April 2017

100G QSFP28 and CFP Transceiver Cabling Solutions

24. april 2017 at 10:08 | jack
By the end of 2016, 100G Ethernet has been widely deployed and becomes a significant portion in data center. Many network-equipment developers are motivated to introduce 100G devices like CFP and QSFP28 modules that consumes as little real estate and power as possible, while achieving necessary price points and delivering superior performance. This post is heading to talk about these two 100G modules and their cabling solutions.

CFP: Out With the Old
Specified by MSA among competing manufacturers, CFP is the first generation 100G transceiver which is designed after the SFP interface, but is significantly larger to support 100Gbps. As we all know, the original CFP has very large size, and in order to meet the need for higher performance and higher density in data center, there is the development of CFP2 and CFP4 specification, which specify a form-factor of 1/2 and 1/4 respectively in size of the original specification. Commonly used CFP/CFP2/CFP4 transceivers are available in 100GBase-SR10 and 100GBase-LR4.

100GBase-SR10 and 100GBase-LR4 CFP
QSFP28: In With the New
QSFP28 is the latest 100G form factor, which is a high-density, high-speed product solution designed for applications in the telecommunications, data center and networking markets. It utilizes four channels of respective signals with data rates up to 25Gbps to meet 100Gbps Ethernet requirement. 100GBase-SR4 and 100GBase-LR4 are two main types of QSFP28 module. The detailed specifications of these two QSFP28s are shown in the following table.

100GBase-SR4 and 100GBase-LR4 QSFP28
100GBase-SR10 Cabling Solution
100GBase-SR10 CFP uses a 24 strand MPO cable for connectivity (10 Tx and 10 Rx with each lane providing 10Gbps, leaving 4 channels unused). It can support maximum link length up to 100m and 150m respectively on OM3 and OM4 fiber cable. 100GBase-SR10 can also be used in 10x10 Gigabit Ethernet modes along with ribbon to duplex fiber breakout cables for connectivity to ten 10GBase-SR optical interface.

100GBase-SR10 CFP Cabling Solution
100GBase-SR4 Cabling Solution
Like 100GBase-SR10, 100GBase-SR4 QSFP28 also uses laser optimized OM3 and OM4 multimode fiber for indication. But 100GBase-SR4 QSFP28 utilizes 12f MPO trunk cable for connectivity (4 Tx and 4 Rx, leaving the middle four unused), which makes it possible to reuse 40GBase-SR4 fiber assemblies when upgrade from 40G to 100G.

100GBase-SR4 QSFP28 Cabling Solution
100GBase-LR4 Cabling Solution
Both 100GBase-LR4 CFP and QSFP28 are both interfaced with LC connector. They uses WDM technologies to achieve 100G transmission over single-mode duplex LC fiber patch cable supporting the link length up to 10km.

100GBase-LR4 Cabling Solution
As the need for high bandwidth is increasing, 100G Ethernet will widespread in data center quickly. Equipped with this basic information about 100G modules and their cabling solutions, we will have little worry upgrading to 100G Ethernet.

Applications of MTP Conversion Harness Cable

12. april 2017 at 4:34 | jack
As we all know, Base-8, Base-12 and Base-24 are three mainstream MTP backbones widely used for higher speed 40/100G data centers. Many of today's legacy infrastructures are using a Base-12 MTP backbone design, however, experience shows us that this connector is not very suitable for higher rate switches or servers. And at present, base-8 is the preferred connector for 40G (SR4) transceivers, while Base-24 is often chosen for 100G transceivers (SR10). How could we convert the previously built Base-12 backbone to the currently popular Base-8 and Base-24 backbones, or how to migrate from 40G Base-8 backbone to 100G Base-24 backbone? There comes a solution-MTP conversion harness cable. MTP conversion cable is a type of MTP harness cable, allowing users to convert their existing MTP backbone cables to an MTP type which matches their active equipment. There are mainly three types of MTP conversion cables: Base-8 conversion harness, Base-12 conversion harness and Base-24 conversion harness. The following text will mainly introduce these three conversion cable types' applications.

Base-8 Conversion Harness
Base-8 conversion harness , also referred to as 1x3 MTP conversion cable, is terminated with three Base-8 connectors at one end and one Base-24 connector at the other end. Three Base-8 connectors are combined inside the furcation housing, so that the single 24-fiber MTP connector can be plugged into the transceiver as shown in the image below. This conversion cable type allows users to convert their existing Base-8 MTP backbone trunks into a single 24 fiber MTP connector for use in SR10 (100G) deployment.

Base-8 Conversion Harness
Base-12 Conversion Harness
There are two types of Base-12 conversion harness-2x3 MTP conversion cable and 2x1 MTP conversion cable shown in the following image. 2x3 MTP conversion cable, consisted of two Base-12 connectors combined inside the housing to produce three Base-8 connection at the other end of the assembly, is often used to convert pre-installed 12-fiber backbone trunks into Base-8 connections, so that 40G data rates can be achieved. 2x1 conversion cable is attached with two 12-fiber MTP connectors at one end and a single 24-fiber connector at the other end. This type of Base-12 conversion harnessallows users to convert the 12-fiber MTP backbone trunks into Base-24 connections for achieving 100G data rates.

2x1 MTP Harness Conversion Cable
Base-24 Conversion Harness
Base-24 conversion harness is exactly the same harness as Base-8 conversion cable, but it is used to convert a Base-24 connector into 3xBase-8 connectors in the backbone based on Base-24 design. A single Base-24 connection is split into three Base-8 connections providing users with three 40G ports as shown in the picture below.

Base-24 MTP Harness Conversion
MTP conversion harness cable provides a flexible solution for the conversion from existing Base-12 backbones to popular Base-8 and Base-24 connections, and it is also a cost-effective solution for the conversion between 40G and 100G. The features and usages of three MTP conversion cable types have been introduced above. According to your practical application, you can choose the most suitable one.

Practical Application of Fiber Enclosure

1. april 2017 at 5:39 | jack
As part of overall cable-management system, fiber enclosure is used in a wide range of interconnect facility applications, from data centers to building backbone, horizontal, and entrance facilities to provide high density and safe cabling environment. Generally, there are two types of fiber enclosure often deployed in data centers: rack mount and wall mount fiber enclosure. Wall mount enclosure is for cable connecting between floor and floor, while rack mount enclosure is for cabling connecting between or within racks. Today, we're going to talk about how to deploy these two fiber enclosure types in data center.

Fiber Enclosure Overview
Wall mount enclosure, as its name indicates, is usually installed on the wall for housing and distribution of fiber optic cables for indoor application, while rack mount enclosure is often used between or within racks. Wall mount enclosure and rack mount enclosure are often loaded with fiber adapter panels (LC, SC, or MPO fiber adapter panel are commonly used) and slack spools or sometimes with MPO LC cassette. Take the wall mount enclosure in FS.COM as an example, it is often loaded with 2, 4, 8 fiber adapter panels and 2 slack spools which can provide easy-to-manage environment for fiber patch cords. Besides, it can also be loaded with 2, 4, 8 MPO cassettes as shown below for maximum density in limited space while reducing installation time.

How Can We Apply Fiber Enclosure?
As more and more cabling used in data center, cable management becomes vital. Poor patch-cord management has proven to limit cool air getting to outside ports on networking equipment, which causes early failure. Fiber optic enclosure is a good way to support cable running and managing. The following image shows the fiber enclosure application in multi-floor data center.


As the picture shows, the rack mount enclosure loaded with MPO cassettes and wall mount enclosure holding MPO fiber adapter panel are used to manage MPO patch cable or standard LC fiber cable in high density data center. The fiber adapter panel serves as the intermediate connection between multi-floor data center backbone and patching cabling, while the MPO cassette can provide the connection between 40/100G and 10G devices. The MPO cassette in the rack mount enclosure can also be replaced by MPO adapter panel for direct trunk cable to fan-out interface. No matter how you run cables in the data center, you will always route and manage the fiber cables with flexible move, add and cut(MACs) with the help of fiber enclosure.

As IT managers are more prone to high density data center, it is time to use fiber enclosure for easy-managing your fiber optic cables. All the components we have mentioned above, including MPO cassette, MPO fiber adapter panel, MPO fiber cable, wall mount and rack mount fiber enclosure can be purchased in FS.COM. If you're interested in, kindly visit FS.COM.