Optical Transceivers Information

Optical Transceivers Information
Industrial-grade optical transceivers and optical interconnection components.

2017年3月21日星期二

SFP Transceivers Options for Brocade 5100 Switch

Nowadays, many small and medium business and organizations such as local government, campus and some agencies etc., require fast and frequent access to database the files. A storage Area Network (SAN) with Fibre Channel (FC) switching technology (Figure 1) offers the speed and reliability for them. Brocade 5100 switch is an ideal Fibre Channel switch used for those organizations and can meet a variety of SAN environments.


Brief Introduction to Brocade 5100
The Brocade 5100 is a 1U Enterprise class Fibre Channel switch which combines 1, 2, 4, and 8 Gbps Fibre Channel technology in configurations of 24, 32 or up to 40 ports, getting an overall bandwidth of 320 Gbps. It is very flexible to users since it enables organizations to use 4Gbps SFPs today and upgrade to 8Gbps SFPs when required. By utilizing the sixth-generation ASIC (Application Specific Integrated Circuit) technology featuring five 8-port groups, it can reduce congestion and increase bandwidth. Because an ISL (Inter-Switch Link) trunk can supply up to 64 Gbps of balanced data throughput within these groups. In addition, enhanced Brocade ISL Trunking also utilizes ISLs more efficiently to preserve the number of usable switch ports. As shown in Figure 2, the port side of the Brocade 5100 includes the system status and power LED, console port, Ethernet port and LEDs, USB port, and FC ports and the corresponding port status LEDs. And the FC ports are numbered from left to right, in eight-port groups from 0 to 39, as illustrated in Figure 3.


Brocade 5100 ISL Trunking
As mentioned above, the Brocade 5100 can benefit from the trunking features which optimizes the use of bandwidth by allowing a group of ISL to merge into a single logical link. As we know, when ISL configured, there are certain issues like congestion. The congestion of Fibre channel links will eventually lead to performance issue and severe production impact. In this case, ISL trunking is an ideal solution to solve this issue.
As Figure 4 shown, when two switches get connected, there is a ISL link and the network traffic starts to flow through this link to the other switch. Without trunking, the congestion caused in the ISL which resulted in frames loss and bandwidth waste.
Using ISL trunking configurations, shown as Figure 5 (a), at 2Gbps speeds, the trunking delivers ISL throughput of up to 8 Gbps, avoiding the ISL congestion at the same time. In the same way, using 4 Gbps with 8 trunks can reach up to 32 Gbps, as Figure 5 (b) displayed.


Transceiver Options for Brocade 5100
Cable runs require transceivers at each end in SAN. In the SAN with Brocade Fibre Channel switches, Fibre Channel transceivers are used. Since the Brocade 5100 can support 1/2/4/8Gbps Fibre Channel, the transceiver options for Brocade 5100 are available in 1G, 2G, 4G and 8G Fibre Channel transceiver modules. Among these options, the transceivers with the data rate of 2, 4 and 8 Gbps are most commonly used in today’s Fibre Channel deployment. In addition, you can select either single-mode or multimode implementations by using the corresponding optics.
The following table shows the 2/4/8G transceiver modules that are available in infiberone.com. With strict coding technology and test assurance, these transceiver modules are highly compatible with Brocade and can achieve high performance in your Brocade 5100 switch in a cost-saving manner.

2017年3月13日星期一

How To Clean The Recommendation for MPO MTP Connectors

MPO/MTP connectors are common throughout the high-density network today, giving us the power to add, drop, move and change the network. Thus, inspection and cleaning are very important for them since that issues with connector cleanliness and contamination are the greatest cause of network failure. However, you may find that you cannot get the expected result even though you have already cleaned the MPO/MTP connector before connection. Why? Keep reading this post, you may find out what the trouble is and how to solve it.


Understanding MPO/MTP Connector
MPO/MTP connector is the most common multi-fiber connector type used in today’s high-density networks, e.g. 40/100 Gigabit Ethernet. It usually contains one or two rows of fibers (12-fiber MPO/MTP or 24-fiber MPO/MTP) in a single connector. Compared to the single-fiber connectors, a MPO or MTP connector has a larger contact area (Figure 1), and alignment of the fibers is achieved by the connection of male connector (pinned connector) which has outer pins and female connector (unpinned connector) which has alignment holes (Figure 2).

When cleaning a MPO/MTP connector, all fibers on the connector must be clean for it to function properly. Because contamination of one fiber can cause signal degradation on other fibers. Additionally, due to the presence of the alignment pins, the cleaning of the extreme sides of the MPO/MTP connector end-face is often overlooked by users (Figure 3). This is also why we cannot get the expected result in spite of repetitive cleaning. For these reasons, we should choose the right cleaning method and tools for proper cleaning.


Cleaning Method—Dry or Wet?
Inspection should be done first before cleaning as it can decide if you need to clean. Once cleaning is required, dry cleaning which is an efficient method to remove dusts and finger grease is usually the preferred method to use due to the possibilities of residue when using alcohol based products.

However, dry cleaning method is not always sufficient to completely remove all contaminants. Thus, if the second inspection reveals that the MPO/MTP connector is still contaminated after the first dry cleaning, wet+dry cleaning method (Figure 4) is recommended to use for second cleaning. If the connector is still contaminated after second cleaning using wet+dry method, you could try to redo it once more. But in this case, permanent damage of the connector must be excluded. Once permanent damage is detected, the connector has to be replaced.

The one-click MPO/MTP cleaner (Figure 6) is an easy-to-use cleaning tool for MPO/MTP accessible connector and adapter cleaning. If connector and adapter are both required to clean in your system, it is a good choice for you. Just with a simple “one-click”, the cleaning is done. A one-click MPO/MTP cleaner can be used up to 600 cleans.


In addition to the cleaner, other cleaning accessories such as lint-free wipe, optical grade dust remover, lint-free swab, etc. are necessary to achieve dry or wet+dry cleaning.

Conclusion
Fiber optic cleaning is a key part in whole fiber optic systems. MPO/MTP connector is more susceptible to contamination due to its larger contact area and multiple fiber design. Thus, choosing a right cleaning method and cleaning tool is very important for MPO/MTP cleaning. This post recommended cleaning methods and tools for MPO/MTP cleaning. All the products mentioned above can be ordered in our on-line shop www.infiberone.com. Please visit the website or contact us for more information.

More Optical Transceivers Knowledge: www.infiberone.com/Plate_49.html

2017年3月1日星期三

Fiber Patch Panels Used in Data Center Interconnection Structured Cabling solution

To facilitate Data Center Interconnection structured cabling, intermediate link connections are usually made at patch panels to accommodate reconfigurations. In a structured cabling, all switches, servers and storage throughout the data center are represented by individual ports on the front of the patch panels in a centralized patching location often called the main distribution area (MDA). Connecting two ports is accomplished by a simple patch cord on the front side of the patch panels at the MDA, allowing for instant device to device connectivity.


Common Fiber Patch Panels Used in Data Center Interconnection
Structured cabling is the key to cable plant that is easy to document, manage, and grow with the current and future demands of data center connections. Three most common fiber patch panels used in structured cabling are LC adapter panels, MTP to LC cassettes, Cloud Optical Transceivers, Active Optical Cables, Direct Attach Cables and MTP adapter panels.

LC Adapter Panel – This type of patch panel module is also known as an LC-LC module and requires trunk cables with LC termination. The LC adapter panel offers the lowest connector loss of any of the patch panel modules.

MTP-LC Module – This patch panel module is also called an MTP to LC cassette and converts MTP trunk cables to LC connections. This module type has LC connectors in front and MTP connectors in back.


MTP Adapter Panel – This patch panel module supports MTP trunk cables and each MTP connection supports 8-12 fibers. The MTP adapter panel can easily support 12 MTP connections and 144 fibers or more.
Fiber Patch Panels Connections in Data Center Interconnection
In the 1 rack unit (1RU) patch panel drawn in figure below, LC adapter panel, MTP-LC module and MTP adapter panel are supported. These three types of patch panels support trunk cables terminated with MPO or LC connections. The trunk cables plug in the back of the patch panels and LC or MPO patch cords connect to the front of the patch panel. This modular patch panel architecture enables easy installation and scales well. With standard LC interfaces, this modular patch panel architecture supports 36 LC connections in a 1U patch panel. A 42RU rack full of these patch panel modules can support over one thousand fiber optic ports (42X36 = 1,512 LC ports).

Fiber Patch Panels Applications in Data Center Interconnection
Data centers often use four patch panel links that have two trunk cables radiate out from the patch panels in the MDA (shown in the figure below). In this case, each end of a trunk cable terminates in a patch panel, so four patch panels are associated with a link that has two trunk cables in it. Two of the patch panels are located in the MDA to connect any port to any port. One patch cord is needed in the MDA to connect the two trunk cables and another patch cord is needed on each end of the link to connect to the optical modules. This four fiber patch panel link has two trunk cables, three patch cords and four patch panels in all.


Conclusion
Fiber optic links are used to connect thousands of ports in massive data centers. Most data center links use MMF and support links with 2 trunk cables and four patch panels. In large deployments, more connections in more patch panels are also needed in a link and the insertion loss and link length must be managed. As the most three common patch panels used in data centers, LC adapter panels, MTP to LC cassettes and MTP adapter panels play a crucial role in structured cabling deployment. All these three patch panels are provided in INFIBERONE.COM with high quality and low price. For more details, welcome to visit www.infiberone.com or contact us over sales@infiberone.com.