Fiber Optics Solutions

srijeda, 31.12.2014.

Choose and Get SFP+ Module and Cables Effectively

According to the standard of the IEEE 802.3 ae committee ratified the 10 Gigabit Ethernet and the general specification, it defines a number of fiber optic interfaces. These standard interfaces attempted to satisfy a number of different objectives including support for MMF and SMF compatibility. They include SFP+ SR transceiver, SFP+ LR transceiver, SFP+ ER transceiver, SFP+ ZR transceiver, copper CU SFP+, maybe someone does not know the last one, related product you can see: Cisco SFP H10GB CU2M. Their applications are using 10 Gigabit Ethernet and 2x/4x/8x/16x Fiber channel, for example, the cisco SFP+ module, the optical interoperability with 10Gbase XENPAK, 10 GBase X2, and 10GBase XFP interfaces on the same link; the device can plug into an Ethernet SFP+ port of a Cisco switch, just do not need to power down if installing or replacing, these are all its advantages. The Cisco quality ID feature enables a Cisco platform to identify whether the module is certified and tested by Cisco. Then many people also think this problem that when we use the cisco transceiver with cisco switches or even patch cables, do they need the vendor ti physically hang the access points and do they need to configure the access points and how many buildings will the access points be installed into, well, the next paragraph will give you the answer. The vendor needs to physically hang the access points and the points are controller based and they will need to be configured. All access points are to be installed on the ceiling, the only exception would be in gym where it would to be mounted to the ceiling beam. The figure shows that push the SFP front of the module to make it into the slot.

plug into sfp transceiver

Many people know that SFP, SFP+ and they are not familiar with QSFP, then i will introduce one kind of QSFP transceiver to you. The 40 Gb/s QSFP+ transceiver. It is a kind of fiber optical modules with four independent optical transmit and receiver channels. It combines the higher density attractions of modules with some the key advantages normally associated with SFP+ based modules. And another product you also cannot forget: sfp+ direct attach cable. In Fiberstore, there is a similar attach cable, sfp+ direct attached twinax copper, it is suitable for very short distances and offer a useful way to connect within racks and across adjacent racks. Cisco offers passive twinax cables in lengths of 1, 1.5, 2, 2.5, 3 and 5 meters, and active twinax cables in lengths of 7 and 10 meters. Related product: 0.5 m sfp+ cable.

sfp+ cable

And Fiberstore's product are fully compliant with different brands, such as Cisco, hp, huawei, Finisar… and standards like Ethernet, Fibre Channel, Infianiband, SONET/SDH/OTN and PON standards, 1g sfp and 10g SFP+ and other transceivers that not mentioned such as WDM module, Bidi module all can get from Fiberstore. We have real wide variety of fiber optic transceivers. I do believe that it is a quite great choice for you.

Article Source: Fiber Optical Networking

31.12.2014. u 07:10 • 0 Komentara • Print • #

utorak, 23.12.2014.

Difference between Cisco SFP Module GLC-SX-MM and GLC-SX-MMD

With the widespread used with the Cisco switches and routers, Cisco's GBIC transceivers and Small Form-factor Pluggables (SFP) transceivers for Gigabit Ethernet and Fibre Channel applications have also been popular in the market. These small, modular optical interface transceivers offer a convenient and cost effective solution for the adoption of Gigabit Ethernet and Fibre Channel in data center, campus, metropolitan area access and ring networks, and storage area networks. The 1000BASE-SX SFP (ie, the GLC-SX-MM and GLC-SX-MMD) is one of the common types of Cisco SFPs. Compatible with the IEEE 802.3z 1000BASE-SX standard, it operates on legacy 50 Ľm multimode fiber links up to 550 m and on 62.5 Ľm Fiber Distributed Data Interface (FDDI)-grade multimode fibers up to 220 m. It can support up to 1km over laser-optimized 50 Ľm multimode fiber cable.

Due to the similar model, users are usually confused with the Cisco GLC-SX-MM and GLC-SX-MMD when they are choosing the SFP modules. So, what's the difference between them? We are going to talk something about the difference between GLC-SX-MM and GLC-SX-MMD in this paper.

As their models suggest, there is only little difference between GLC-SX-MM and GLC-SX-MMD, Obviously the "D". Here, letter D in the model means the DOM functionality. DOM stands for Digital Optical Monitoring. Digital Optical Monitoring (DOM) is an industry wide standard, intended to define a digital interface to access real-time operating parameters such as:

Optical Tx power

Optical Rx power

Laser bias current

Temperature

Transceiver supply voltage

Which means you can configure your device to monitor optical transceivers in the system, either globally or by specified ports. When this feature is enabled, the system will monitor the temperature and signal power levels for the optical transceivers in the specified ports. Console messages and syslog messages are sent when optical operating conditions fall below or rise above the XFP or SFP manufacturer’s recommended thresholds. It is an useful function and now is very popular with users.

It is worth noting that the GLC-SX-MM SFP has been no longer for sale since March 8, 2013 in Cisco. It is entirely replaced by GLC-SX-MMD. Cisco official encourages the customers to migrate to new model SFP transceiver modules. However, for usage and cost considerations, many users still use the old model SFPs. GLC-SX-MMD is much more expensive than GLC-SX-MM, but except the additional DOM function, they work as the same when use in the switch. This is why GLC-SX-MM is still used by many users. To a great extent, this situation is caused by the cost. Fiberstore offers a low cost option for you in both GLC-SX-MM and GLC-SX-MMD. No matter you still like to use the GLC-SX-MM, or wanna replace the new version GLC-SX-MMD, you can find the corresponding products in Fiberstore with a very low price and do not worry about the quality because all of Fiberstore's Cisco compatible SFP modules are tested in-house prior to shipment to guarantee that they will arrive in perfect physical and working condition before delivered worldwide. In addition, there is a big stock of these two products, you can enjoy the same-day shipping when you order them in Fiberstore.

Product Recommendation
NEW Cisco GLC-SX-MMD Compatible 1000BASE-SX SFP 850nm 550m EXT DDM Transceiver Module

glc-sx-mmd

Key Features

Data-rate of 1.25Gbps/1.063Gbps operation

850nm VCSEL laser and PIN photodetector for 550m transmission

Hot-pluggable SFP footprint duplex LC connector Interface

Class 1 FDA and IEC60825-1 Laser Safety Compliant

Compatible with SFP MSA

Compatible with SFF-8472

+3.3V single power supply and TTL Logic Interface

Average Output Power:-9.5~ -3dBm

Receiver Sensitivity:-17dBm

Extended temperature range (EXT):-5 to 85°C

Built-in Digital Diagnostic Function

Applications

Fiber Channel Links

Gigabit Ethernet Links

Fast Ethernet Links

Other Optical Links

Where to Buy

Cisco SFP transceivers offered by Fiberstore are the most cost-effective standards-based SFP modules fully compatible with Cisco Switches & Routers. Fiberstore provides a series of Cisco comaptible SFP modules which can be equivalent to Cisco GLC SX 1000BASE SX SFP (GLC-SX-MM), Cisco SFP 1000BASE LX LH SM fiber transceiver (GLC-LH-SM), Cisco GLC-SX-MMD, Cisco GLC-LH-SMD, Cisco GLC-T 1000BASE-T SFP (GLC-T), Cisco GLC-ZX-SMD, and Cisco CWDM SFP, Cisco DWDM SFP, etc.

Read More Related Article About SFP Modules:

Netgear AGM731F Compatible SFP for Gigabit EthernetApplications

Cisco SFP Module GLC-SX-MM and GLC-SX-MMD

Oznake: GLC-SX-MMD, GLC-SX-MM, Cisco SFP

23.12.2014. u 08:30 • 0 Komentara • Print • #

četvrtak, 18.12.2014.

How Much do You Know About 10/100/1000BASE-T SFP Transceivers?

10/100/1000BASE-T SFP is a triple-speed 1000BASE-T/100BASE-TX/10BASE-T IEEE 802.3az Gigabit transceiver integrated into a single monolithic CMOS chip. It can be used for both Fast Ethernet and Gigabit Ethernet applications.

This kind of SFP module supports 10/100/1000BASE-T operation in host systems with Serial Gigabit Media Independent Interface (SGMII), and with it the host systems needn't to support 1000BASE-T autonegotiation. The 10/100/1000BASE-T SFP module uses the 1000BASE-X autonegotiation information it receives from the host to adjust the configuration options that it advertises during copper autonegotiation. To the host system, the 10/100/1000BASE-T SFP will appear to be a fiber transceiver. From the host's perspective, acknowledgements received during the 1000BASE-X autonegotiation process are coming from the remote link partner even though they are coming from the 10/100/1000BASE-T SFP.

The 10/100/1000BASE-T SFP transceiver performs all physical-layer functions for 1000BASE-T, 100BASE-TX, and 10BASE-T Ethernet on standard Cat 5 UTP cable of link lengths up to 100 m (328 ft). 10BASE-T can also run on standard category 3, 4, and 5 UTP. You can safely use Cat 5e or Cat 6 cables, as these are improved versions of Cat 5. For short cable runs, with intricate routing, stranded cable is recommended, as it is more flexible.

Tips: SGMII is a mode of communication between the MAC and PHY to allow for 10/100/1000BASE-T operation. In 100BASE-TX mode, the MAC still transmits to the PHY at 1.25 Gbps, but each byte is repeated 10 times. The PHY then converts this repeated data to 100BASE-TX format. The process is the same in 10BASE-T mode but each byte is repeated 100 times.

Where can we get such cost-effective transceivers? I think most people will think about Cisco, HP, Juniper etc. But their products are not cost-effective at all. As I know, the Finisar SFP modules might be a wiser choice. The part number of Finisar copper 10/100/1000 SFP that supports 10/100/1000 autonegotiation is FCLF-8521-3. The FCLF-8521-3 is based on the proven digital signal processor technology, combining digital adaptive equalizers, ADCs, phase locked loops, line drivers, encoders, decoders, echo cancellers, crosstalk cancellers, and all other required support circuitry integrated into a single chip. With full compliance to IEEE 802.3az standard, the FCLF-8521-3 substantially lower power consumption during periods of low-link utilization.

Finisar FCLF-8521-3 comaptible SFP

Finisar FCLF-8521-3 compatible SFP offered by Fiberstore cost only 15 dollars now. Compared to the original price, we can save almost 80% by using Finisar compatible SFPs.

The following is a list of low cost Finisar Modules:

Finisar FTLF1319P1BTL Compatible 2G Fibre Channel 1310nm 10km SFP Transceiver Module, $34.00

Finisar FTLX8571D3BCV Compatible 1G/10G SFP+ 850nm 300m Transceiver Module, $18.00

Finisar FTRJ8519P1BNL Compatible 1000BASE 850nm 550m SFP Transceiver Module, $8.00

utorak, 16.12.2014.

This is who I am

It is not difficult to imagine a world short of ambition. It would probably be a kinder world: with out demands, without abrasions, without disappointments. People would have time for reflection. Such work as they did would not be for themselves but for the collectivity. Competition would never enter in. conflict would be eliminated, tension become a thing of the past. The stress of creation would be at an end. Art would no longer be troubling, but purely celebratory in its functions. Longevity would be increased, for fewer people would die of heart attack or stroke caused by tumultuous endeavor. Anxiety would be extinct. Time would stretch on and on, with ambition long departed from the human heart.

Ah, how unrelieved boring life would be!

There is a strong view that holds that success is a myth, and ambition therefore a sham. Does this mean that success does not really exist? That achievement is at bottom empty? That the efforts of men and women are of no significance alongside the force of movements and events now not all success, obviously, is worth esteeming, nor all ambition worth cultivating. Which are and which are not is something one soon enough learns on one's own. But even the most cynical secretly admit that success exists; that achievement counts for a great deal; and that the true myth is that the actions of men and women are useless. To believe otherwise is to take on a point of view that is likely to be deranging. It is, in its implications, to remove all motives for competence, interest in attainment, and regard for posterity.
We do not choose to be born. We do not choose our parents.

We do not choose our historical epoch, the country of our birth, or the immediate circumstances of our upbringing. We do not, most of us, choose to die; nor do we choose the time or conditions of our death. But within all this realm of choicelessness, we do choose how we shall live: courageously or in cowardice, honorably or dishonorably, with purpose or in drift. We decide what is important and what is trivial in life. We decide that what makes us significant is either what we do or what we refuse to do. But no matter how indifferent the universe may be to our choices and decisions, these choices and decisions are ours to make. We decide. We choose. And as we decide and choose, so are our lives formed. In the end, forming our own destiny is what ambition is about.

Oznake: words

16.12.2014. u 10:56 • 0 Komentara • Print • #

Sljedeći mjesec >>

Ovaj blog je ustupljen pod Creative Commons licencom Imenovanje-Dijeli pod istim uvjetima.