Fiber Optic Networking

Share the information about fiber optic networking.

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Powering PoE Switch From A PoE Switch: Is It Possible?

PoE (Power Over Ethernet) technology supports power and data transmission over the same Ethernet cable, which makes the cabling easier and greatly saves the space. Characterized by this advantage, PoE switch gains the popularity among many users. In practical application, we may meet some emergency, such as power failure. At this time, is powering PoE switch from a PoE switch possible? This article will discuss this topic.

Working Principe of PoE Switch

Before we come to the answer of powering PoE switch from a PoE switch, let’s learn about working principle of PoE switch. A whole PoE system consists of Powering Sourcing Equipment (PSE) and Power Device (PD). PoE switch is a type of PSE device. The PSE device not only powers Ethernet client devices, but also manage the entire Power over Ethernet process. While the PD device is PSE load which receives power, or we can call it PoE system client. The working principle pf PoE switch can be divided into five steps.

Detection: PoE switch outputs very small voltage on the port, until it detects that the PD equipment connected to the cable end supports the IEEE802.3af standard.

PD Classification: After detecting the PD, PoE switch may classify PD equipment, and assess the power loss of PD equipment.

Begin to Supply Power: In a configurable time (usually less than 15μs) start-up period, PoE switch begin to power PD equipment with low voltage, until it provides 48V DC power supply.

Power Supply: PoE switch provide stable and reliable 48V DC power for PD equipment to meet the power consumption which is less than 15.4W.

Power Off: If the PD equipment is disconnected from the network, the PoE switch will stop powering the PD equipment quickly, generally within 300-400ms, and repeat to detect whether the end of the cable is connected to the PD equipment.

Powering PoE Device From A PoE Switch

PoE switch is self-adaptive. When the PSE has the power supply requirement, the PD will output the voltage to the PSE. This means the switch can be powered by PoE while simultaneously providing power by PoE to other devices such as IP phones or wireless access points. This provides great flexibility because it means that the switch can be deployed without the constraints of an AC power outlet. As for powering PoE switch from a PoE switch, Universal PoE (UPOE) technology will be required and the following part will talk about UPOE. The following figure shows the evolution of PoE technology.

Powering PoE Switch From A PoE Switch with UPOE Technology

UPOE technology is a new innovation from Cisco Systems which happens to the industry’s first 60-watt Power over Ethernet technology. It can offer twice the power per port of the switch—providing both power and network access to a greater range of devices through a single standard Ethernet cable. This can surely help to lower the total cost of IT operations. By using UPOE technology, powering PoE switch from a PoE switch is possible. Here is an example to help you have a better understanding of this.

Most major networking vendors provide PoE Passthru, but they all require using higher powered sources. It physically would be impossible otherwise. If X is the power provided to the switch and Y is the power the switch uses, then Z is the power available for PoE devices. Then X - Y = Z. If you want Z to meet the PoE specification, then X has to be at least: Z + Y which means your input power needs to be UPOE.

Conclusion

As the enterprise workspace evolves with more and more end devices for communication, collaboration, security, and productivity, the need of PoE is also evolving to support newer end devices with increased power requirements. Regarded as upgrade of PoE, UPOE technology doubles the power delivered per port over PoE+ to 60 Watts which can extend resilient network power to a broad range of devices. What’s more, it realizes powering PoE switch from a PoE switch.

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Introduction to 48 Port Gigabit SFP Switch

As we all know, data center cabling system consists of multiple devices, such as fiber optic transceiver, fiber optic patch cable, fiber patch panel, cable manager, and so on. As the central nerve of the whole cabling system, gigabit switch has been a topic of discussion. To satisfy different sizes of networking deployment, there are various types of Ethernet switches. This article will introduce a kind of 48 port gigabit SFP switch.

Overview of 48 Port Gigabit SFP Switch

FS.COM S5800-48F4S switch is a 48 port gigabit switch with 10gb uplink. It has 48×1GbE SFP ports and 4×10GbE SFP+ ports in a compact 1RU form factor. The switching capacity of this 48 port switch is 176 Gbps and its non-blocking bandwidth is 88 Gbps. And this gigabit switch can provide 130.95 Mpps. Meanwhile, FS.COM S5800-48F4S switch has 2 (1+1 redundancy) hot-swap power supplies and 4 (N+1 redundancy) hot-swappable fans. It is also a low latency L2/L3 Ethernet switch with 2.3us latency. The price of this 48 port gigabit switch with 10gb uplink is US$ 1,699.00. Here is a figure for you which shows front and back panel overview of FS.COM S5800-48F4S 48 port gigabit SFP switch.

Highlights of 48 Port Gigabit SFP Switch

The S5800-48F4S 48 port gigabit SFP switch with 10GE SFP+ uplinks comes with the complete system software with comprehensive protocols and applications to facilitate the rapid service deployment and management for both traditional L2/L3/MPLS networks. With support for advanced features, including MLAG, SFLOW, SNMP etc, this switch is ideal for traditional or fully virtualized data center. The S5800-48F4S hardware also provides high-availability features, including pluggable redundant fans and using high quality electronic components, which ensures low power consumption.

Applications of 48 Port Gigabit SFP Switch

Designed with 48×1GbE SFP ports and 4×10GbE SFP+ ports, FS.COM S5800-48F4S 48 port gigabit SFP switch can accomplish N×1G to N×1G (N≤48) connection or N×10G to N×10G (N≤4) connection. For example, in 5G to 5G connection, on one side, five 1G SFP transceivers are plugged into SFP ports on S5800-48F4S switch; on the other side, another five 1G SFP transceiver modules are plugged into SFP ports on switch, too. Then, these five SFP optical transceivers are connected by five fiber optic cables. It should be noted that the transceivers and fiber patch cables used in the link are of the same type.

Conclusion

As the size of data center becomes larger and larger, cable density increases, too. To simplify the cabling, many data center managers prefer network switch with high density ports. The above 48 port gigabit SFP switch with 10GE SFP+ uplinks is a suitable choice for high density cabling.

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A Closer Look at 100G Switch Market

To keep up with growing enterprise networks, transmission speeds and expansions in data center capacities are constantly changing, from 1G, 10G, 40G to 100G. And obviously, 100G will become the mainstream. It is said that by 2019, 100G Ethernet will make up more than 50 percent of data center fiber optic transmissions. To smoothly migrate to 100G Ethernet, 100G switch plays an important role. This article will guide you to have a closer look at 100G switch market and introduce several 100G switches.

100G Switch Market Option 1: FS.COM N8500-32C 100G Switch

The FS.COM N8500-32C switch is a 32 port 100G switch. It has 32 100GbE QSFP28 ports and can achieve 6.4 Tbps full-duplex switching capability. In addition, FS.COM N8500-32C 100G switch uses Broadcom ICOS as its operating system. Designed in a compact 1U form factor, it is ideally suited for high performance and programmable data center environments. As a 100G ToR switch, FS.COM N8500-32C 100G Ethernet switch provides line-rate, high-bandwidth switching, filtering, and traffic queuing without delaying data. Redundant power and fans along with numerous high availability features ensure that N8500-32C is always available for business-sensitive traffic. With support for advanced features, including MLAG, VxLAN, SFLOW, SNMP, MPLS etc, FS.COM N8500-32C switch is a good choice for traditional or fully virtualized data center. This 100G switch price is US$ 9,199.00.

100G Switch Market Option 2: Dell S6100-ON 100G Switch

Dell Networking S6100-ON Switch is a 2RU high-density 10/25/40/50/100GbE fixed switch with choice of up to 32 ports of 100GbE (QSFP28), 64 ports of 50GbE (QSFP28), 64 ports of 40GbE (QSFP+), 128 ports of 25GbE (SFP28) or 128 ports of 10GbE (using breakout cable) and two fixed SFP+ ports of 10GbE/1GbE/100MbE. It provides up to 6.4 Tbps of switching I/O bandwidth (full duplex) and non-blocking switching fabric delivering line-rate performance under full load with sub usec latency. Dell Networking S6100-ON 100G switch supports Dell EMC Networking’s Open Automation Framework, providing enhanced network automation and virtualization capabilities for virtual data center environments. It is a 100G ToR switch which can provide high-density 10/25/40/50/100GbE ToR server aggregation in high-performance data center environments. This 100G switch price is US $4,717.65.

100G Switch Market Option 3: Broadcom StrataXGS Tomahawk II 100G Switch

Broadcom StrataXGS Tomahawk II switch was released on October, 2016. It supports up to 64 ports 100GE or 128 ports of 40GE/50GE with SDN-optimized packet switch engines operating at 6.4 Terabits per second. The StrataXGS Tomahawk II offers increased bandwidth capacity, scalability, and cost efficiency for mega data centers and high performance computing (HPC) environments. Manufactured in 16nm, Tomahawk II integrates 256 serdes running at over 25 Gbps, with large on-chip forwarding tables and packet buffer memory. With next generation BroadView instrumentation and control capabilities, Tomahawk II provides enhanced traffic load balancing, network visibility and control of traffic provisioning. Tomahawk II’s proven architecture and comprehensive feature-set will enable partners to develop and deploy solutions more quickly, accelerating the transition to high density 100GE interconnect.

100G Switch Market Option 4: HPE FlexFabric 5950 32QSFP28 Switch (JH321A)

The HPE FlexFabric 5950 32QSFP28 switch is a 32 port 100G switch whivh provides advanced features and high performance in a top-of-rack, data center switch architecture. It has 32 QSFP28 and 2 SFP+ ports, dual hot-pluggable power supplies and six fan trays. In addition, it can provide up to 3.2 Tbps switching capacity. This 100G ToR switch utilizes intelligent Resilient Fabric (IRF) technology which simplifies the architecture of server access networks. With ultra-low-latency, HPE FlexFabric 5950 32QSFP28 switch is ideally suited for deployment at the spine and server access layer in large enterprise data centers. This 100G switch price is US $17,037.99.

Conclusion

The telecom industry develops rapidly and higher bandwidth networking is a trend. The 100G Ethernet’s time will come soon and 100G switch market gradually receives much attention. This article introduce several kinds of 100G Ethernet switches and I hope it can help you choose a best network switch for your 100G networking.

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Gigabit Switch Review: Ethernet Switches Recommendations

Ethernet switches, also known as network switches, serve as the brain of the whole network, especially for data center. On the market, there are various types of Ethernet switches which are designed for different requirements, such as port number, speed, managed or unmanaged. Faced with so many choices, you may get confused about which one is the best switch. In fact, not just you, there are a lot of people who don’t know how to make the choice. In the year 2017, Gigabit switch has been the hot topic at several big forums, and the question “Can you recommend a Gigabit switch for me?” frequently occurred. This article will focus on Gigabit switch review and recommend several Ethernet switches for you.

Gigabit Switch Review 1: D-Link DGS-1008G Gigabit Switch

D-Link DGS-1008G Gigabit switch has eight gigabit ports and boasts data transfer speeds of up to 2000 Mbps. It comes with QoS features, which automatically organize and prioritize important and time-sensitive data packets, ensuring efficient delivery. This feature helps enable smoother media streaming, VoIP calling and online gaming features. In addition, it utilizes D-Link’s Green Technology which allows the switch to reduce heat and use less energy. D-Link DGS-1008G Gigabit switch is a solid choice if you are looking for a fast, easy-to-use and reliable network switch.

Gigabit Switch Review 2: FS S5800-8TF12S Managed Switch

FS S5800-8TF12S switch is a 12 port smart managed switch. It is designed with twelve 10G SFP+ ports and eight 1000BASE-T/ SFP combo ports. The 1000BASE-T copper RJ45 ports support Gigabit speeds over Cat6 cable up to 100 meters, and the 1G SFP fiber ports can be connected to other devices via SFP transceivers over fiber optic cable. FS S5800-8TF12S 12 port smart managed switch is designed to support a demanding and dynamic environment of SMB networks. It is a good choice for 10G access Layer switch for hyper-converged infrastructure.

Gigabit Switch Review 3: UniFi US-24-500W PoE Switch

UniFi US-24-500W switch is a 24 port PoE switch which comes with 24 Gigabit RJ45 ports and 2 SFP ports. Its non-blocking throughput is up to 26 Gbps and the switching capacity is up to 52 Gbps. UniFi US-24-500W PoE switchh is a fully managed Gigabit switch which can deliver robust performance and intelligent switching for networks. Besides, it offers the forwarding capacity to simultaneously process traffic on all ports at line rate without any packet loss. It is really a cost-effective PoE switch at $399.00.

Gigabit Switch Review 4: FS S5850-48T4Q 10GBASE-T Switch

FS S5850-48T4Q 10GBASE-T copper switch is a 1U managed L2/L3 Ethernet switch. It has forty-eight 10GBASE-T RJ45 ports and four 40G QSFP+ ports. And it can provide 1.28Tbps switching capacity. FS S5850-48T4Q switch is designed to meet next generation Metro, Data Center and Enterprise network requirements. For example, it can be used for Spine-Leaf network which is a popular architecture design for data center. For 1GBASE-T copper switch at lower cost, FS S5850-48T4Q switch is a great option to help you migrate to 10GbE network.

Conclusion

The above content Gigabit switch review has recommend 8 port unmanaged Gigabit switch, 12 port 10G smart managed switch, 24 port PoE switch and 48 port 10GBASE-T copper switch. All of them are good choices when compared with the same type of Ethernet switches. I hope this article can help you choose the best switch when you feel confused.

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56G QSFP+ DAC Vs. 40G QSFP+ DAC

High speed data transmission is the prerequisite for enterprise network deployment. For big data centers, 40G is still the mainstream. For 40G network, 40 gbps transceiver and 40gb ethernet cable are important components, and they can be classified according to transmission distance. For long transmission distance, there are 40G LR4 QSFP+ transceiver and singlemode fiber cable; for short transmission distance, there are 40G SR4 QSFP+ transmission and multimode fiber cable. In addition, for 40G short link, there is QSFP+ DAC cable. Two types of QSFP+ DAC cables are available on the market: 56G QSFP+ DAC vs. 40G QSFP+ DAC, what’s the difference between them? This article will make a comparison.

56G QSFP+ DAC Vs. 40G QSFP+ DAC: Same construction

We know that DAC cable is a kind of high speed passive copper cable with one connector on each end. The connectors are not real optical transceiver modules but in the form of optical transceiver module. DAC twinax cable Therefore, QSFP+ DAC consists of two QSFP+ transceiver style connectors and one twinax copper cable. With the same construction, the operation of 56G QSFP+ DAC and 40G QSFP+ DAC in 40G network deployment is the same, too. Just plug the connector into 40G QSFP+ port on the switch on both sides, and then you can get 40G link. Here is a figure of QSFP+ DAC cable for you.

56G QSFP+ DAC Vs. 40G QSFP+ DAC: Different protocols

As qsfp+ passive copper cable, both 56G QSFP+ DAC and 40G QSFP+ DAC are QSFP MSA compliant. But 40G QSFP+ DAC supports 40G InfiniBand 8x DDR, 4x QDR, 10G/40Gigabit Ethernet, Fibre Channel, while 56G QSFP+ DAC supports 40G InfiniBand 4x FDR, 56Gigabit Ethernet, Fibre Channel. What’s the different between InfiniBand DDR, QDR and FDR? InfiniBand (abbreviated IB) is a computer-networking communications standard used in high-performance computing that features very high throughput and very low latency. It is used for data interconnect both among and within computers. InfiniBand is also used as either a direct or switched interconnect between servers and storage systems, as well as an interconnect between storage systems. And the following figure shows InfiniBand specification. We know that QSFP+ DAC cable uses four channels for data transmission. And for 40G QSFP+ DAC, it supports 40G InfiniBand 8x DDR, 4x QDR, so each channel can achieve 10G data rate; for 56G QSFP+ DAC, it supports 40G InfiniBand 4x FDR, so the maximum data rate of each channel is 14G.

Conclusion

Characterized by low Insertion loss and power consumption, qsfp+ passive copper cable is a cost-effective option for 40G data transmission over short distance. As for 56G QSFP+ DAC vs. 40G QSFP+ DAC, the only different is that the former can operate high bandwidth than the latter one. Therefore, if your network needs 40G data transmission, then 40G QSFP+ DAC cable; if you need more than 40G bandwidth, then choose 56G QSFP+ DAC.

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Practical Use of PoE Technology

Now power over Ethernet switch gains great popularity among many users which utilizes PoE technology. But still some people know little about PoE technology. This article will focus on practical use of PoE technology.

Practical Use of PoE Technology: PoE switch and PoE-compatible Devices

When connected with other network devices, PoE switch will detect whether they are PoE-compatible devices and enable power automatically. Therefore, it is the simplest solution to add PoE to your network by using PoE switch and PoE-compatible devices.

Practical Use of PoE Technology: Non-PoE switch and PoE-compatible Devices

Non-PoE switch can support PoE function when connected to PoE injector by a network cable. Then PoE-compatible devices are connected to PoE injector. The whole cabling solution is completed. It is not hard to see PoE injector can be used to upgrade existing LAN installations to PoE, especially when fewer PoE ports are required.

Practical Use of PoE Technology: PoE switch and Non-PoE Devices

In this cabling solution, PoE switch has to be connected to PoE splitter which separates the data and power transmission. The PoE splitter has two output lines, one is the power output line and the other is network data signal output line. For example, you need one cat5e ethernet cable to connect PoE switch with PoE splitter, another one cat5e ethernet cable to connect PoE splitter with non-PoE device. In addition, you have to add power cable between PoE splitter and non-PoE device. Finally, the whole deployment will work.

Practical Use of PoE Technology: Non-PoE switch and Non-PoE Devices

Both PoE injector and PoE splitter are used in this cabling solution. PoE switch connects to the PoE injector, then the PoE splitter, and finally transmits to non-PoE devices. In fact, this solution makes cabling more complicated. But if you need, you can do it.

Note: To help you have a better understanding of practical use of PoE technology, the above four cabling solutions are shown in the following figure.

Conclusion

PoE technology can support data and power transmission over one network cable at the same time, which simplifies the cabling process. I hope after reading this article, you can know more about practical use of PoE technology. What’s more, before you plan to use PoE, choosing quality and cheap PoE switch and network cable is important, or you may get poor network performance.

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8 Port PoE Switch Recommendations

As more and more network devices are deployed in networking, the cabling becomes complicated. PoE technology, which support power and data transmission over an Ethernet cable at the same time, can simplify the cabling. And recently, 8 port PoE switch is popular with many users. This article will recommend several 8 port PoE switches for you.

8 Port PoE Switch Recommendation 1—UniFi US-8-150W Switch

UniFi US-8-150W 8 port PoE switch is a managed switch which has 8 RJ45 ports and 2 SFP ports. The RJ45 ports support 10/100/1000 Ethernet connections and PoE/PoE+ functions; the hot-swappable SFP ports support 1 Gbps connections. Besides, there is a reset button on UniFi US-8-150W switch which serves two functions for the UniFi switch: restart and restore to factory default settings. For PoE/PoE+ function, by default, PoE settings for ports are set to auto-sensing PoE+. PoE will automatically be activated on the port when an 802.3af/at device is connected. The maximum power consumption of UniFi US-8-150W switch is 150W. The price is about $199.00.

8 Port PoE Switch Recommendation 2—D-Link DGS-1210-10P Switch

D-Link DGS-1210-10P 8 port PoE switch is one member of DGS-1210 series family which are the latest generation of switches to provide PoE/PoE+ capabilities, making deployment easier. Also, it support a complete lineup of L2 features, including IGMP snooping, port mirroring, Spanning Tree Protocol (STP), and Link Aggregation Control Protocol (LACP). The D-Link DGS-1210-10P switch has eight 10/100/1000 ports and two 100/1000 SFP ports. Its switching capacity is 20 Gbps and maximum power consumption is 81.9W. The price is about $133.91.

8 Port PoE Switch Recommendation 3—TP-Link TL-SG2210P Switch

TP-Link TL-SG2210P 8 port PoE switch is equipped with 8 gigabit RJ45 ports and 2 SFP slots. And all RJ45 ports support IEEE 802.3af-compliant PoE with total power supply of 53W to power any 802.3af compliant power device. The switch provides high performance, enterprise-level QoS, useful security strategies and rich layer 2 management features. The maximum power consumption of TP-Link TL-SG2210P switch is 63.4W. It is especially designed for the small and medium business networks that require efficient network management. The price is about $131.37.

8 Port PoE Switch Recommendation 4—Netgear GS110TP Switch

Netgear GS110TP 8 port PoE switch has eight 10/100/1000 Mbps copper ports and two Gigabit SFP ports. With PoE function on eight copper ports, Netgear GS110TP switch is capable of delivering up to 15.4W of power per port, up to a maximum total of 46W across all connected PoE devices. The maximum power consumption is 59.3W. in addition, the switch comes with a comprehensive set of features, such as L2 features, enhanced VLAN and QoS, access control lists (ACL), and so on. The price is about $169.99.

8 Port PoE Switch Recommendation 5—FS S1130-8T2F Switch

FS S1130-8T2F managed 8 port PoE+ switch has eight 10/100/1000Base-T RJ45 Ethernet ports, one console port, and two gigabit SFP slots. It is compliant with IEEE 802.3af/at and can supply power to PoE network equipment. The FS S1130-8T2F switch is fanless switch and it features superior performance in stability, environmental adaptability. The maximum power consumption is 130W. The price is about $159.00.

Which One to Choose?

From the above 8 port PoE switch recommendations, we can clearly see that all these five switch have similarities and differences. For example, all of them support PoE function, but UniFi US-8-150W, D-Link DGS-1210-10P and FS S1130-8T2F support both PoE and PoE+ standard; all of them have 8 RJ45 port and 2 SFP ports, but their maximum power consumption are different. Which one to choose really depends on your specific requirements. If you need to use PoE devices with larger power consumption, UniFi US-8-150W and FS S1130-8T2F switch are good options; if your budget is tight, you can choose D-Link DGS-1210-10P, TP-Link TL-SG2210P and FS S1130-8T2F switch according to the above 8 port switch price. From the comparison, we can conclude that FS S1130-8T2F switch is a cost-effective solution which can supply higher power at lower price. I hope this article—8 port PoE switch recommendations will help you choose a suitable 8 port PoE switch for your network deployment.

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PoE Switch Vs. PoE Injector: Which One to Choose?

Network has become an essential part of our daily life. To make life easier, there are various types of network devices on the market, such as such as IP phone, wireless access point and IP camera. Each of them not only has to get access to the network through the Ethernet cable, but also needs power supply via power cord. When the number of devices is a little more, the cabling will be complicated. How to solve this problem? Recently, PoE (Power over Ethernet) technology is popular, which can transmit both power and data through an Ethernet cable at the same time. When it comes to PoE, there are two hot devices: PoE switch and PoE injector. And people often ask: PoE switch vs. PoE injector: which one to choose? This article will make a comparison between them and help you make the choice.

What is PoE Switch?

PoE switch is a network switch that has Power over Ethernet injection built-in. When connected with other network devices, PoE switch will detect whether they are PoE-compatible and enable power automatically. Therefore, it is a simple solution to add PoE to your network by using PoE switch. In addition, there is PoE+ switch available on the market. PoE switch utilizes the original PoE standard, IEEE 802.3af, which provides up to 15.4W of DC power to each device. While PoE+ switch use the latest PoE+ standard, IEEE 802.3at, also known as PoE class 4, which provides up to 30W of power to each device. That’s to say PoE+ switch can provide almost twice as much power as PoE switch. The following figure shows a 8-port PoE switch which is popular among many users.

What is PoE Injector?

PoE injector is used to add PoE capability to regular non-PoE network links. The following figure shows the application of PoE injector. Both PoE injector and non-PoE Ethernet switch are powered on. Then they are connected by an Ethernet cable. By doing this, the PoE-compatible IP phone, wireless access point and IP camera can work through one Ethernet cable respectively connected to PoE injector. In network deployment, PoE injector can provide a versatile solution when fewer PoE ports are required.

PoE Switch Vs. PoE Injector: Which One to Choose?

PoE switch is all-in-one box with no additional appliance and the ports on it can be used to manage both network and power. While PoE injector can be added onto existing networks with no need to change the switch and is easy to mount anywhere. As for which one to choose, it really depends on the specific requirement. For example:

If you only have a few things to power, then PoE injectors are good. The cost is lower when compared to a PoE switch.

If the PoE goes out in a PoE switch, all PoE has the chance of going out. But if a PoE injector goes out, it only affects one device.

If you do have to replace a PoE injector, you can just replace the bad injector without any production downtime anywhere else in the network.

Conclusion

Both PoE switch and PoE injector utilize PoE technology which makes network deployment even simpler and have their own advantages. It is important to figure out what you need before you make a choice between them. What’s more, please ensure your device supports PoE before connecting into a PoE-enabled network.

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Smart Managed Switch Vs. Unmanaged Switch

Network switch, a box-shaped device, plays an important role in a network deployment. To achieve high network performance, a suitable switch is required. There are smart managed switch and unmanaged switch on the market. How much do you know about them? Smart managed switch vs. unmanaged switch, which one should you choose for your network deployment? Keep reading, and you will find the answer.

Smart Switch Vs. Managed Switch

If you look through the official website of several vendors, you may find that some offer smart switch, the others provide managed switch. Smart switch vs. managed switch, what’s the different between them? Smart switch has some features that managed switch has, but are more limited. Besides, smart switch is cheaper than managed switch. So, it’s a cost-effective alternative to managed switch. In fact, "smart switch" and "managed switch" are terms invented by vendors. And the exact meaning may vary from vendor to vendor. To some extent, smart switch and managed switch are virtually the same. In the following part, I combine them as smart managed switch for easy reading.

Smart Managed Switch Vs. Unmanaged Switch

As smart managed switch and unmanaged switch have different features, they are used in different applications.

Smarted Managed Switch

Smart managed switch offers features like QoS (Quality of Service), Simple Network Management Protocol (SNMP), command line interface (CLI), Rapid Spanning Tree Protocol (RSTP), redundancy capability, VLANs, LACP and so on. The greatest advantage of smart managed switch is that you can change the configuration of the switch to satisfy your specific networking needs. Smart managed switch is especially suitable for enterprises that need to manage and troubleshoot their network remotely and securely, allowing network managers to monitor and control the traffic to achieve optimal network performance and reliability. The following figure shows FS S5800-8TF12S managed switch which provides high port density with 8-port 1GbE RJ45 and 8-port 1GbE SFP combo and 12-port 10GbE uplink in a compact 1RU form factor.

FS S5800-8TF12S managed switch

Unmanaged Switch

Unmanaged switch is basic plug-and-play switch with no remote configuration, management, or monitoring options. It allows Ethernet devices to communicate with one another (such as a PC or network printer) by providing a connection to the network and passing on information to where it needs to go. Therefore, unmanaged switch is usually used to extend the number of Ethernet ports. Unmanaged switch can be desktop or rack mounted. It is less expensive than smart managed switch and is suitable for home use, SOHO and small businesses.

Which One to Choose?

From the above content, we can conclude that smart managed switch vs. unmanaged switch, the biggest difference between them is the configuration feature. As for which one to choose, it really depends on your need. If you just want to set up a home network or add more Ethernet ports, unmanaged switch is good enough. If you need configuration options like VLAN and QoS, you will have to use smart managed switch.

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A Closer Look at Fanless Switch

If your laptop has built-in fan, you must have gone through such experience: when your laptop has been working for a long time, it will be heating. Then, you may start the fan to cool your laptop down. However, there will be noise. So does network switch. Compared with other optical components, network switch is larger. And ongoing work will cause overheating. Therefore, many network switches are designed with fans and very noisy. Is there any solution that is the best of both worlds? The answer is “Yes”. Fanless switch can do this. This article will guide you have a closer look at fanless switch.

Overview of Fanless Switch

Taken literally, fanless switch does not have any fans built into it, thus it has a quiet operation. But how is it cooled down? In fact, engineers employ passive cooling system for fanless switch to transfer heat. The passive cooling system achieves high levels of natural convection and heat dissipation by utilizing a heat spreader or a heat sink to maximize the radiation and convection heat transfer modes. Therefore, it can provide energy efficiency and lower financial cost. With passive cooling system, fanless switch is a cost-effective and energy-efficient solution that maintains optimal operating temperature without causing much noise.

While fan switch utilizes active cooling system which refers to cooling technologies that rely on an external device to enhance heat transfer. Through active cooling system, the rate of fluid flow increases during convection, which dramatically increases the rate of heat removal. Apart from the unpleasant noise, the main disadvantage of active cooling system is that it requires larger power consumption and costs more than passive cooling system.

FS 8-Port Gigabit PoE Fanless Switch

FS 8-port Gigabit PoE fanless switch is designed with 8x 10/100/1000BASE-T RJ45 Ethernet ports, 1x console port, and 2x gigabit SFP slots. It has Layer2+ switching features and the switching capacity is 20Gbps. This 8-port fanless switch also support PoE function. It can supply power to network equipment such as weather-proof IP cameras with windshield wiper and heater, high-performance access point and IP telephone. The max power consumption of this managed PoE switch is 130W. In addition, this fanless switch has Mini body. Whether it is in the data room, office, or installed to other places, it can save you more space and make networking more convenient. To accomplish the link, you can use 100BASE SFP, 1000BASE SFP, BIDI SFP, CWDM SFP, DWDM SFP optical transceiver or 1000BASE-T SFP copper RJ-45 transceiver. FS.COM provides many high-quality compatible SFP modules for 8-port fanless switch. Here is a figure of FS 8-port Gigabit fanless switch for you.

Conclusion

Network switch has become an integral part of optical link, serving as the central system. But the noise is the main problem that many data center managers are faced with. To overcome this, silent fanless switch has already been available on the market. At FS.COM, small and medium-sized business can find reliable and affordable fanless switches. Like the above fanless switch, it is US $159.00. These switches are designed with high resistance to electromagnetic interference. They also features superior performance in stability, environmental adaptability. What’s more, they provide service like a one-year limited warranty, including any quality problems during the free maintenance. Besides, there are cheap and quality optical transceiver at FS.COM. And all of them are tested for 100% functionality and guaranteed compatible for outstanding network performance.

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Are You Ready For 400G Ethernet?

The rapid development in telecom industry is driving massive demand for higher bandwidth and faster data rate, from 10G to 40G and 100G, will this keep going on? The answer is definitely “Yes”. Some time ago, migration from 10G to 40G or 25G to 100G has been a hot spot among data center managers. While recently, 400G solutions and 400G components are coming. Are you ready for 400G? This article will share some information about 400G Ethernet.

Overview of 400G

In the past couple of years, modules with four 25/28G lanes or wavelengths are the solutions for 100G Ethernet. However, they were expensive at the beginning. Until 2016, the optical components industry has responded to the demands with 100G solutions that already cost less per gigabit than equivalent 10G and 40G solutions, and new developments to further drive down cost and increase bandwidths. The next generation is 400G Ethernet. The IEEE has agreed on PSM4 with four parallel fibers for the 500 meters 400GBASE-DR4 specification that is part of the IEEE802.3bs standard being developed for approval by the end of 2017. The industry is already developing optical components for 400G Ethernet solutions. The following figure shows telecom and datacom adoption timelines.

We can visually see that telecom/enterprise applications first adopted 100G technology in the form of CFP modules. Data centers generally did not adopt 100G interfaces until the technology matured and evolved towards denser, lower power interfaces, particularly in the form of QSFP28 modules. However, as the hyperscale data center market scales to keep pace with machine-to-machine communications needs, data center operators have become the first to demand transmission modules for data rates of 400G and beyond. Therefore, the 400G era is now upon us.

Modules for 400G

We know that the QSFP28 modules for 100G Ethernet and SFP28 modules for 25G Ethernet are now the dominant form factors. Though CFP, CFP2 and CFP4 modules remain important for some applications, they have been eclipsed by QSFP28 modules. To support higher bandwidth, what is the right module for 400G? The first CFP8 modules are already available. QSFP-DD is backward compatible with QSFP, and OSFP may deliver better performance, especially as networks move to 800G interfaces.

CFP8 module: CFP8 module is the newest form factor under development by members of the CFP multisource agreement (MSA). It is approximately the size of CFP2 module. As for bandwidth density, it respectively supports eight times and four times the bandwidth density of CFP and CFP2 module. The interface of CFP8 module has been generally specified to allow for 16 x 25 Gb/s and 8 x 50 Gb/s mode.

QSFP-DD module: QSFP-DD refers to Quad Small Form Factor Pluggable Double Density. It uses eight 25G lanes via NRZ modulation or eight 50G lanes via PAM4 modulation, which can support optical link of 200 Gbps or 400 Gbps aggregate. In addition, QSFP-DD module can enable up to 14.4 Tbps aggregate bandwidth in a single switch slot. As it is backwards compatible with QSFP modules, QSFP-DD provides flexibility for end users and system designers.

OSFP module: OSFP (Octal Small Form Factor Pluggable) with eight high speed electrical lanes is able to support 400G (8x50G). It is slightly wider and deeper than the QSFP but it still supports 36 OSFP ports per 1U front panel, enabling 14.4 Tbps per 1U. The OSFP is able to meet the projected thermal requirements for 800 Gbps optics when those systems and optics become available in the future.

Conclusion

Judging from the current trends, 400G will become the mainstream in the near future. But there are still some challenges for it to overcome, such as high capacity density, low power consumption, ever lower cost per bit, and reliable large-scale manufacturing capabilities. You never know what surprise the network will bring to you, let’s wait and see the 400G’s time.

Originally published at: http://www.fiber-optical-networking.com/are-you-ready-for-400g-ethernet.html

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Focus On FTTH Cabling Solution

Fiber optic cable has been widely used in telecom industry for its fast transmission speed. As people’s demand for bandwidth is increasing, optical fiber cable is not only used in enterprise network, but also applied to home network deployment. And FTTH (Fiber to the home) project is a typical example. This article will focus on FTTH cabling solution.

Overview of FTTH

FTTH refers to the installation and use of fiber optic cable all the way to individual buildings such as single family units (SFUs), multidwelling units (MDUs), providing high-speed broadband service. Take FTTH project in residential area for example, usually, the broadband service provider will set a distribution point near or inside a building. And fiber optic cables are deployed in this building to connect every required house to this fiber distribution point, thus providing broadband services to end users.

Advantages of FTTH

FTTH is an idea cabling solution for home network users who need high and reliable bandwidth for some applications, such as video chats and online conversation. In addition to this, is there any other advantage of FTTH?

FTTH is a passive network project which needs no active components, thus the cost of network installation and maintenance is not very high.

Fiber optic cable is light, so the installation process does not need much labor..

Fiber optic cable has high stability, and it will not be easily corroded by lightning or rain, or cause leakage.

Fiber optic cable can provide unlimited bandwidth. The development of technology leads to further expansion of people’s demand for bandwidth. For Ethernet cable, different categories have their own data rate limits and transmission distance limits. But for optical fiber cable, the bandwidth limit is up to how much bandwidth the broadband service provider offers.

FTTH project is a cost-effective cabling solution for present and future, since you have no need to worry about the upgrade for your cabling system.

FTTH project is designed with a lifespan of at least 30 years. Therefore, it is imperative that investments to the FTTH infrastructure are suitable for future needs.

Cable Options for FTTH

FTTH project is applied in many areas, such as indoor section, outdoor section. To fulfill the cabling requirements for different areas, different types of fiber optic cables are well developed.

Indoor cable: FTTH indoor cable is used inside a building or house to connect the FTTH user end equipment. Its fiber count typically is 1, 2 or 4 optical strands, commonly combined with two non-metal enhanced FRP/Metal/KFRP which can provide sufficient tensile strength and good resistance to lateral crushing to protect the fiber inside.

Drop cable: FTTH drop cable connects Network Access Point (NAP) to the subscriber premises. Drop cable contains only 1 or 2 fibers for the connecting circuitry and possibly additional fibers for backup or for other network architecture reasons. It is designed with attributes such as flexibility, less weight, smaller diameter, ease of fiber access and termination.

Distribution cable: Fiber distribution cable is ideal for applications requiring a single termination point with multiple fibers. It has a tight buffered design so it can be installed in intra-building backbone and inter-building campus locations without expensive transitions between cable types.

Conclusion

As a cost-effective cabling solution, it gains great popularity among people. So far, FTTH project has entered thousands of households. What’s more, it has been promoted as a national strategy. So, are you ready to embrace the benefits of FTTH project? FS.COM provides high quality fiber optic cables at low prices, such as single mode fiber and multimode fiber. Also, they provide custom service for fiber optic cabling.

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Comparison Between Managed Switch And Unmanaged Switch

As an important part of the whole data link, switch has been a hot spot. According to Ethernet standard, it can be divided into 1G switch, 10G switch, 40G switch and 100G switch; according to port configuration, it can be classified as 8 port switch, 16 port switch, 24 port switch and 48 port switch; according to PoE technology, there are PoE switch and non-PoE switch. But, do you know there are managed switch and unmanaged switch? This article will make a comparison between them.

Overview of Managed Switch And Unmanaged Switch

In a networking, a switch receives a message from any device connected to it and then transmits the message to the target device. Within a LAN, the switch can handle and transmit data among multiple devices via a intelligent and efficient way. As for managed switch and unmanaged switch, the key difference between them is that managed switch can be configured and it can prioritize LAN traffic to make the most important data get through; while unmanaged switch is a “plug and play” device. It can’t be configured or analyze the data traffic.

Comparison Between Managed Switch And Unmanaged Switch

Managed switch gives you better control over your LAN traffic and offers advanced features to control the traffic.

Managed switch has all the features of unmanaged switch and additionally has the ability to configure, manage, and monitor your LAN. So this helps you to monitor and decide who should have access to your network and gives you greater control over data flow through your network.

Unmanaged switch does not support any configuration interface and options. It is like plug and play device and you need to connect your computer or other network devices directly to the unmanaged switch. If there are no advanced applications needed, then unmanaged switches should be the best choice.

Managed switch uses protocols such as SNMP or Simple Network Management Protocol for monitoring the devices on the network, which helps in the exchange of management information between network devices.

Managed switch with Quality of Service (QoS) feature allows you to prioritize your network traffic by assigning a higher priority to the critical traffic. This helps to improve network performance and helps in better transmission of delay-sensitive data such as real-time voice.

Managed switch can be used to isolate traffic between different user groups. This segmentation and isolation of network traffic help to reduce unnecessary traffic. For instance, you can segregate traffic between your finance and marketing groups, so that critical finance information can flow without delay to the finance users and not get bogged down by marketing traffic. This allows better network performance and additional level of security.

Conclusion

When it comes to which one to choose, it is mostly about two things: budget and application. Managed switches are costlier than unmanaged switches. But managed switches definitely have more benefits and ensure improved, consistent network performance. Weighing the pros and cons of both the types of switches, each business needs to evaluate its network needs. If you just want to setup a network, unmanaged switches are good enough. If you need configuration options like like VLAN, QoS you will have to use a managed switch. FS.COM can provide quality managed switch, such as 8 port managed PoE/PoE+ switch, 24 port managed PoE/PoE+ switch.

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Focus On Fiber Optic Link Loss

We know that, no natter what component you use, there must insertion loss in your fiber optic cabling. Therefore, in order to make your fiber optic cabling system perform at high level, calculating the amount of insertion loss before cable plant is necessary. This article will focus on fiber optic link loss.

Overview of Link Loss And Link Loss Budget

The link loss and link loss budget are measured in dB. Link loss is the total insertion loss of all optical components in an optical network. While link loss budget is the amount of loss that a cable plant should have. It is calculated by adding the average losses of all the components used in the cable plant to get the total estimated end-to-end loss. The link loss budget has two important functions: during the design stage to ensure the cabling being designed will work with the links intended to be used over it and; after installation, comparing the calculated link loss to test results to ensure the cable plant is installed properly.

How to Calculate Link Loss?

Usually, the loss of four parts need to be calculated: mated pair connector loss, fiber optic splicing loss, fiber optic cable loss and other loss.

Mated Pair Connector—EIA/TIA 568 standard allows 0.75 max per connector

Connector or “connection” loss is the total loss of the mated pair connectors. It’s standard to assume a 0.3 dB loss for most ultras polished connectors. In order to measure the loss of the connectors, you must mate them with similar connectors, or you are likely to experience different losses. Also, a high quality connector is required when testing matted pairs.

Fiber Optic Splicing—EIA/TIA 568 max loss is 0.3 dB per splice

According to the Fiber Optic Association (FOA), multimode splices are commonly made using mechanical splices. Best construction practices dictate that even with multimode fiber fusion splicing is ideal. Both forms of splicing generally result in satisfactory results, however fusion splicing proves to be more reliable in adverse surroundings. Single mode fibers that have been fusion spliced will typically have less than 0.10 dB loss. A good average for a skilled installer is generally around 0.05 dB loss.

Fiber Optic Cable

EIA/TIA 568 spec for multimode fiber is 3.5 dB/ km at 850 nm and 1 .5 dB/km at 1310 nm. This specification translates into a loss of approximately 0.1 dB per 100 feet for 850 nm, 0.046. dB per 100 feet for 1300 nm. For example, 300 ft multimode fiber optic cable at 850 nm would approximately equal 0.3 dB loss. While for single mode fiber, the loss is 0.5 dB per km at 1310 nm, 0.4 dB per km for 1550 nm.

Other Loss—Passive Components and Margin

Don’t forget to count any other passive components you are using in your network. For example, if you are using splitters or filters, add the insertion loss for those components. In addition, it is recommended to add margin to your link loss calculation to adjust for any unforeseen losses. The amount may vary by designer or application but typically 2-3 dB will allow for sufficient headroom in you network link loss calculation.

Conclusion

The fiber optic link loss calculation and analysis are vital in cable plant. After the cable plant is installed, the calculated loss values are compared with the test results to ensure the link can operate properly. Besides, to reduce the link loss, high quality components are required. Quality is everything when gigabit and higher speeds are required. FS.COM provides high quality fiber optic connector, fiber optic cable and fiber optic transceiver at reasonable price. Also, they have test tools, such as light source and power meter.

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A Closer Look at HP ProCurve 2910al-24G Switch (J9145A)

Today, big data centers are upgraded from 10G to 40G or 100G, and some small homelabs migrate from 1G to 10G. For some small business data center, 24 port switch is enough. The switches produced by HP are popular with many data center designers for the high quality and low price. The HP ProCurve 2910al-24G Switch (J9145A) is highly recommended in many forums. This article will guide you to have a closer look at HP ProCurve 2910al-24G Switch (J9145A) switch.

Overview

The HP ProCurve 2910al-24G switch (J9145A) is a 24 port switch that can be used to build high-performance switched network. It offers low latency for high-speed networking. For port configuration, it has twenty 10/100/1000 ports, four dual-personality ports, one RJ45 serial console port and four 10G ports. The HP ProCurve 2910al-24G switch can provide the most flexible and easy-to-deploy uplinks in its class. It can be deployed at enterprise edge and remote branch offices, converged networks, and data center top of rack.

Applications of HP ProCurve 2910al-24G Switch

This part will give a detailed introduction to the network ports on HP ProCurve 2910al-24G switch and cabling solutions for the switch.

Ports on HP ProCurve 2910al-24G Switch

Twenty 10/100/1000 ports: All these ports have the “Auto MDIX” feature, which means you can use either straight-through or crossover twisted-pair cables to connect any network devices to the switch.

Four dual-personality ports: Each port can be used as either an RJ45 10/100/1000 port or as a mini-GBIC slot for use with mini-GBIC transceivers. By default, the RJ45 connectors are enabled. If a mini-GBIC is installed in a slot, it is enabled and the associated RJ45 connector is disabled and cannot be used. If the mini-GBIC is removed, the associated RJ45 port is automatically re-enabled.

Four 10G ports: These ports provide connectivity for 10G speed though either copper or fiber optic media.

Cabling Solution

Since HP ProCurve 2910al-24G switch has 10/100/1000 ports, it can be used for 1G to 1G connection. As shown in the following figure, two 1000BASE-SX SFP transceiver modules are respectively plugged into 1G ports on two HP ProCurve 2910al-24G switches. Then these two 1000BASE-SX SFP transceiver modules are connected via a LC multimode fiber optic cable.

Designed with 10G ports, HP ProCurve 2910al-24G switch can realize 10G to 10G connection just like the above 1G connection. Just replace the 1000BASE-SX SFP transceiver module with 10GBASE-SR SFP+ transceiver. Besides, you can also accomplish 10G to 10 connection by using a 10G SFP+ to SFP+ DAC twinax cable. The following figure shows the cabling solution for you.

Conclusion

The HP ProCurve 2910al-24G switch (J9145A) is a high-performance Gigabit Ethernet switch. It is a good selection for small business network deployment. If you need compatible fiber optic transceiver and fiber optic cable for HP ProCurve 2910al-24G switch, you can have a look at FS.COM. The following table shows some compatible optical components.

Originally published at: http://www.fiber-optical-networking.com/a-closer-look-at-hp-procurve-2910al-24g-switch-j9145a.html

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Set Up 10G Home Network

Nowadays, nobody would deny the importance of the network. It has become an inseparable part of our daily life. As it developed, people’s demand for bandwidth is increasing. And 10G network is widely applied in small and middle sized business. In addition, 10G home network can be also commonly found. This article will share some tips to set up 10G home network.

Consideration Before Setting Up 10G Home Network

Why do you need 10G network? It is not difficult to find that almost everything nowadays rely on a fast and reliable network, which leads to tremendous traffic and applications running on the network. It is necessary to upgrade your home network to support the growing of your business. Setting up 10G home network avoids network congestion at busy times while improves your productivity.

What do you want from 10G home network? Before you start to set up the network, better planning is needed. You should ask yourself a few questions, such as how many computers, printers and other peripherals will connect to your network? How much wireless coverage will you need at your location? What type of mobile devices will need access to your network?

Needs for 10G Home Network

10G Switch

To build a 10G home network, several components are required: 10G core switch, access switch with 10G uplink, and 10G network interface cards for servers and storage devices. The past few years had witness the price dropping of 10G network switch. For example, the cost of Ubiquiti Unifi and Edgeswitch switch are only $200. You can also find many 10G switch under $550, such as FS.COM 10G network switch S3800-48T4S only costs $480 by offering 48 100/1000Base-T and 4 10GE SFP+ ports.

10G Cabling

There are two cabling ways for 10G home network—10GBASE-T and 10G SFP+.

If you choose 10GBASE-T, then upgrading the existing 1G network to 10G can be simple. If 10G switch is designed with RJ45 ports, you can use the same RJ45 network cable to connect the 10G switch with your server, storage and some other switches. The only difference is to use Cat6a network cable instead of Cat5e and Cat6 cable, because Cat6a can support 10G data rate over 100 meters; or you can choose SFP+ 10GBASE-T module with 2.5W power consumption and a maximum distance of 30 meters.

For 10G network switch that supports 10G SFP+, you can use it with devices that come with 10G SFP+ ports, too. For server or storage devices with 10G SFP+ port, the most cost efficient way to connect them with 10G network switch is to use 10G DAC cable (direct attach cable). It is basically copper cable with SFP+ connector on both sides. But this cabling way is only suitable for short connectivity. For data link over 100 meters, a pair of SFP+ modules and the matching fiber optic cable are needed. Depending on the length required in home network, you can use 10G optics such as 10GBASE SR SFP module and multimode fiber to reach 300 meters.

Conclusion

For home network set up, 10G is a trend. But before you migrate your network to 10G, you still have to think about what you want or what you need. After that, the choice for components and cabling procedure can be easy.

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How Much Do You Know About PoE?

People’s increasing demand for more data traffic and higher data speed promotes the evolution of communication technology. The size of data center becomes larger and cabling system becomes more complicated. Recently, home network deployment springs up and a new network technology becomes a hot spot topic—PoE (Power over Ethernet). How much do you know about it? Do you use PoE devices? This article will focus on things related to PoE.

PoE

PoE technology allows network switches to transmit both power and data through an Ethernet cable at the same time. Take digital security camera for example. A digital security camera normally requires two connections to be made when it is installed: a network connection and a power connection. The former one makes the camera communicate with video recording and display equipment, while the latter one delivers the electrical power for the camera. However, if the camera is POE-enabled, only the network connection needs to be made, as it will receive its electrical power from this cable as well. Some equipment in home network usually use PoE, such as VoIP phone, IP camera and wireless access point.

PoE+

If you use PoE devices, you must have noticed that there are PoE+ devices on the market. What is the difference between them? PoE devices utilize the original PoE standard, IEEE 802.3af, which provides up to 15.4W of DC power to each device. While PoE+, also known as PoE class 4, is the latest standard, IEEE 802.3at, which provides up to 30W of power to each device. That’s to say PoE+ can provide almost twice as much power as PoE over a single Ethernet cable. High-powered IP devices such as PTZ cameras use PoE+. In addition, compatible NVRs use integrated PoE+ ports to provide power and PTZ commands to the camera, as well as video connection to the NVR.

PoE Switch

A PoE switch is a network switch that has Power over Ethernet injection built-in. It is straightforward to add PoE to your network. Simply connect other network devices to the PoE switch as normal, and the switch will detect whether they are POE-compatible and enable power automatically. PoE switches are available to suit all applications, from low-cost unmanaged edge switches with a few ports, up to complex multi-port rack-mounted units with sophisticated management.

Advantages of PoE

PoE technology brings several advantages to home network deployment:

Time and Cost Savings: A single Ethernet cable can support both data and power transmission. Besides, running Ethernet cable does not require a qualified electrician, it can be done by yourself.

Flexibility: Without being tethered to fixed power outlet, there are more placement options for devices such as IP cameras and wireless access points, and they can be repositioned easily if required.

Safety: PoE delivery is intelligent, and designed to protect network equipment from overload, underpowering, or incorrect installation.

Reliability: PoE power comes from a central and universally compatible source, rather than a collection of distributed wall adapters. It can be backed-up by an uninterruptible power supply, or controlled to easily disable or reset devices.

Scalability: Having power available on the network means that installation and distribution of network connections is simple and effective.

Conclusion

PoE technology realizes the power and data transmission over the same Ethernet cable at the same time, which makes home network deployment more convenient. FS.COM provides high quality PoE switches and all of them come with a one-year limited warranty, including any quality problems during the free maintenance.

Originally published at: http://www.fiberopticshare.com/how-much-do-you-know-about-poe.html