Transceiver Module Temperature: How Much Do You Know?

Transceiver module temperature has an important effect on the function of communication system. If the temperature of transceiver module is over its given range, it will cause transmission delays, drastically reduced output and network partitions. This article will give a clear explanation for the transceiver module temperature.

Transceiver module

Figure 1: Transceiver modules

What Is Transceiver Module Temperature?

The transceiver module temperature determines the available temperature of transceiver modules. According to different types and brands, transceiver modules may have different temperature ranges. For example, the temperature range of optical transceiver is larger than copper module, and the temperature range of SFP module is smaller than SFP+ module such as 1000BASE-SX SFP is from 0 to 70°C while 10Gbase-SR is from -40°C to 85°C. Conventionally, the transceiver module temperature mainly includes three levels: commercial temperature range (COM: 0~70°C), extended temperature range (EXT: -20°C~85°C), and industrial temperature range (IND: -40°C~85°C).

Transceiver module temperature

Figure 2:Transceiver module temperature

Why Suitable Temperature Is Needed on Transceiver Module?

Each transceiver module has its operating temperature range. If the temperature is too high or too low, the transceiver module will not work normally.

If the operating temperature is too high, its optical power will become larger and the receiving signal will be incorrect, which leads to the disordered operation of the transceiver module. Or even worse, the transceiver module would be burned. Facing this problem, you can add a temperature control system for real-time monitoring and compensation. It can ensure the transceiver module extinction ratio and stable luminous power, which helps the optical system work normally.

If the operating temperature is too low, the function of the transceiver module also will be unstable. Usually, the temperature of the transceiver module will not be too low as long as the transceiver is not put in the environment with a temperature below 0°C.

What Can Affect the Transceiver Module Temperature?

When a transceiver module is being used, the power consumption and case surface will affect its temperature. Except these, there are mainly three aspects that affect the transceiver module temperature.

  • Poor quality – The transceiver module with poor quality has unstable function and poor heat dissipation. As a result, the abnormal temperature of the transceiver module will happen very frequently. While, if you use the transceiver module with better quality and workmanship, the temperature anomaly and unnecessary discard will be reduced.
  • Harsh application environment – Transceiver modules are commonly used in the computer room, home networks, and data center. If they are applied in other harsh environments such as oil, deserts, mountains and so on, the temperature of these transceiver modules will be changed by the ambient environment. Then their optical power and optical sensitivity will be damaged.
  • Using second-hand transceiver modules – As mentioned above, the temperature of a new transceiver module is at 0-70°C. While the temperature range of the second-hand transceiver module is smaller than the new one. Because some functions of the second-hand one have degenerated.


Transceiver module temperature stability is an important factor to ensure module work normally. FS.COM provides comprehensive transceiver modules which have a wide temperature range with a very high tolerance level, such as the compatible GLC-LH-SMD module covering commercial temperature from 0 to 70°C. All modules from FS are 100% tested and have a reliable quality. If you have any needs, welcome to visit FS.COM.

Related Article: SFP Module: What’s It and How to Choose It?

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Ethernet Switch vs Hub vs Splitter: What’s the Difference?

Ethernet switch, hub and splitter all are networking devices that are designed to connect computers, other network devices, or even other networks. However, each of them has its special merits and drawbacks. Then, what on earth are they and what’s the difference between them? In this article, we will explore Ethernet switch vs hub vs splitter.

Ethernet switch vs hub vs splitter

Figure 1: Ethernet switch vs hub vs splitter

Ethernet Switch vs Hub vs Splitter: What Are They?

Ethernet Switch

Usually, an Ethernet switch works at the data link layer (layer 2) or the network layer (layer 3) of the OSI (Open Systems Interconnection) model. Therefore, it can support multiple packet protocols. As a multi-port network bridge, the Ethernet switch provides various ports for subnets to connect computers, cameras, printers, etc. Through these ports, the data packets can be sent and received within a LAN.


A hub commonly operates at the physical layer or layer 1 of the OSI model. It consists of different ports used to connect segments of a LAN. When a data packet arrives at one port, it is copied to other ports that all packets can be seen by all segments of the LAN.


The splitter is an integrated optical power distribution device. It is one of the commonly used passive optical devices. And it is used to split a light beam into two or more light beams and couple them to the branch distribution without external power.

Ethernet Switch vs Hub vs Splitter Comparison

There is a saying, hubs are yesterday news and splitters are basically unnecessary. An Ethernet switch is probably what you want. Is that true? Here we will make a comparison between them.

Ethernet Switch vs Hub

Ethernet switch and hub have similar roles in the network. To understand the difference between Ethernet switch and hub, we’d better get to know frames first. The frames act as a central connection that carries data. And these frames can be received, amplified and then transmitted on to the destination port. The main difference between Ethernet switch and hub is the way that frames are being sent.

Ethernet Switch vs Hub

Figure 2: Ethernet switch vs hub

The hub can not examine the data it receives or sends. Therefore, just as mentioned above, when a frame arrives at one port, other ports will copy the data to ensure the data can be delivered to its destination. With this feature, a hub can create more connection points, which extends the network. However, this may cause a lot of traffic. What’s more, the bandwidth of the hub needs to be shared with its ports, which slows down the network. So the hub is usually used for the small-sized home network.

Ethernet switch can keep the record of the MAC (Media Access Control) addresses of all the devices connected to it. Therefore, when a frame is received, a switch knows which port it will be sent to. Moreover, unlike the hub, the switch allocates the same and full bandwidth to each of its ports.

All in all, the Ethernet switch is regarded as a better choice than the hub. Instead of using the hub, you can use 8 port switch for small-sized family. And you also can use 1GB switch or other Ethernet switches with larger capacity for busy networks.

Ethernet Switch vs Splitter

As mentioned above, splitter plays an important role in the passive optical network. It means that the splitter doesn’t need power input to split a single Ethernet connection into two connections. However, it needs to be used in pairs. What’s more, the splitter is based on 100BASE-T standard, which deals with network traffic at the rate of 100Mbps. So is it not suitable for long transmission or large data center.

In terms of Ethernet switch, it usually needs a power input. So it can divide an Ethernet signal into multiple signals and these signals can operate simultaneously to achieve a fairly long distance. Besides, Ethernet switch is a high speed networking device with multiple ports. You can use one port to connect the switch to the router and the rest to connect other devices. As a result, different devices such as computers, video game consoles, and printers can be connected by the switch and still work fast in a system.

Ethernet Switch vs Splitter

Figure 3: Ethernet Switch vs Splitter

If you want to connect additional computers or a switch in the same room or nearby rooms, you can choose the splitter. While the Ethernet switch is more widely used in building, campus and so on.


As for Ethernet switch vs hub vs splitter, we know they are used for different purposes. The best Ethernet device is the one that suits your needs most. So you can choose to buy switch, hub or splitter according to your demands. If you want to know more information such as network solution, 8 port switch price or 24 port switch price, welcome to visit FS.COM.

Related Article: What Is a Fiber Optic Splitter?

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FS 4U Rack Mount FHD Fiber Optic Enclosures Comparison

With the increasing demand for better network, the data center devices need to be kept upgrading. To meet the requirement for easy-to-manage fiber cabling environments, FS has upgraded 4U FHD rack mount fiber optic enclosures. Well, what’s the difference between the upgraded 4U FHD fiber enclosure and the old one? This article will give a clear explanation for it.

What Is Fiber Optic Enclosure?

To understand the difference between the upgraded 4U FHD fiber enclosure and the old one, we’d better get to know fiber optic enclosure first. Fiber optic enclosure, also called fiber spice box, refers to an empty box or a unit. It is a high-density equipment which is designed to house, organize, manage and protect fiber optic cables. It usually comes in rack units of 1U, 2U, 4U, or more rack units (U is short for rack unit and 1U equals 1.75 inches). So fiber enclosures with different rack units have different fiber capacities. For instance, 1U fiber enclosure can support 96 fiber cables, while 2U fiber enclosure can support up to 192 fiber cables. Moreover, fiber optic enclosures come with different configurations for different deployment scenarios, including rack mount, wall mount enclosure, and indoor or outdoor enclosure.

fiber optic enclosures

Figure 1: Fiber optic enclosure

4U Rack Mount Fiber Optic Enclosures

As mentioned above, 4U rack mount fiber optic enclosure is one type of high-density fiber optic enclosures for 19 inch rack mount. 4U rack mount fiber optic enclosure allows for 12 x fiber adapter panels or 12 x MPO/MTP cassettes, holding up to 288 fibers. Usually, 4U rack mount enclosures have traditional cover removable type and slide-out type. Compared to cover removable type, the slide-out type is more costly, but it is easier for pull-out sliding trays. Thus, by using slide-out type, there is no need for users to remove the whole fiber enclosure from the rack to get internal access. In fact, the new generation of rack enclosure is mostly the slide-out type. What’s more, this high density enclosure can provide a flexible system for managing a variety of fiber terminating, splicing and patching applications to minimizing floor space and maximizing rack space utilization.

FS 4U rack mount FHD fiber enclosure

Figure 2: FS 4U rack mount FHD fiber enclosure

FS 4U Rack Mount FHD Fiber Optic Enclosures Comparison

FS recently develops a new type of 4U rack mount fiber optic enclosure. The upgraded 4U rack mount FHD fiber optic enclosure and the old one share most functions. For instance, they provide a modular system for managing fiber connections and support up 288 fibers capacity for LC interface. They can also house MTP modular cassettes or fiber adapter panels. Besides, both of them are made of SPCC (Black Coating). Then what’s their difference?

  • Upgraded the slide rail – The upgraded 4U rack mount FHD fiber enclosure has new-design parallel slide-out drawer, which can be pushed or pulled more stably as well as faster.
  • Upgraded the door latch – With new type symmetrical door latch, this new 4U rack enclosure can divide force evenly when open the door.
  • Adjusted the distance – The distance from the ear of this enclosure to its door has been reduced from 139mm to 108mm, which is easier and more convenient for operation.
  • Price – Usually, the more functions of the equipment, the higher cost of the product. Therefore, the upgraded 4U rack enclosure is $30 higher than the old one.


Rack mount fiber optic enclosures, as the important cable management element, are widely used in data centers. FS upgraded 4U rack mount FHD fiber optic enclosures offer the improved performance and are more convenient for network cable management. And each enclosure will be shipped with an accessory pack, including mounting screws, spools, bend radius bracket for proper installation and cable ties for cable management. Moreover, FS also provides reliable fiber cassette and fiber optic patch panel for your network. If you have any needs, please feel free to visit FS.COM.

Related Article: Which Type of Rack Mount Fiber Enclosures Should You Choose?

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10GBASE-CX4 vs DAC Cable vs 10GBASE-SR: Which Is the Best Option for 10G Network in Short Reach?

10 Gigabit Ethernet, defined by the IEEE 802.3ae, was first ratified in 2002. With the increasing demand for faster data transmission and greater capacity over the network, 10GbE has been widely deployed. Nowadays, for short range, data center administrators have some 10GbE solutions to choose from, including 10GBASE-CX4, DAC cable, and 10GBASE-SR modules. Well, which is the best option for 10G network in short reach? In this article, we will discuss 10GBASE-CX4 vs DAC cable vs 10GBASE-SR.

10GBASE-CX4, DAC Cable and 10GBASE-SR Basics

To understand the difference among 10GBASE-CX4, DAC cable, and 10GBASE-SR, we’d better get to know some basic information about them first.


10GBASE-CX4 is the first favorite for 10GbE deployment. It uses the XAUI-lane PCS (Clause 48) and copper cabling. This cable is rigid, bulky and has a large diameter that brings difficulties to cable management. And the size of the CX4 connector is too large to allow the large-scale deployment in the high-density switch. However, 10GBASE-CX4 cable offers low power and low latency.

DAC Cable

DAC cable (direct attach copper cable) is a kind of fixed high speed copper cable assembly for short-range. It consists of shielded twinax cable with pluggable connectors on either end with varying gauges from 24 to 30AWG: The longer the distance, the higher the AWG rating should be. With these features, DAC cable can greatly reduce the latency, power consumption and installation time. In addition, DAC cables are commonly available in two types: passive DAC cable and active DAC cable.

DAC cable

Figure 1: DAC cable


As an SFP 10G module, it adopts 850nm lasers and has a data transmission rate of up to 10.3125 Gbps. The letters “SR” refer to short reach, thus this standard is designed to be used in short distance. But the exact transmission distance depends on fiber cables. For example, it can reach link length up to 33 m over OM1 and up to 300 m when connected with OM3. What’s more, 10GBASE-SR should be operated within the specified temperature and voltage limits, and the LC duplex connector is the best fit for it.

10gbase-cx4 vs DAC cable vs 10gbase-sr

Figure 2: 10GBASE-SR transceiver

10GBASE-CX4 vs DAC Cable vs 10GBASE-SR Comparison

10GBASE-CX4, DAC cable and 10GBASE-SR bear some similarities. For instance, they can be used for 10G network connectivity. However, they also have some differences.

10GBASE-CX4 vs DAC Cable vs 10GBASE-SR: Transmission Distance

10GBASE-CX4, DAC cable, and 10GBASE-SR are all suitable for the short distance. But the exact transmission distance is different. 10GBASE-CX4 is designed to work at the transmission distance up to 15 m. The liking distance of passive DAC cable is limited to 7 m and the active DAC cable reaches from 7 m to 15 m. And 10GBASE-SR can reach the max. link length up to 400 m over OM4 fiber.

10GBASE-CX4 vs DAC Cable vs 10GBASE-SR: Cost

DAC cable is cost-effective as it does not need patch panels or additional cables for cable management. Compared to DAC cable, 10GBASE-CX4 is more expensive. 10GBASE-SR is even more costly for SFP+ fiber electronics are expensive. What’s more, 10GBASE-SR needs more devices including fiber patch cables, patch panels, fiber optic cassettes, etc. in application. Besides, the maintenance of 10GBASE-SR still costs much when its reach is over 100 m.

10GBASE-CX4 vs DAC Cable vs 10GBASE-SR: Application

Conventionally, 10GBASE-CX4 is suitable for the deployment of switch to switch and switch to server in a rack or same room. DAC cable is commonly employed in intra-rack and inter-rack connections, including interconnection of top-of-rack switches with servers and storage devices in ToR or adjacent racks. Due to the longer transmission distance, 10GBASE-SR can be used in large buildings, enterprise wiring closet, and service provider transport applications.

10GBASE-CX4 vs DAC Cable vs 10GBASE-SR: Which Is the Best Option for 10G Network in Short Reach?

10GBASE-CX4 is an early favorite for 10G network, but it is now outdated due to its relatively large connector and high price. DAC cable costs less and consumes less power than 10GBASE-SR, but it reaches only up to 15 m. You can choose the DAC cable if your switch in the same rack. 10GBASE-SR has the longest transmission distance (up to 400 m) among them and it can provide a smaller cable profile and flexibility in the placement of servers. As mentioned above, 10GBASE-SR is the most expensive solution. Fortunately, the booming of the third party reduces the price of it. All in all, since the demand for bandwidth and link length is not gonna slack, 10GBASE-SR may be the best option for short connections.


10GBASE-CX4 vs DAC cable vs 10GBASE-SR: which is the best option for 10G network in short reach? You might already get the answer. When you choosing 10 GbE transceivers for short reach in the market, you can refer to the comparison in this article. And FS provides various cables and transceivers with high quality. If you have any needs, welcome to visit

Related Articles:
10 Gigabit Ethernet Overview
What’s DAC Cable And Why Choose It Over Fiber Transceiver?

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How to Choose Managed Switch for Home?

As a kind of Ethernet network switch, the managed switch is now widely used for home network. Therefore, choosing a well-performing managed switch for home is a significant task. Well, how do you choose a managed switch for home? Here will have a thorough introduction to the managed Gigabit switch, its benefits and how to choose it.

Managed switch for home

Figure 1: Managed switch

What Is Managed Switch?

The managed switch is a device that can be configured. It is designed with diverse advanced features such as VLAN, SNMP, CLI, IP routing, QoS, etc. Therefore, this manageable switch is usually used in the core layer of a network to offer the most comprehensive functions. What’s more, managed gigabit switches are available in two types: fully managed switches and smart switches. The former offers all capabilities of the managed switch while the latter does not contain so many features. As shown in the figure below, FS S3900-24T4S fanless stackable switch has an advanced feature set that brings robust multicast control, high availability, security and simple management.

FS fanless 24-port managed switch

Figure 2: FS fanless 24-port managed switch

Why Choose the Managed Switch for Home?

There are three main advantages of choosing the managed switch for home network.

Security and resilience – Managed switches deliver the most precise control of data, bandwidth and traffic control. And additional firewall rules can be set up into it directly. Therefore, the managed switch can provide good protection of the data plane, control plane, and management plane.

Redundancy – Redundancy means a back up data path to network traffic to safeguard the network when a connection or cable fails. The managed switch can incorporate Spanning Tree Protocol (STP) to provide path redundancy in the Ethernet network. And this also prevents loops which are created by multiple active paths between switches.

Prioritize bandwidth for data subsets – The managed switch can prioritize one type of traffic over another. This enables more bandwidth to be contributed through the network. Therefore, this function brings higher network performance and better transmission of delay-sensitive data.

How to Choose Managed Switch for Home?

When choosing a managed switch for home in the market, you’ll find there are many options. Here is a guide for you.

Features and performance – As mentioned above, the managed switch has many features. There is no need for you to select a managed switch with all features for home. Except for the basic features such as advanced QoS, VLAN, security, etc, you’d better take switching capacity, max power consumption, continuous availability into consideration. Beside, fanless and stack designs are important factors as well. Fanless design help reduce the power consumption and stack design can save the place makes.

Switch ports – The managed switch often comes with copper or optical ports, PoE or PoE+ ports, and a console port. Usually, there are three types of ports on a managed switch. The copper port can connect with Cat5e or Cat6. Compared with the copper port switch, the switch with optical port connects with fiber transceivers and optic cables to uplink to the backbone switch for longer transmission. PoE or PoE+ ports are designed for home IP camera systems, or for situations where there is no power source for PoE enabled devices. The count of the main ports often come with 8, 24 or 48. Besides, the 8-port and 24-port managed switches are commonly used for home. You can choose a suitable one based on your need.

Costs – The cost of copper port switch is lower than that of the optical port switch. What’s more, devices connected with copper port like Cat5e or Cat6 are cheaper than the device needed by the optical port including transceiver and fiber patch cable. When you already have determined the type of managed switch you want, you can compare the price from different companies. Usually, managed switches from famous brands are expensive. If you have limited costs, you can choose managed switches from other reliable firms. All in all, cost-effective product is a better choice.


The best network switch is the one that suits your network most. When you buying a managed switch for home, remember to consider the factors mentioned above. FS provides various managed switches with high-quality and high performance. If you have any needs, welcome to visit FS.COM.

Related Article: Managed vs Unmanaged Switch: Which One Can Satisfy Your Real Need?

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