Overview of 100G Transceivers

There was a time when 10G to 40G migration was a hot spot, and as the only available 40G transceiver, 40G QSFP+ has occupied the major position in the market. However, the pace of development has never stopped and the demand for higher speed data transmission keeps growing. And now, many data center managers set their sight on 100G Ethernet. As an important component in 100G optical links, 100G transceivers gradually gain great popularity among data center managers. But unlike 40G transceiver, 100G transceiver has several types, such as CFP/CFP2/CFP4, CXP and QSFP28. How much do you know about them? This article is going to give an overview of 100G transceivers.

CFP/CFP2/CFP4

The letter “C” in CFP/CFP2/CFP4 stands for 100. The CFP transceiver is specified by MSA between competing manufacturers and it can support 100Gbps over both single-mode and multimode fiber. The electrical connection of a CFP uses 10 x 10G lanes in each direction (RX, TX) while the optical connection can support both 10 x 10G and 4 x 25G variants of 100G interconnects. With improvement in higher performance and higher density, CFP2 and CFP4 appeared. While electrical similar, they specify a form factor of 1/2 and 1/4 respectively in size of CFP. CFP, CFP2 and CFP4 modules are not interchangeable, but would be inter-operable at the optical interface with appropriate connectors.

CFP-CFP2-CFP4

Here is a table for you which shows five typical transceiver types. We can get that CFP-SR10-100G is structured with 24-fiber MTP connector interface, so it can be used with multimode MTP 24 to MTP 24 100g trunk cable to support 100G optical links over short distance; designed with LC duplex interface, CFP-LR4-100G, CFP-ER4-100G, CFP2-LR4-100G and CFP4-LR4-100G are used with LC duplex patch cable to support 100Gbps data rate over long distance.

CFP CFP2 CFP4 transceiver information

CXP

The CXP was created to satisfy the high-density requirements of the data center, targeting parallel interconnections for 12x QDR InfiniBand (120G), 100G, and proprietary links between systems collocated in the same facility. The CXP is 45 mm in length and 27 mm in width, making it slightly larger than an XFP. It includes 12 transmit and 12 receive channels in its compact package. This is achieved via a connector configuration similar to that of the CFP.

QSFP28

Similar to 40G QSFP+, 100G QSFP28 also offers four independent transmit and receiver channels, but each channel is capable of 25Gbps data rate for an aggregate data rate for 100Gbps. With an upgraded electrical interface to support signaling up to 25Gbps signals, the 100G QSFP28 makes it as easy to deploy 100G network as 10G networks. When compared to any of the other alternatives, the 100G QSFP28 increases density and decreases power and price per bit, but It has to noted that 100G QSFP28 has the same physical size as 40G QSFP+. Just like 40G QSFP+, 100G QSFP28 can be both deployed for short data transmission distance over multimode fiber and long data transmission distance over single mode fiber. For example, 100GBASE-PSM4 QSFP28 can be used with MTP single mode cable to support 100G data rate with link length up to 500 meters.

100G QSFP28 transceiveres

Conclusion

Now is the time of 100G Ethernet and 100G transceivers are indispensable to complete the 100G optical links. As there are various types of 100G transceivers available on the market, it is necessary to choose the best suitable one for your network deployment. As a professional manufacturer and supplier in optical communication industry, FS.COM provides a complete range of 100G transceivers to meet the potential requirements. The prices of all our 100G transceivers are much more affordable than the similar products in the market. Furthermore, with the mature coding technology, they can be compatible with many major brands. For more details, please visit our site.

Talk About Base-8 Connectivity and Base-12 Connectivity

The technology behind data center switches, servers and transceivers is changing quickly to accommodate the ever-increasing adoption of cloud computing, along with a growing demand for high-bandwidth applications. As 40G network has been utilized by many data centers, two types of cabling solutions are popular among data center managers—Base-8 connectivity and Base-12 connectivity. How much do you know about these two cabling solutions? This article aims to talk about Base-8 connectivity and Base-12 connectivity for network applications in detail.

Base-8 Connectivity

Base-8 connectivity builds optical links on increments of the number “eight”. In Base-8 connectivity, 8-fiber MTP trunk cable, 24-fiber or 32-fiber MTP trunk cable can be used to transmit data. Base-8 connectivity provides the most future-ready solution to support high data rate transmission requirements, and the benefits are clear. It allows for 100% fiber utilization for 4-channel (SR4, PSM4, etc.) and 8-channel (SR8, LR8) applications. In addition, it eliminates conversion modules which can reduce link attenuation by 50% and enables longer parallel link distances. Base-8 connectivity will be the cleanest path from 10G to 40G and beyond regardless of protocol.

Application of Base-8 Connectivity

Many data centers are in the process of 10G to 40G migration, and Base-8 connectivity can provide a simple and reliable solution—using the MTP/MPO breakout cable. As shown in the following picture, one 40GBASE-SR4 QSFP+ transceiver is plugged in the QSFP+ interface on the 40G switch on one side, while four 10GBASE-SR SFP+ transceivers are plugged in the SFP+ interfaces on the 10G switch on the other side. Then the MTP to LC breakout cable connects the 40GBASE-SR4 QSFP+ transceiver with the four 10GBASE-SR SFP+ transceivers. Finally, the data can be transmitted from 10G switch to 40G switch through the MTP to LC breakout cable smoothly.

application of Base-8 connectivity

Base-12 Connectivity

Base-12 connectivity makes use of fiber optical links based on increments of 12 fibers. And 12-fiber or 24-fiber MTP connector assemblies are usually used to accomplish the links, such as 12-fiber or 24-fiber MTP trunk cable. When using Base-12 connectivity, a larger number of fibers can be installed quickly because the 12-fiber or 24-fiber MTP connector can provide higher fiber cabling density. However, in Base-12 connectivity, four fibers for transmit and four fibers for receive, leaving four fibers unused per connection. In spite of this, Base-12 connectivity in some cases may still be more cost-effective which can meet the newer 40G/100G standard format.

Application of Base-12 Connectivity

For 40G network, 12-fiber MTP trunk cable can provide the simplest way. As shown in the following picture, two 40GBASE-SR4 QSFP+ transceivers are separately plugged in the QSFP+ interface on the 40G switch on each side. Then the 12-fiber MTP trunk cable connects the two 40GBASE-SR4 QSFP+ transceivers. Finally, the 40G optical link is accomplished.

application of Base-12 connectivity

Conclusion

Both Base-8 connectivity and Base-12 connectivity have their own benefits. Though Base-8 can realize 100% fiber utilization in cabling system, it is not an universal solution. While Base-12 connectivity in some cases may still be more cost-effective. As for which one to choose, it depends on the requirements of the network deployment. I hope this article can help you have a better understanding of this two cabling solutions.

Originally published at http://www.china-cable-suppliers.com/talk-about-base-8-connectivity-and-base-12-connectivity.html