Månadsvis arkiv: maj 2018

Understanding Combo SFP Port on Ethernet Switch

For new comers who are not familiar with the structure and functionality of Ethernet switch, they are apt to get confused with different ports built in for different connection. Except for those common ports on SFP switch, such as SFP port , there is another port called “combo SFP port”. Do you know what is it and what is the difference between SFP port and combo SFP port? In this article we aim to give you comprehensive understanding of combo SFP port on Ethernet switch.

What Is Combo SFP Port on Ethernet Switch?

In a nutshell, a combo SFP port is regarded as a single interface with dual front ends, i.e. an RJ-45 connector and an SFP (Small Form Pluggable) module (also called Mini-GBIC) connector. In other words, this is a compound port which can share the same switch fabric, port number and allow the users to configure their SFP switch according to different applications. But the two different physical ports can not be used simultaneously. It means that you can either plug a cable into copper 10/100/1000 interface, or plug the cable into SFP slot.

A combo SFP port is a way to provide different types of connectivity and give users the power and flexibility to configure SFP switch for unique application requirements. Below is the demonstration of 4 combo SFP ports on FS SFP switch.

combo SFP port on a SFP switch

What Is the Difference Between SFP Port and Combo Port?

Combo interface, also known as optoelectronic multiplexing interface which is a switch device panel with two Ethernet ports: an optical port and an electrical port. Combo electrical port and its corresponding optical port are logically multiplexed, and the user can choose which one to use according to the actual network demand. But when one of the ports is activated, the other port is automatically blocked since they can not be used at the same time.

While SFP port (mini-GBIC port), a small form-factor hot pluggable interface, is designed for high speed and density SFP connection. SFP ports on SFP switch support both copper and optical links. When SFP ports on SFP switch are inserted into SFP modules with electrical ports, Ethernet copper cables are needed for data transmission. If SFP ports are plugged by SFP optical modules with optical ports, then fiber patch cables are required.

Introduction to FS.COM 24 Port Switch With 4 Combo SFP Ports

There are many SFP switches with combo SFP ports, but today we are going to take FS S3800-24F4S: 24 port switch with 4 combo SFP ports as an example to illustrate the usage of combo SFP ports on a SFP switch.

S3800-24F4S 24-port Gigabit switch comes with 20x 100/1000Base SFP, 4x 1GE combo and 4x 10GE SFP+ slots which offers up to 128Gbps switching capacity to synchronously process the traffic on all ports without any packet loss. The 4 combo SFP ports on switch facilitate the application of different connectivity, making it more flexible to configure the switch. In addition, this diversiform port combination form provides a high bandwidth aggregation connectivity for multiple switches to enhance network capacity. All in all, this 24-port Gigabit managed switch is fit for enterprise network operators who pursue high performance and low power processor to provide full speed forwarding and line-dormant capacity.


From the above introduction, we have known that combo SFP port on SFP switch is a port type to carry out different connection applications. For combo SFP ports on Ethernet switch, only one of the twisted pair port or SFP slot can be used. For SFP ports on SFP switch, it can be either plugged into Ethernet copper cable with RJ45 SFP module, or optical fiber cable with fiber SFP module to achieve short and long reach distance transmission. What is more, FS S3800-24F4S is a good example of combo SFP ports on switch. If you have any need, FS would be a choice.

Related Article: Understanding SFP Ports on SFP Switch

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How to Connect Ethernet Switch, Router and Modem

In the computer networking world, the three most ubiquitous pieces of equipment are Ethernet switch, router and modem. These are applied everywhere from data center to network connections in your own home. However, despite the importance of these three pieces of equipment, some people are oblivious or confused to their internal functions and connection mode. So in this article, we will attempt to explain the difference between each piece of equipment and introduce the common way to connect Ethernet switch, router and modem.

What Is the Difference Between Ethernet Switch, Router and Modem

From a physical perspective, a modem, router and Ethernet switch look very similar. Nevertheless, there are key differences between them internally and functionally with relevant purposes on a network.

  • Switch: Bridge Your Devices in a Network

An Ethernet switch is commonly referred to as a multi-port network bridge that processes and routes data on a data link layer (layer 2) and sometimes network layer (layer 3) of the OSI model. An Ethernet switch is an intelligent device which transmits data to specific MAC addresses within the LAN. It has the capability to learn and distinguish between specific addresses by accessing them from a CAM table.

Switch-Bridge Your Devices in a Network

  • Router: Connect You with the Internet

A router is the ”traffic director” of a network. It takes information provided by the modem or ONT and routes it to the various devices that are connected. Router uses protocols such as ICMP (Internet Control Message Protocol) to communicate with each other and configures the best route between any two hosts.

  • Modem: Connect Internet with ISP

A modem is the short way of saying “modulator, demodulator”, which is a hardware device that allows a computer to send and receive data over a telephone line or a cable or satellite connection. The main purpose of a modem when used in a home networking environment is to establish a connection between your home network and ISP.

Connection Between Ethernet Switch, Router and Modem

There are a handful of ways to set up a shareable home network connection, but the safest and most reliable way is to use a router and switch in combination. Once the switch is behind a router (which in most cases uses NAT), all devices connected to either the switch or the router can access the internet simultaneously. Placing the router between modem and Ethernet switch creates an extra layer of protection from threats on the Internet.

Here are the detailed steps for connection:

Step 1: Unplug the power supplies of cable modem, switch and wireless router. Unplug any Ethernet cables that are plugged into any of them.

Step2: Connect telephone wire with modem, and then connect an Ethernet cable to the Ethernet port on the back of the cable modem.

Step3: Plug the other end of Ethernet cable connected with modem into WAN port of router.

Step4: Connect another Ethernet cable to numbered Ethernet port on the switch and plug the other end into the LAN port on the wireless router.

Step5: Plug the power supplies of the modem, Ethernet switch and router in. After two minutes, the network and Internet connection is ready to go.

Connection Between Ethernet Switch, Router and Modem


As you read this, you may be clear about the knowledge of Ethernet switch, router and modem and the proper way to connect them in a network. For suitable Ethernet switch and gigabit switch of good quality, FS would be your great choice.

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PoE Switch for IP Cameras

With further enhancement of safety consciousness from general public, IP cameras are widely used in areas like schools, enterprises, public areas and even families. Using a PoE switch for IP security cameras to ensure the safety of people and business is a common and popular behavior nowadays. In this article we will intend to explore the advantages of using a PoE switch and help you choose a proper PoE switch for IP cameras as well.

PoE switch application

Figure1: PoE switch application

Benefits of PoE Switch for IP Cameras

When talking about PoE technology, some users may think that it is dispensable to buy a PoE switch with a relatively high price since a PoE injector can also achieve power supply and even space saving for IP cameras. But the reality is that if you have many PoE-enabled devices like 10 IP cameras, it is the optimal choice to use a PoE switch. In addition, it also provide the following benefits for IP cameras:

  • Easy Management and Low Cost

A PoE managed switch allows the power supply for each camera to be controlled remotely from any point in IP camera systems. It greatly benefits users to reboot those non-responding IP cameras without going to the camera’s location and therefore achieve cost and labor savings.

  • Long Runs

IP cameras can be installed anywhere no matter they are located in the far-field region or near-field region. The distance of running PoE IP camera can be up to 100m with a single Cat5e cable. Certainly, if longer runs are required, PoE repeaters may be needed.

  • Resilience to Power Failure

In general, all IP cameras are powered from one switch. So it can ensure continual surveillance in the case of a power cut if you attach a central UPS (Uninterruptable Power Supply) to the PoE switch.

Necessary Considerations When Choosing PoE Switch for IP Cameras

PoE switches come in different sizes, features and functions, so choosing a proper switch to match IP cameras sometimes constitutes a daunting task. Below we will introduce some essential considerations for your reference.

  • Port Count

According to the number of PoE-enabled devices, you need to decide how many ports of switch you need. This is a basic consideration when buying a PoE switch. To choose the switch that has larger PoE ports than your device number which is for your future-proofing upgrade. In a general way, 8 port PoE switch is suitable for small-sized families, while 48 port PoE switch can meet demands of larger businesses.

  • Unmanaged or Managed

For managed PoE switch, they enable network administrators to check the quality of the network copper cables linked to each switch port so as to help administrators to have a good command of the whole network.

  • IP Camera Power Consumption

Network designers need to know the power consumption for each switch port. It helps users to know how many IP cameras can be used. Since the power consumption of IP camera varies from type to type, it is important to know power budget of PoE managed switches so as to ensure the normal work of IP cameras.


PoE managed switch provides a simple and cost-effective wiring to power IP cameras. Choosing a suitable one is not a simple work, and this article explores several considerations when buying a PoE switch for IP cameras. For PoE managed switches with 8 port, 24 port and 48 port to apply to different IP camera security systems, FS is your good choice.

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24 Port Patch Panel to 24 Port Switch Wiring

Patch panel is intensively applied in the Ethernet cabling installation and regarded as a critical component in the entire cabling systems. Typically, patch panels are available in various port densities from 12 port to 48 port. Among those different ports, the 24 port patch panel is the most fashionable choice to connect gigabit switch for small LAN cable management. This article will focus on the advantages and wiring for using a 24 port patch panel to a 24 port switch.

Why We Need a 24 Port Patch Panel for a 24 Port Switch

Some people may ask that, is it necessary to use a patch panel or is it possible to replace the 24 port patch panel by a 24 port switch? Actually, it is better to use a 24 port patch panel to a 24 port switch. The reasons include below aspects:

  • Identification

As the network grows, more ports are becoming a trend to accommodate ever-expanding demand. Therefore, cable management has become a necessity. When there is a need for testing or disconnecting a special cable, you could easily locate them on the 24 port patch panel by labeling for each port to identify the target. What is more, the labels help to achieve a neat and organized way for cable management, especially for cable ties and mounting components.

  • Troubleshooting

Patch panel makes the process easier to troubleshoot problems since it groups all of the input jacks into one side and the output jacks into the other side. When it comes to a connection fault with a 24 port switch, patch panel helps identify whether the fault is on the switch side or the cable side.

To sum up, a 24 port patch panel benefits network engineers a lot by offering convenient and flexible routing options. Because a 24 port patch panel has enough ports in close proximity so that cables can be routed, labeled and monitored easily and efficiently.

How to Connect a 24 Port Patch Panel to a 24 Port Switch

How can I connect my 24 port switch to a 24 port patch panel? Below is a step-by-step guide to wiring process.

Step 1: Attach the 24 port patch panel and 24 port switch to a rack-mounted floor stand in the wiring closet.

Step 2: Run the Ethernet cables from their jack locations out in the computer room. Each cable will come from a wall mounted jack that the installer has placed in the wall. They will all return to the wiring closet through a small hole to accommodate the wires.

Step 3: Connect the wires into the 24 port patch panel and use a punch-down tool to connect the wires to the appropriate slots on the patch panel. Once the wires are all attached, it is better to secure the wires in a bundle by using plastic zip ties.

Step 4: Label each jack location on the 24 port patch panel to designate which room is connected to that jack.

Step 5: Plug a patch cable into each port on the 24 port patch panel and plug the other end into the 24 port switch. These wires can be moved from port to port if needed to promote location changes to the network.


The 24 port patch panel helps to make cable management and troubleshooting works easier when connecting to the 24 port network switch. The wiring process is also essential for a reflectively large network. If you have any need for 24 port patch panels and 24 port switches, FS is a good choice.

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Recommendations for 48 Port Switches

In order to satisfy the growing demand of an improved enterprise network management, a significant change in the market was the appearance of 48 port switch. The 48 port gibabit switch is considered as a first-rank solution that offers proper port density and great scalability potential for a relatively larger network. In this article we will recommend 4 different kinds of 48 port gigabit switches to you on the basis of managed or unmanaged and PoE or non-PoE.

Managed 48 Port Switch Recommendation

  • Non-PoE: FS S3800-48T4S

As a member of S3800 series family, S3800-48T4S is a 48 100/1000Base-T ports Gigabit managed switch with 4 10G SFP+ uplinks that is designed for medium or larger network environment. With rich enterprise-class and managed features, this 48 port switch can be easily configured and monitored through a web-based graphical user interface. It has two separate supplies: single power and dual power versions which can be used as alternatives and selected in accordance with different requirements. In general, the S3800-48T4S 48 port switch is the ideal L2+ access switch solution with 10GbE uplink for converged data, video and voice networking.

  • PoE: FS S1600-48T4S

As a managed PoE switch, FS S1600-48T4S comes with 48 10/100/1000Base-T RJ45 Ethernet ports, 1 console port and 4 10G SFP+ slots, which transmits both power and data through a single Ethernet cable at the same time. It dramatically simplifies the process of installing APs, IP cameras, VoIP phones and other PoE-enabled devices. This 48 port PoE swith allows users to connect to a high-performance storage server directly or deploy a long-distance uplink to another switch.

Unmanaged 48 Port Switch Recommendation

  • Non-PoE: TP-LINK TL-SG1048

The TL-SG1048 unmanaged Gigabit switch with 48 10/100/1000Mbps RJ45 ports provides you with a high-performance, easy-to-use and standard upgrade to boost your old network to 1000Mbps. It supports IEEE 802.3x flow control for full duplex mode and backpressure for half duplex mode. Its plug and play design also optimizes the installation process. TL-SG1048 48 port switch is designed to meet the needs of the demanding workgroup and departmental connectivity requirements.

  • PoE: Cisco SF200-48P

The Cisco SF200-48P unmanaged switch includes 48 10/100Base-TX fast Ethernet ports, 24 of which support Power over Ethernet to PoE-enabled IP devices like VoIP phones that allows you achieve business-class network security and performance. This 48 port PoE switch includes QoS features to enable you to prioritize delay-sensitive traffic in network and let you converge all of your communications solutions such as IP telephony and video surveillance over a single Ethernet network.


Nowadays, high density port switch is popular with small and middle-sized business data center. What is more, 48 port switch is becoming a hot topic. This article focuses on the recommendation of 4 types of 48 port switch for different requirements: managed non-PoE switch, managed PoE switch, unmanaged non-PoE switch and unmanaged PoE switch. Each kind of 48 port switch has its own characteristics and functions when applied to different situations and demands. For 48 port gigabit switch or 48 port PoE switch, FS.COM could always be a good choice.

Related Article: 24 Port Switch Recommendation

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48 Port PoE Switch: Managed vs Unmanaged?

It is generally known that Power over Ethernet (PoE) technology is developed to satisfy the needs of connectivity to network devices like IP cameras, VoIP phones and Wireless Access Points (WAP). As a consequence, PoE switch is required to be capable of supporting PoE devices. There are 8 port, 24 port and 48 port PoE switches in the market. And for each type, managed PoE switch and unmanaged PoE switch are available. 8 port and 24 port PoE switches have been explained in previous posts. So today’s topic is about 48 port PoE switch managed vs unmanaged.

48 Port PoE Switch: Why Choosing Managed Over Unmanaged?

48 port managed PoE switch can expand the long-range flexibility of your network and adapt to changing environments. With organization grows, your business needs will continue to increase. So it is wise to deploy 48 port PoE switch which can respond to your dynamic business demands.
  • 48 port PoE switch managed can be configured and it can prioritize LAN traffic to make the most important data get through. While 48 port PoE switch unmanaged is a plug and play device which can not be configured or analyze the data traffic.
  • If there is an unused port on 48 port PoE managed switch, you can disable that port or even employ MAC address filtering so as not to allow unauthorised users or devices to access the network by plugging in. This can ensure safe network connections.
  • The major advantage of 48 port PoE managed switch is the failover redundancy which helps to achieve less network downtime.

Applications of 48 Port PoE Managed Switch

48 port PoE managed switch can be used in different networks as an access layer switch or a core switch.
  • Deploying the 48 Port PoE Managed Switch in Access Layer
When used in access layer, the 48 port PoE switch can support multiple PoE network devices. Suppose that SMB has two office buildings located 100 meters from each other, and each building has a server rack. The first office has 20 VoIP phones, 10 IP cameras, 10 IP access points and 40 computers, while the another building has double the number of devices. Now we will need not only 48 port PoE switch but also 48 port Ethernet switch in the access layer.
Deploying the 48 port PoE managed switch FS S1600-48T4S in access layer
Figure1: Deploying the 48 port PoE managed switch FS S1600-48T4S in access layer
  • Deploying the 48 Port PoE Switch as a Core Switch
For small and midsize networks, the 48 port PoE switch can also be used in the core area. It is workable to establish an aggregated high bandwidth link between core switch and access switch by implementing link aggregation. For a 48 port PoE switch with 10G fiber ports, it can not only realize 4x10G aggregation between core switch and access switch with 10G fiber uplink ports, but also achieve 4x1000Mbps aggregation between core switch and Gigabit access switch.
Deploying the 48 port PoE switch FS S1600-48T4S as a core switch
Figure2: Deploying the 48 port PoE switch FS S1600-48T4S as a core switch


As previously mentioned, we have discussed the reasons why choosing managed over unmanaged for 48 port PoE switch. Since a managed switch has more advantages than an unmanaged switch, it is better for you to have a managed switch in your network. 48 port managed PoE switch is preferred in LAN applications for both access layer and core layer because of its high functionality and simplified management features. If you have any demand, Fiberstore could meet your expectations.
Related Article: FS 24 Port PoE Switch Introduction
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GBIC vs Media Converter Comparison and Application

In the field of optical communications, many devices have similar functions, such as GBIC vs media converter. They can be considered as the equipment for photoelectric conversion. But do you know their corresponding operating principles? How can the optical transceiver be used in conjunction with the media converter? In this article we are going to talk about their working ways and applications.

GBIC vs Media Converter: How Does Optical Transceiver Work

As a kind of optical transceiver, GBIC, also known as gigabit interface converter, is commonly used in GbE and Fibre Channel environments. The optical module is made up of optoelectronic devices with transmitter and receiver, functional circuits and optical interfaces. To put it simply, the function of an optical transceiver is photovoltaic conversion. The transmitter converts an electrical signal into an optical signal and the receiving end transforms the optical signal into an electrical signal so that the information could transmit in the optical fiber. The principle of optical transceiver is the same as media converter, but it is safer and more efficient than media converter.

GBIC vs Media Converter: How Does Media Converter Work

Media converter is made up for the traditional Ethernet short transmission distance to realize long distance transmission of the signal. For GBIC vs media converter, the latter is a simple networking device that makes it possible to connect two different media types, such as twisted pair copper with fiber optic cable. Currently, there are commonly two types of media converters: copper to fiber media converter and fiber to fiber media converter.

GBIC vs Media Converter: Coordination Between Optical Transceiver and Media Converter

A fiber media converter is used to extend copper UTP Ethernet cabling to distances beyond 100 m by converting the signals to fiber optic cabling. Media converters have two types of ports. One is for copper and the other is for fiber. In terms of fiber ports, there are also two kinds. One is designed for fiber optic transceivers (SFP, XFP and etc), and the other for fiber optic patch cables (SC, LC and etc). The copper ports are designed for RJ45 copper cables. SFP module is for LC while GBIC is for SC.

Fiber Media Converter

If you want to use an application that uses fiber media converters, the copper and fiber industry standards must match. Below shows the coordination between SFP vs media converter.

1. Connect the copper port of Cisco switch with RJ45 port of fiber media converter by using an UTP cable.

2. Insert an SFP module into SFP port of fiber media converter.

3. Insert an SFP module into SFP port of Brocade switch.

4. Use fiber optic patch cable to connect the fiber media converter with Brocade switch.

Coordination Between GBIC vs Media Converter


To sum up, media converter is a device that converts electrical signal used in copper unshielded twisted paired (UTP) network cabling into light waves used in fiber optic cabling, and vice versa. Media converter is usually used with the optical fiber patch cords to extend the transmission distance. What should you notice is that different optical transceiver, like SFP and GBIC, should be connected with relevant ports, such as LC, SC and etc. GBIC vs media converter is not the only way to achieve photovoltaic conversion. If you are looking for a media converter, Fiberstore would be a good choice.

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