex lc connector interface.
• Finisar FCLF-8521-3, Finisar copper 10/100/1000 SFP, compatible 1000BASE-T SFP transceiver module, for 100m reach over cat 5 utp cable.
• FTLF1318P3BTL, compatible 1000BASE 1310nm 10km SFP ddm ind transceiver module.
• FTLF1319P1BTL, compatible 2g fiber channel 1310nm 10km SFP transceiver module, hot-pluggable SFP footprint lc optical transceiver.
  

SFP+ (optical; longwave, shortwave and tunable)
– Datacom applications using 10 Gigabit Ethernet and 2x/4x/8x/16x Fibre Channel (LW and SW)
– Telecom and Datacom applications using either SONET or 10 Gigabit Ethernet (Tunable)
Features

• 3.3 V operating voltage
• Supports bit rates up to 28.05 Gb/s (LW and SW) and 11.3 Gb/s (Tunable)
• Distances from short links up to 80 km metro (LW and SW) and 80km (Tunable)
• Wide operating temperature range
• Digital diagnostics
• Wireless CPRI/OBSAI compliant (LW and SW)

Recommended Finisar SFP+ Modules:

• FTLX1471D3BCL, 10GBASE-LR SFP+ 1310nm 10km transceiver module, 1310nm dfb-ld transmitter with duplex lc connector interface.
• FTLX8571D3BCL, compatible 10GBASE-SR SFP+ 850nm 300m transceiver module with duplex lc connector interface.
• FTLX8571D3BCV, compatible 1G/10G SFP+ 850nm 300m transceiver module, maximum link length of 300m on 2000 mhz-km mmf single 3.3vpower supply.

CFP Family (optical; longwave and shortwave)
– Datacom applications using 40G and 100G Ethernet
– TELECOM applications using OTU3 and OTU4 Features

• Hot-pluggable, MSA-compliant CFP, CFP2 and CFP4 form factors
• Supports 39.8 Gb/s to 112 Gb/s aggregate bit rates
• Maximum link length of 100m on OM3 MMF, 150m on OM4 MMF, 10km on SMF, and 500km in Amplified DWDM Applications
• Single 3.3 V power supply

QSFP (optical; longwave and shortwave)
– Datacom applications using 40G Ethernet and high-density 10G Ethernet
– TELECOM applications using OTU3 Features

• Four-channel full-duplex transceiver module
• Hot Pluggable, MSA-compliant QSFP+ form factor
• Maximum link length of 300m on OM3 MMF, 450m on OM4 MMF, and 10 km on SMF
• Multirate capability; supports 1.06 Gb/s to 11.15 Gb/s per channel

XFP (optical; longwave, shortwave, DWDM, and tunable)
– Datacom applications using 10 Gigabit Ethernet and 10x Fibre Channel
– Telecom applications using OC-192/STM-64
Features

• Supports bit rates up to 11.3 Gb/s
• Distances up to 200 km
• Digital diagnostics

X2/XEN PAK (optical; longwave and shortwave)
– DATACO M applications using 10 Gigabit Ethernet and 10x Fibre Channel
Features

• Supports bit rates up to 10.5 Gb/s
• Distances up to 10 km
• Digital diagnostics

To save more money, I suggest that compatible 3rd transceiver modules may be another good choice but you should ensure that your vendor is reliable. Fiberstore's fiber optic transceivers are 100% compatible with major brands, they are backed by a lifetime warranty so that you can buy with confidence. Additionally, customize optical transceivers to fit your specific requirements are available. If you have any requirement of transceivers, Fiberstore will be a good choice for you.