Tag Archives: SFP transceiver


Cisco is a worldwide leader in the telecommunication industry whose routers, switches are very welcome among the users. To work well with those Cisco networking applications, Cisco SFP transceivers are the best choice. GLC-SX-MM, GLC-SX-MMD, GLC-SX-MM-RGD and SFP-GE-S are different types of Cisco 1000BASE SFP transceiver module. All these transceiver modules comply with IEEE 802.3z 1000BASE standard. And since there are similar specifications for these four transceiver modules, users may be confused when they need to choose one SFP module for their Cisco switches. Here we’ll make a comparison of GLC-SX-MM, GLC-SX-MMD, GLC-SX-MM-RGD and SFP-GE-S transceiver modules to help you choose the suitable one.


Which transceiver module will you choose?

Cisco Transceiver Datasheet

Here are the datasheets of these four different Cisco SFP transceiver modules.

GLC-SX-MM Datasheet

The GLC-SX-MM is programmed to be fully compatible and functional with all intended Cisco 1GB switching devices. This transceiver module operates on ordinary multimode fibre optic link spans of up to 550 meters in length.

Transceiver Module
LC duplex
Tx Power
-9.5 ~ – 3dBm
Receiver Sensitivity
< -17dBm
DOM Support
Temperature Range
0 to 70°C (32 to 158°F)
Cable Type
Price(US dollars)
GLC-SX-MMD Datasheet

The GLC-SX-MMD 1000BASE transceiver module is made for multimode fibre only. It’s the replacement of GLC-SX-MM which features an enhanced DOM interface. And this SFP fibre transceiver module operates on legacy 50 µm multimode fibre links up to 550 meters.

Transceiver Module
LC duplex
Tx Power
-9.5 ~ – 3dBm
Receiver Sensitivity
< -17dBm
DOM Support
Temperature Range
0 to 70°C (32 to 158°F)
Cable Type
Price(US dollars)
GLC-SX-MM-RGD Datasheet

The GLC-SX-MM-RGD transceiver module is designed for Industrial Ethernet applications, including factory automation, intelligent transportation system and other deployments in hash environment. Compared with the ordinary transceivers which can endure the temperature ranging from 0 to 70°C,CLC-SX-MM-RGD can survive in the temperature from -40 to 85°C. It can support up to 550 meters of cabling.

Transceiver Module
LC duplex
Tx Power
-9.5 ~ – 3dBm
Receiver Sensitivity
< -17dBm
DOM Support
Temperature Range
-40 to 85°C (-40 to 185°F)
Cable Type
Price(US dollars)
SFP-GE-S Datasheet

The Cisco SFP-GE-S transceiver provides a high performance and cost-effective small form factor pluggable module for 1000BASE-SX Gigabit Ethernet and 1G Fibre Channel application. It’s designed for short wavelength applications. The max distance for this transceiver module is 550 meters. Besides, it also supports DOM.

Transceiver Module
LC duplex
Tx Power
-9.5 ~ – 3dBm
Receiver Sensitivity
< -17dBm
DOM Support
Temperature Range
0 to 70°C (32 to 158°F)
Cable Type
Price(US dollars)


From the above Cisco transceiver datasheet, we have learned that these Cisco transceiver modules share many similarities. All of them can support up to 550 meters over multimode fibres. And they are designed with the same 850m wavelength, Tx power and LC duplex interface. The main difference is the DOM (Digital Optical Monitoring) function and operating temperature.

·DOM function

Except GLC-SX-MM, all the others support DOM. With this function, users can monitor the transceiver module’s parameters in real time like optical input and output power, temperature and so on.

·Operating Temperature

GLC-SX-MM, GLC-SX-MMD and SFP-GE-S can work at the same temperature ranging from 0 to 70°C. But GLC-SX-MM-RGD SFP transceiver can work in a wider operating temperature of -40 to 85°, which is especially suitable for industrial Ethernet switches.


According to the above discussion, we can say GLC-SX-MM, GLC-SX-MMD, GLC-SX-MM-RGD and SFP-GE-S transceivers share many similarities. However, please note that the differences still exist, and ensure the transceiver module you choose will be compatible with the existing networking equipment. FS.COM is the one-stop shop to help you get these Cisco transceivers and other networking products that are compatible with the Cisco transceivers. If you have any questions in buying guide, please contact us via sales@fs.com.

What Kind of SFP Fibre Cable Should I Choose?

Gigabit Ethernet has supplanted Fast Ethernet in wired local networks and becomes ubiquitous throughout the world, serving as one of the most prevalent enterprise communication standard. The Gigabit Ethernet standard supports a maximum data rate of 1 gigabit per second (Gbps)(1000 Mbps), 10 times faster than Fast Ethernet, yet is compatible with existing Ethernet. To link your switches and routers to a Gigabit Ethernet network, you need a Gigabit Ethernet transceiver module as a transmission medium. This article intends to introduce the most commonly used one—SFP transceivers. What kind of SFP fibre cable should I choose for my SFP?

SFP Fiber Cable

What Is SFP Transceiver?

SFP, short for small form-factor pluggable is a compact, hot-pluggable transceiver used for both telecommunication and data communications applications. SFP transceiver can be regarded as the upgrade version of GBIC module. Unlike GBIC with SC fibre optic interface, SFP module is with LC interface and the main body size of SFP is only about half of GBIC so that it can save more space. SFP interfaces a network device mother board (for a router, switch, media converter or similar devices) to a fibre optic or copper networking cable. It is designed to support SONET, Gigabit Ethernet, Fibre Channel, and other communications standards.

Types & Applications of SFP transceivers

SFP transceivers are available with various transmitter and receiver types, which facilitates users to select the appropriate optical transceiver for different optical reach and optical fibre type (single-mode fibre or multimode fibre) required by different link. SFP transceiver modules can be divided into several different categories:

Types Transmission Medium Wavelength Distance
1000BASE-T SFP Twisted-pair cabling / 100 m
1000BASE-SX SFP Multimode fibre 770-860 nm OM1-275 m/OM2-550 m
1000BASE-LX/LH SFP SMF & MMF 1270-1355 nm MMF-550 m/SMF-5 km
1000BASE-ZX SFP Single mode fibre 1550 nm 70 km
1000BASE-EX SFP Single mode fibre 1310 nm 40 km
1000BASE-BX10 SFP Single mode fibre 1480-1500 nm downstream, 1260-1,360 nm upstream 10 km
CWDM and DWDM SFP Single optical fibre various wavelengths various maximum distances

SFP transceivers are found in Ethernet switches, routers, firewalls and network interface cards. Storage interface cards, also called HBAs or Fibre Channel storage switches, also make use of these modules. Because of their low cost, low profile, and ability to provide a connection to different types of optical fibre, SFP transceiver provides such equipment with enhanced flexibility.

FS.COM Compatible SFP Transceivers for Popular Switches

FS.COM offers a full range of SFP transceivers compatible with major brands, such as Cisco, Juniper, Arista, Brocade, HPE, etc. All of these cost-effective compatible SFPs have been strictly tested to make sure 100% compatibility. The table below listed a small part of compatible SFPs supported on major branded switches.

Brand Switch Series Model Port Description
Cisco Catalyst 6500 Series WS-SUP720-3BXL 2 SFP Port
VS-S720-10G-3C 4 SFP Port
WS-X6724-SFP 24 SFP Port
Nexus 9000 Series N9K-C9396PX 48 SFP Port
IE3010 Series IE-3010-24TC 2 SFP Port
ASR 9000 Series Router A9K-MPA-20X1GE 20 SFP Port
Juniper EX 4200 Series EX4200-24T 2 SFP Port
EX4200-48T 4 SFP Port
EX4200-24T-DC 2 SFP Port
MX480 Router MX480 Router 4 SFP Port
SRX Series SRX210 1 SFP Port (Option)
QFX 5100 QFX5100-48S 48 SFP Port
Arista 7500 Series DCS-7504 48 SFP Port (Option)
DCS-7508 48 SFP Port (Option)
7050SX Series 7050SX-64 48 SFP Port
7100 Series DCS-7124S 24 SFP Port
Brocade VDX 6720 BR-VDX6720-16-R 16 SFP Port
BR-VDX6720-24-F 24 SFP Port
BR-VDX6720-40-F 40 SFP Port
SX Series SX-424F 24 SFP Port
SX-FI12GM-4-PREM 12 SFP Port
Brocade BI-RX-8 NI-MLX-1Gx20-SFP 20 SFP Port
HPE ProCurve 5400zl Series J8697A 2 SFP Port
J9548A 144 SFP Port
FlexFabric 5800 Series JC101B 4 SFP Port
JG225B 6 SFP Port
5400R zl2 Series J9584A 24 SFP Port
StorageWorks edge 2/12 348406-B21 12 SFP Port

FS.COM SFP Fibre Cable Solutions

FS.COM offers comprehensive SFP fibre cables for common and special types of SFPs, including singlemode & multimode, simplex & duplex, UPC & APC, lengths from 1 meter to 30 meters in large stocks. We also provides Cat 5e patch cables for 10/100/1000BASE-T SFPs.

Fiber Mode Connector Jacket
9/125 SMF LC Simplex PVC/LSZH
9/125 SMF SC Simplex PVC/LSZH
50/125 OM2 LC Duplex PVC/LSZH
62.5/125 OM1 LC Duplex PVC
Cat5e Patch Cables Max Distance Data Rate
Unshielded (UTP) 100m 1000Mbps
Shielded (FTP) 100m 1000Mbps


This article offers switch and SFP fiber cable solution for SFP transceivers. Besides the major brands mentioned above, we also provide SFP transceivers compatible with other brands, such as Dell, Extreme, H3C, Huawei, Intel, IBM, Netgear, Ciena, D-Link, Avago, and so on. As to special requirements, please contact Sales@fs.com for suggestion.

Related Article:What Is SFP Port of Gigabit Switch?

What’s the Difference Between Cisco GLC-SX-MM and Cisco GLC-SX-MMD?

Cisco 1000BASE SFPs keep a huge market share in the optic area. Cisco SFPs offer users optical solutions for long distance and short distance transmission. For short distance, there are 1000BASE SX SFP, such as Cisco GLC-SX-MM and Cisco GLC-SX-MMD. Though these two modules have great similarity, they are actually different. Then what’s the difference? This article will introduce the details of Cisco GLC-SX-MM and Cisco GLC-SX-MMD SFP transceiver modules.



Cisco GLC-SX-MM 1000BASE-SX SFP is a duplex transceiver for short distance transmission, operating at the wavelength of 850 nm at the data rate of 1Gbps. It connects with OM2 multimode LC patch cords supporting up to 550 meters. The hot-swappable 1000BASE-SX SFP is compatible with the IEEE 802.3z 1000BASE-SX standard. And it’s RoHS compliant.


Cisco GLC-SX-MMD 1000BASE-SX SFP is another type of hot-swappable optical transceiver for short reach data transmission. This 1000Base-SX transceiver supports data rates up to 1.25Gbps. Same to Cisco GLC-SX-MM SFP, it also has duplex LC interference. Connecting with OM2 MMF, it can support the distance up to 550 meters. It’s compliant with SFP Multi-Source Agreement (MSA) standards. Cisco GLC-SX-MMD is composed of five parts: the LD driver, the limiting amplifier, the digital diagnostic monitor, the VCSEL laser and the PIN photo-detector. The Digital Diagnostic Monitoring (DDM) function is its special feature.


From the above content, you can see the main difference between these two transceivers is the DDM. When you buy SFP transceivers in the market, you may come across this selection difficulty whether to choose an SFP with DDM or not. So what’s DDM?

DDM is short for digital diagnostic monitoring. It’s also known as diagnostic optical monitoring (DOM). Diagnostic monitoring interface outlined in the SFF-8472 MSA is an extension of the serial ID interface defined in the GBIC specification, as well as in the SFP MSA. Today, many SFP transceivers have the function of digital diagnostics monitoring according to the industry standard MSA SFF-8472. It provides the important information about the status of the transmitted and received signals. This approach allows for better fault isolation and error detection.

DDM mainly plays the role in two sides: monitoring and warning. It monitors detailed information about a transceiver. And it offers a system of alarm and warning flags which alert the host system when particular operating parameters are not in line with the normal operating parameters set by the factory. So users can find out the fault isolation according to outcomes of DDM, and predict failure possibilities and prevent such fault.

Real-time monitoring—With a 2-wire serial bus (also known as “I2C” or “I2C” protocol), digital diagnostics can monitor the SFP module’s temperature, receiver power, transmitter bias current, and transmitter power by a microcontroller inside the transceiver. Usually, the output of the physical value of each parameter is an analog voltage or current from the Trans impedance amplifier, the laser driver, or the post amplifier. Then the digitalised value can be processed as part of a control loop, trigger an alarm, or just record the data into a register.

Calibration and warning thresholds—In addition to generating digital readings of internal analog values, DDM can also produce various status bits. Calibration and warning thresholds value is made during the device manufacturing process. Comparing current values generated by DDM and factory preset limits, users will know whether or not the transceivers have met the desired operation requirements.

FS.COM Cisco Compatible GLC-SX-MM SFPs

FS.COM brings Cisco compatible 1000BASE-SX SFPs including GLC-SX-MM and GLC-SX-MMD SFPs.
The 1000BASE-SX standard optics are developed to support lower cost multi-mode fibre runs in horizontal and shorter-length backbone applications. The following figure shows two Cisco GLC-SX-MM SFP transceivers are connected by an LC MMF patch cable.


Item Part No. Description
a. 11774 Cisco GLC-SX-MM Compatible 1000BASE-SX SFP 850nm 550m Transceiver
b. 43132 2M LC UPC to LC UPC Duplex 2.0mm PVC(OFNR) OM2 Fibre Optic Patch Cable
b. 11774 Cisco GLC-SX-MM Compatible 1000BASE-SX SFP 850nm 550m Transceiver

Note: you can use GLC-SX-MMD SFPs to replace GLC-SX-MM SFPs for shorter-length backbone application, too.


This article introduces Cisco GLC-SX-MM and Cisco GLC-SX-MMD SFP transceivers. Both kinds can realise short distance connection. The difference is that GLC-SX-MMD has DDM function while the other has no. So it’s up to you to decide whether you need DDM function to monitor parameters of the SFP. Fiberstore supplies optical transceivers with DDM and without DDM to satisfy customers’ different needs. If you need more information, please contact us via sales@fs.com or visit our site www.fs.com/uk.

Related Article: A Quick Overview of Cisco 1000BASE-T GLC-T SFP Copper Module

What is Forcing Cisco Switches Using a Third Party

If you use Cisco switches, you’ll know that their hardware is very expensive on the market. Most of the time, this makes sense, however, it still makes Cisco users trying to find a way to reduce their cost on hardware.

One of the most saving ways is that use a third-party optical transceivers. SFP transceivers are developed to ensure that a single Cisco switch can accept a variety of standard plugs, especially for those SFP on the market with various optical formats. Usually, they’re even plug-and-play, without having to reboot.

When adding new Cisco routers, these may be an available method of saving money.

However, cisco would rather you spend $200 for their own branded SFP transceivers, rather than spend 10% of that for a third-party SFP.

In the rather harsh way, Cisco has even started setting up their Cisco Catalyst line of switches, attempting to completely shut down a port with a non-Cisco SFP in it.

The good thing is that a couple simple console commands to remove this restriction, so that can make it possible to use a reliable third-party SFP transceiver in Cisco hardware running IOS 12.2(25) SE or later.

Fiberstore SFP Transceiver

Two Commands Which Allow Third-Party SFPs On Cisco Switches

The first command is so well-hidden that it is absolutely undocumented. It will not even appear in the standard help lists of identify command. This is simply:

# service unsupported-transceiver

After typing this in, it will pop up a warning message, but will make no other attempt to prevent you from proceeding. Theoretically, this will allow the switch to accept third-party hardware, but often a second command is necessary to disable the automatic port shutdown.

That second command is:

# no errdisable detect cause gbic-invalid

And that is really all it takes. At this time, your Catalyst should be prepared to accept any third-party SFP plugged into it, no matter what kind of suppliers.

Is There Any Reason Not To Use Third-Party Transceivers?

When you run the “service unsupported-transceiver” command, you get a rather harsh-looking warning message. However, all it actually says is that:

  1. Cisco will not give support for third party hardware,
  2. If a third party SFP damages the Catalyst, that’s outside your warranty,
  3. If the SFP is causing a problem, Cisco will require you to replace it with an official model before they’ll provide technical assistance.

What’s the reason to believe that it is possible third-party transceivers will cause problems? According to our experience, definitely not. If your SFP is well-made and buy from a reliable supplier, there’s no reason it should cause any problems. Optical transceivers is a very basic technology, and the possibility of even if it is a poorly made one causing actual damage are very minimum.

If you purchase your transceivers from a reliable supplier, they’ll be just as dependable as the Cisco branded units, but the cost is just a small part of the Cisco SFP Module.

Always Explore Your Choices In Network Upgrades

Even if you are “locked in” to a single networking brand or vendor, that does not mean you must have to use them for everything. The basic components, like optical transceivers, are so standardized that just about any reliable model will work perfectly well.

To find the most suitable for your network solutions: Fibre optic network solutions.

Brand Compatible SFP For Optical Communications

SFP Transceivers for Telecommunications

The SFP is the more compact optical transceiver used in optical communications. It interfaces a network equipment mother board to a fibre optic or unshielded twisted pair networking cable.

This is probably the most diffused transceiver format available with a variety of different transmitter and receiver types, allowing users to select the appropriate transceiver for each link to provide the required optical reach over the available optical fibre (e.g., multimode fibre or single-mode fibre).

A drawing of a SFP transceiver is presented in Figure 1, where the particular connector for the input and output fibres that, with different dimensions, is present in all the transceivers is evidenced.

A drawing of a SFP transceiver

Figure 1. A drawing of a SFP transceiver

Optical SFP modules are commonly available in four different categories:850nm (SX), 1310nm (LX), 1550nm (ZX), and WDM, both DWDM and CWDM. SFP transceivers are also available with a copper cable interface, allowing a host device designed primarily for optical fibre communications to also communicate over unshielded twisted pair networking cable.

Commercially available transceivers have a capability up to 2.5 Gbit/s for transmission applications; moreover, aversion of the standard with a bit rate of 10Gbit/s exists, but it can be used only to connect nearby equipment, and is very useful to spare space and power consumption as interface in the client cards of line equipments.

Modern optical SFP transceivers support digital optical monitoring functions according to the industry standard SFF-8472 MSA. This feature gives the end user the ability to monitor real-time parametres of the SFP, such as optical output power, optical input power, temperature, laser bias current, and transceiver supply voltage.

SFP transceivers are designed to support SONET, Gigabit Ethernet, Fibre Channel, and other communications standards. A 1000 BASE SX SFP shown in Figure 2.

1000BASE-SX SFP 850nm

Figure 2. 1000BASE-SX SFP 850nm

One common query we hear is actually one must use a Cisco SFP with Cisco hardware? The answer is “not really” although that is not the answer Cisco wants to give. Perhaps you have used third-party compatible SFPs for your networking, and the price gap is obvious.

Brand’s SFPs And Third-Party Compatible SFPs

Brand’s SFPs such as Cisco, Cisco wants their customers buying only Cisco hardware, which is to say the least more expensive than anyone else on the market. They conduct their own optical transceivers, and try very hard to convince buyers that only official Cisco hardware will work.

Actually, a few of their hardware such as the Catalyst line will not even access third-party SFPs without running undocumented commands first!

That said, it’s simple enough to figure around. Plus, either way, the plain truth is that one optical transceiver from a reputable vendor is just as good as any other. It’s a totally standardized technology, like spark plugs, and one brand’s SFP is going to work fine with any other brand’s hardware.

And, like with spark plugs, few people beyond enthusiasts really care about the brand as long as the SFP works once installed.

When you are intending to upgrade your network, it makes sense to “cut corners” when those corners really aren’t even being cut at all. Third-party SFP optical transceivers usually cost far less than the “official” units, especially in the case of Cisco, but could supply the exact same performance you’d expect.

To get more brand compatible optical SFP transceivers, or other fibre optics equipment and any other questions you might have about your future networking needs, please don’t hesitate to contact FS.COM for everything you need to know!

Products Used in the Physical Layer

The Physical Layer, as the Layer 1 of ISO OSI Systems communications model where the mechanical and electrical specifications of physical network interface are defined. The physical network interface is considered passive network elements because they do not generate or alter data units traveling across the network. Network elements defined by the Physical Layer include (among others): Network transport media (cables) and connectors.

Network Media Types

Network media types used in Data Centre today are copper and fibre optic cables.

The following copper cables are available: Cat 1 to Cat 5, Cat 5E, Cat 6, Cat 6a, Cat7 and Twinax cables. Twinax copper cable with two conductors in a coaxial cable, which is slowly wrapped around each other; originally designed to replace RS-232 and has been redesigned for high-speed computer applications under 10 meters.

Fibre optic cable utilize light for data transmission, rather than electrical current on copper cables, Fibre optic cables have many advantages, for example, the are many times lighter and have substantially reduced bulk, no pins, a smaller and more reliable connector reduced loss and distortion, and are free from signal skew or the effects of electro-magnetic interference.

Cable Connector Types

Copper cable connectors. Currently, there are two copper connector standards are in use, RJ-45 and MRJ-21.

RJ-45: The most popular Ethernet connector in use nowadays. MRJ-21: Used in Brocade’s netlron MLX product family, provides 1GbE connectivity of up to 6 ports by the RJ-45 patch panel or RJ-45 connectors. It is a high-density, high-speed copper cable.

Optical cable connectors. Optical cable connector structure can be divided into: FC,SC, ST, LC, D4, DIN, MU, the MTP,MPO and so on in various forms.

Transceivers Are Either Copper or Optical

Copper transceivers, copper medium usually does not require any transceivers, as they are a part of the interface module. However, few of Brocade’s products use a copper SFP with an RJ-45 female connector for 1 GbE connectivity over copper medium, or XFP copper transceiver for 10GbE connectivity over CX4 copper. Figure 1 is a 1000BASE-T Gigabit Ethernet Full Duplex RJ45 100m Copper SFP Optical Transceiver.

copper sfp

Figure 1. Copper SFP Optical Transceiver

  • XFP 10GBASE-CX4: Uses a CX4 connector to provide a connection to up to 15 meters over CX4 grade copper cable.
  • SFP 1000BASE-TX: Uses a RJ-45 connector to provide a connection to up to 100meters over Cat5e or higher copper cable.
Optical transceivers.

The following optical transceivers are available: (Figure 2 is a CWDM SFP 40km Single-Mode Optical Transceiver)

cwdm sfp

Figure 2. CWDM SFP Optical Transceiver

  • SFP: Small form-factor Pluggable. Supports 100Mbps and 1Gbps Ethernet.
  • SFP+: Small Form-factor Pluggable Plus. Looks are physically identical to the SFP port but support higher speeds. Supports 10Gbps Ethernet. Might also support SFP transceivers.
  • XFP: 10 Gigabit Small Form-factor Pluggable. Supports 10Gbps Ethernet.
  • XENPAK: XENPAK transceiver is a hot-swappable I/O devices that plug into 10-Gigabit Ethernet module ports. The XENPAK transceiver is available in either optical or copper interfaces. It is used in typical router line card applications, storage, IP network and LAN.
  • X2: X2 transceiver is a standardized form factor for 10 Gb/s fibre optic transceivers that is used for data transfer rates from 10.3 Gb/s to 10.5 Gb/s. X2 transceiver is used in datacom optical links only (not telecom), and they are smaller than old generation XENPAK transceiver.
  • GBIC) Transceiver: A gigabit interface converter (GBIC) transceiver can send and receive data, which is to digitally convert media between a gigabit Ethernet network and a separate fibre optic based network.

SFP+ Twinax cables are copper cables with two SFP+ transceivers attached on either end. They are also known as Direct Attach Cables (DAC). Using SFP+ Twinax cable is significantly cheaper than connecting devices using two 10Gbps fibre optic transceivers over fibre cable. There are two types of SFP+ Twinax cables: active and passive. SFP+ Twinax cable provided by fs.com is available in lengths of 1m, 2m, 3m, 5m.

In addition, all those copper or optical products used in the Physical layer can be found in fs.com.

EX-SFP-10GE-LRM Juniper Networks SFP Module

Because of the rapid growth and development of fibre optic technologies, 10G Ethernet items are beginning to fit the growing requirement for bandwidth. SFP+ certainly is the 10G fibre optic transceiver designed for 10G Ethernet and also other high speed broadband transmissions. This post will introduce one Juniper Networks SFP+ module – EX-SFP-10GE-LRM.

Juniper SFP module is definitely the most cost-effective standards-based optical module fully suitable for Juniper Switches & Routers. The Juniper SFP modules are tested in-house prior to shipment to make sure that they’ll get to perfect physical and dealing condition before delivered worldwide. Fiberstore provides Juniper compatible SFP transceivers which may be comparable to EX-SFP-10GE-SR, EX-SFP-10GE-LRM, EX-SFP-10GE-LR, EX-SFP-10GE-ER, etc. Now, allow me to introduce Juniper EX EX-SFP-10GE-LRM first.

Juniper EX-SFP-10GE-LRM Brief Information

This Juniper compliant EX-SFP-10GE-LRM is a 10GBASE LRM SFP 1310nm, 220m transceiver module. The EX SFP 10GE LRM transceiver module combines quality with inexpensive and provides you an ideal alternative except the high price transceivers. The EX SFP 10GE LRM is 100% suitable for all Juniper series switches and modules which support SFP transceivers.


Key Features

  • Operating data rate up to 10.3Gbps
  • 1310nm VCSEL Transmitter
  • TX Power :-6.5~-0.5dBm
  • Receiver Sensitivity:-10dBm
  • Distance up to 220m @50 / 125 um MMF
  • Single 3.3V Power supply and TTL Logic Interface
  • Duplex LC Connector Interface, Hot Pluggable
  • Compliant with MSA SFP+ Specification SFF-8431
  • Compliant with IEEE 802.3ae 10GBASE-LRM
  • Power Dissipation < 1.0W
  • Built-in Digital Diagnostic Function


  • 10GBASE-LRM at 9.953Gbps/10.3125Gbps
  • Other Optical Link

This SFP (mini-GBIC) transceiver module is made for use with Juniper Networks network equipment and it is comparable to Juniper Networks part number EX-SFP-10GE-LEM. This transceiver was created to meet or exceed the specifications with the OEM also to comply with Multi-Source Agreement (MSA) standards. This item is 100% functionally tested, and compatibility is guaranteed. The transceiver is hot-swappable input/output device that allows a ten Gigabit Ethernet port to link to a fibre optic network. OEM specific configuration data is loaded onto the EEPROM with the transceiver in the factory, allowing this transceiver to initialize and perform identically to an OEM transceiver. This transceiver may be mixed and deployed along with other OEM or 3rd party transceivers and will deliver seamless network performance.

fs.com have a great quantity in store transceivers that can ship within the Juniper EX SFP 10GE LRM transceivers, there is a affordable modules here and you’ll find our Juniper EX SFP 10GE LRM beyond your expectation, Each of our module transceivers are tested in-house prior to shipping to insure that they can arrive in perfect physical and working condition. E mail us right now to save the time and value by buying from original manufacturer directly. And today Juniper SFP are 30% Off.

The Cisco Wireless LAN Controller Configuration

A distribution system port connects the controller to a neighbor switch and serves as the data path between these two devices. This chapter discusses a few common methods on the models that have these options.

Cisco 4402 controllers have two Gigabit Ethernet distribution system ports, each of which is capable of managing up to 48 access points (AP). The Cisco 4404 controllers have four Gigabit Ethernet distribution system ports, each of which is capable of managing up to 48 APs per port. The 4404-25, 4404-50, and 4404-100 models allow a total of 25, 50, or 100 APs to join the controller.The Gigabit Ethernet ports on the 4402 and 4404 controllers accept these SX/LC/T small form-factor plug-in (SFP) modules:

• 1000BASE-SX SFP module which provide a 1000-Mbps wired connection to a network through an 850 nm (SX) fibre-optic link using an LC physical connector.

1000BASE-LX SFP module which provide a 1000-Mbps wired connection to a network through a 1300nm (LX/LH) fibre-optic link using an LC physical connector.

• 1000BASE-T SFP module which provide a 1000-Mbps wired connection to a network through a copper link using an RJ-45 physical connector.

The Cisco 5508 controllers have eight Gigabit Ethernet distribution system ports through which the controller can manage multiple APs. The 5508-12, 5508-25, 5508-50, 5508-100 and 5508-250 models allow for 12, 25, 50, 100 or 250 APs to join the controller. Cisco 5508 controllers have no restrictions on the number of APs per port. However, Cisco recommends using link aggregation (LAG) or configuring dynamic AP-Manager interfaces on each Gigabit Ethernet port to automatically balance the load. If more than 100 APs are connected to the 5500 series controller make sure that more than one Gigabit Ethernet interface is connected to the upstream switch. The Gigabit Ethernet ports on the 5508 controllers accept these SX/LC/T small form-factor plug-in (SFP) modules:

• 1000BASE-SX SFP module, which provide a 1000-Mbps wired connection to a network through an 850nM (SX) fibre-optic link using an LC physical connector

• 1000BASE-LX SFP module, which provide a 1000-Mbps wired connection to a network through a 1300nM(LX/LH) fibre-optic link using an LC physical connector

1000BASE-T SFP module, which provide a 1000-Mbps wired connection to a network through a copper link using an RJ-45 physical connector

The Cisco Catalyst 6500 Series Switch Wireless Integrated Services Module (WiSM) and the Cisco 7600 Series Router WiSM have eight internal Gigabit Ethernet distribution system ports (ports 1 through 8) that connect the switch or router and the integrated controller.These internal ports are located on the backplane of the switch or router and are not visible on the front panel Through these ports the controller can support up to 300 APs.

The controller network module within the Cisco 28/37/38xx Series WiSM can support up to 6812 or 25 APs (and up to 256, 256, 350or 350 clients respectively), depending on the version of the network module. The network module supports these APs through a Fast Ethernet distribution system port (on the NM-AIR-WLC6-K9 6-access-point version) or a Gigabit Ethernet distribution system port (on the 8-, 12-, and 25-access-point versions and on the NME-AIR-WLC6-K9 6-access-point version) that connects the router and the integrated controller. This port is located on the router backplane and is not visible on the front panel.The Fast Ethernet port operates at speeds up to 100 Mbps, and the Gigabit Ethernet port operates at speeds up to 1 Gbps.

The Catalyst 3750G integrated Wireless LAN Controller(WLC) switch has two internal Gigabit Ethernet distribution system ports (ports 27 and 28) that connect the switch and the integrated controller.These internal ports are located on the switch backplane and are not visible on the front panel Each port is capable of managing up to 48 APs However, Cisco recommends no more than 25 APs per port due to bandwidth constraints. The -S25 and -$50 models allow a total of 25 or 50 APs to join the controller.

Each distribution system port is, by default, an 802.1 Q VLAN trunk port. The VLAN trunking characteristics of the port are not configurable. Some controllers support LAG, which bundles all the distribution system ports of the controller into a single 802.3ad port channel. Cisco 4400 series controllers support LAG in software Releases 3.2 and later; Cisco 5500 series controllers Support LAG in software Releases 6.0 and later; and LAG is enabled automatically on the controllers within the Cisco WiSM and the Catalyst 3750G integrated WLC switch.

FS offers its own branded 1000BASE SFP module, as the following: 1000BASE-T SFP Transceiver, 1000BASE-SX SFP Transceiver and 1000BASE-LX SFP Transceiver. Now all products from FS are 30% Off.

Cisco GLC-LH-SM SFP Transceiver Modules

SFP transceivers(Small form factor pluggable) is prefered to  easier to change and easier for maintenance rather than traditional modules and is expected to perform at data speeds of up to five gigabits per second (5 Gbps), and possibly higher.

SFP interfaces between communication devices like switches, routers and fibre optic cables, and performs conversions between optical and electrical signals. SFP transceivers support communications standards including synchronous optical networking (SONET)/synchronous digital hierarchy (SDH), gigabit ethernet and fibre channel. They also allow the transport of fast Ethernet and gigabit Ethernet LAN packets over time-division-multiplexing-based WANs, as well as the transmission of E1/T1 streams over packet-switched networks.

SFP Transceivers have a wide range of detachable interfaces to multimode/single-mode fibre optics, which allows users to select the appropriate transceiver according to the required optical range for the network. Signal transmitting rate of SFP modules range from 100Mbps up to 4Gbps or more, working distance of these SFP transceiver modules can be from 500 meters to 100 kilo meters, working wavelength of different SFP modules are typically 850nm, 1310nm and 1550nm, there are also CWDM type SFP transceivers available. There are SFP product numbers below:


GLC LH SM is the Cisco 1000Base LX/LH SFP transceiver module, it is one of the most commonly use SFP. SFP units like the GLC-LH-SM in general have different transmitter and receiver types that allow the consumer to select the best option for their specific situation. Its primary function is to interface with a networking cable and increase the connectivity between two network devices such as mother boards, routers and media converters.

There are many options when it comes to finding a GLC-LH-SM. The GLC-LH-SM SFP Transceiver from the reseller is a Cisco brand mini-GBIC but can be used to work with anyone that builds SFP ports such as HP, Finistar, and Juniper among many others. Finding a compatible transceiver can eat up valuable time for IT pros who are upgrading networks and T3 systems provides the best value and support.

Cisco GLC-LH-SM transceiver is a tool utilized to join Cisco machines like wan interfaces or network switches that make use of sfp transceiver module technological expertise. It is characterized by an LC type interface with a higher density as well as a smaller fibre optic connecter. It is suitable for both single and multimode use and has a working distance of 10 kilometers or 550 meters over MMF. It is compliant to IEEE standards in line with Gigabit Ethernet and comes in a variety of styles to ensure users have the exact choice for their needs.

The GLC-LH-SM is a SFP fibre optic transceiver works at a 1300nm wavelength. When utilized as GLC-SX-MM SFP, the unit has a tier-one laser of 1,300nm for medium range fibre applications. In MMF configuration, the maximum distance is 1,800 ft and on SMF the max distance is 10 Km (6.2 miles).