Mar 31

What Should We Prepare for 40/100G Migration?

As data center of all types continue to grow in terms of traffic and size, 40G and 100G Ethernet technology is no longer a pipe dream—it is well on the way and set to become the new standard for high bandwidth and intelligent architecture. Faced with this upcoming trend in data center, what preparation should we do? Read this post, and you will get some details.

LC or MPO Interfaced 40/100G Modules?

Normally, there are two interfaces that 40/100G transceivers use: LC and MPO. LC interfaced modules will be used over single-mode fiber for long distance data transmission, while MPO interfaced modules are commonly deployed with multimode fiber for short distance. However, there are also some transceivers not following this rule. For example, 40GBase-UNIV uses duplex LC connector, but it only supports 150 meters over OM3 or OM4 fiber, and 500 meters over single-mode fiber as we have mentioned in the previous post. Besides, 100GBase-PSM4 is a single-mode module, but it has MPO interface to achieve data transmission. Choosing LC or MPO interfaced 40/100G transceiver totally relies on the transmission distance that your practical application requires.

Type Fiber and Distance Connector
40GBase-SR4 100m(OM3) 150m(OM4) MPO(male/female)
40GBase-LR4 10km(SMF) Duplex LC
40GBase-UNIV 150m(OM3) 150m(OM4) 500m(SMF) Duplex LC
100GBase-SR4 100m(OM3) 150m(OM4) MPO (male/female)
100GBase-LR4 10km(SMF) Duplex LC
100GBase-PSM4 500m(SMF) MPO (male/female)
Keep Budgets Down with Pre-terminated Cabling System

Cost is always the most important factor that every IT managers and ordinary users will concern. Since the technology for 40G and 100G is not as mature as 10G, devices used in these high-speed networks are more expensive, so we should keep our budget down as possible as we can in every aspect in the process of 40/100G migration. Then pre-terminated cabling system is a good choice.

pre-terminated assemblies for 40/100G

Pre-terminated cabling system contains factory manufactured cables and modular components with connectors already attached. It comes in a number of different forms, from connectorized fan-outs and attached or discreet cassette modules to cable bundles utilizing both fiber and copper with protective pulling grips installed over the connectors at one end. With these pre-terminated cabling, the need for labor to make terminations on site will be mitigated. And fewer labor means more savings on the labor bill. As report indicates, using the pre-terminated approach can achieve a saving of 57 percent.

Punch Down Solution   Pre-terminated Cabling
Material Cost              1X            3.2X
Labor Cost              2X            1X
Total              1X            1.3X
Installation Time              10 Hrs            5 Hrs
Future-Proof Your Network with 24-Fiber Infrastructure

In many 40/100G cases, 12-fiber system is more recommended to use between core switched and the equipment distribution area in the data center, but actually, if you want to future-proof your network, try 24-fiber infrastructure. Why? Let’s have a quick comparison.

For typically 40GbE applications, the 4 right and 4 left fibers of a 12 fiber MPO connector are used for transmit and receive while the inner 4 fibers are left unused. For 24-fiber 40GbE application, all fibers are utilized in the MPO plug. 24 fibers, divided by the 8 fibers per circuit that are required, yields 3 full 40GbE connectors. For 100GbE applications, if we choose 12-fiber MPO connector, we need two connector and two MPO trunk cables, the middle 20 fibers are used for transmit and receive 10Gb/s while the 2 fibers on the right are left unused. However, in this case, we just need one MPO 24 connector and one 24f trunk cable. As data centers continue to be crowded with more cabling, with 24-fiber system, about 1-1/2 times more pathway space could be saved.

24 fiber system for 40/100G

Conclusion

With the rapid increase in bandwidth consumption, the migration from 10GbE to 40/100GbE is inevitable. Proper interfaced transceiver, pre-terminated cabling system and 24-fiber infrastructure are required to build a cost-effective and high density 40/100G data center. If you’re interested in the components that we have mentioned above, kindly visit FS.COM.

Feb 22

Suggested 100G QSFP28 Transceiver Solutions for Data Centers

In recent years, QSFP28 transceiver module has upgraded the 100G market which can support the data transmission mode of 4×25G. Currently many data centers have already adopted QSFP28 transceivers for 100G migration. Of course, there are many other types of transceivers can transfer the 100G network, but QSFP28 modules are still considered to be the optimal choice. This post is going to present some useful 100G QSFP28 transceiver solutions for data centers. Maybe one of them is exactly what you need.

Basics of QSFP28 Optical Transceiver

QSFP28 transceiver is designed for high-density and high-speed for applications in telecommunications. The transceiver offers four channels of different signals with data rates ranging from 25 Gbps up to potentially 40 Gbps, and meets 100 Gbps Ethernet (4×25 Gbps) and 100 Gbps 4X InfiniBand Enhanced Data Rate (EDR) requirements. QSFP28 optical transceiver has various advantages. It has a smaller size than other 100G modules, thus it is ideal for high-density ports on the switch. Power consumption of QSFP28 transceiver is usually the lowest of less than 3.5W. In addition, QSFP28 increases the transmission capacity of every lane from 10G to 25G, which can save much cost for each bit.

QSFP28 Transceiver Solutions

QSFP28 transceivers can be categorized into several types based on different IEEE (Institute of Electrical and Electronics Engineers ) or MSA (Multi-source Agreement) standards.

100GBASE-SR4 is the IEEE standard for 100G QSFP28 that supports short distance over multimode. It can reach 100G transmission up to 70m over OM3 and 100m over OM4. With the MTP/MPO interface, 100GASE-SR4 QSFP28 transceiver supports four lanes of 25G dual way transmission over eight fibers.

qsfp28-sr4

100GBASE-LR4 is also the IEEE standard for QSFP28 module but supports long distance transmission for the maximum of 10km over single-mode fiber. 100GBASE-LR4 QSFP28 is special for adopting the WDM technologies for four 25G lanes transmission over four different wavelengths. In addition, its duplex LC interface supports the 100G dual-way transmission.

qsfp28-lr4

100GBASE-PSM4 is the standard defined by MSA for the point-to-point 100G link over eight single-mode fibers reaching the length of up to 500m. 100GBASE-PSM4 QSFP28 transceiver uses four identical and independent lanes for each signal direction with each lane carrying a 25G optical transmission. With the MTP/MPO interface, optical fiber ribbon cables with MTP/MPO connectors can be plugged into the QSFP28 module.

qsfp28-psm4

100GBASE-CWDM4 standard was released by CWDM MSA to support 100G network for up to 2km. It uses the CWDM technology to reduce the transmission on 8 fibers (4 optical transmitters and four optical receivers) into 2 fibers. This transceiver is similar to 100GBASE-LR4 QSFP28 but has a shorter transmission range and lower cost.

qsfp28-cwdm4

Conclusion

In a word, QSFP28 modules are suggested transceiver solutions for upgrading the data center 100G network. The 100GBASE-SR4, 100GBASE-LR4, 100GBASE-PSM4, and 100GBASE-CWDM4 QSFP28 transceivers mentioned above are the most popular ones to ensure the high-speed data transmission at either short or long distance. FS.COM offers both generic and compatible QSFP28 modules according to your demands. Other than QSFP28 transceivers, there are also many other types of 100G transceivers, such as CFP, CFP2, CFP4, CXP transceivers. For more information, please kindly visit FS.COM or contact us directly via sales@fs.com.