Månadsvis arkiv: maj 2018
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.
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
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.
- 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.
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.
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.
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.
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
Since a switch performs the same job as a hub that they are both able to transmit data from one computer to another, an Ethernet switch is sometimes called a hub. Furthermore, some people even use these two terms interchangeably to refer to one box because of their similarity in appearance. However, there is a great difference between a true hub and a network switch. In order to help you differentiate them and buy what you really need, we will introduce the respective basics and applications of Ethernet switch and hub.
The Basics of an Ethernet Switch
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. And it can do everything a hub does with higher efficiency and recognize the intended destination of the information that they receive.
The Basics of a Hub
A hub works on the physical layer or layer 1 of the Open Systems Interconnection (OSI) model. It is a device that connects multiple Ethernet devices on one network and makes them work together as a single network. A hub does not examine the data it receives or sends, so when a packet arrives at one port, it is just copied to the other ports so that all segments of the LAN can see all packets.
Ethernet Switch vs Hub: Which One Should I Buy
Hub was initially popular due to the high price of Ethernet switch, while switch is not so expensive these days. Hubs are gradually becoming obsolete in some occasions. But they are still useful in special circumstances. Below are the application comparisons between Ethernet switch vs hub.
- For small-sized families, a hub is the easiest and least expensive way to construct a network of personal computers together; when it refers to Gigabit switch, an 8 port Gigabit switch is a structured wiring solution designed to satisfy this need.
- People tend to benefit a lot from an Ethernet switch over a hub if their home network has four or more computers, or if they want to use their home network for applications that can generate significant amounts of network traffic, such as multiplayer games or heavy music file sharing. By generating less network traffic in delivering messages, an Ethernet switch performs better than a hub on busy networks.
- In a small network where there are lesser users or devices, a hub can easily deal with the network traffic and is also a cheaper option for connecting devices to a network. While when the network becomes larger with about 50 users, it is better to use Ethernet switch to cut down those unnecessary traffic.
- If the performance-monitoring tool shows the situations of network bottleneck or congested network, the hub may need to be replaced with Ethernet switch for increased performance. This is vitally important when working with both hubs and switches in a production environment.
Ethernet switch and hub are frequently used in the same network. A hub extends the network by providing more ports and an Ethernet switch divides the network into smaller, less congested divisions. You can choose to buy Ethernet switch or hub according to your different demands.
Sometimes it is hard to distinguish network cabinet from server rack cabinet when you want to install a new server or networking equipment in office and decide what kind of equipment is suitable for you. From the appearance point of view, they are almost the same since both network cabinet and server rack cabinet come in the uniform sizes, such as 42U. Actually, they still have some specific differences. In this article we will reveal these distinctions of network cabinet vs server rack cabinet so as to help you choose a proper cable management expert.
What Is Network Cabinet
Network cabinet is normally used for the storage of router, patch panel, switch and a wide variety of networking equipment as well as networking accessories. In most cases a network cabinet will be shallower than a server rack cabinet. They are usually less than 31 inches in depth. Because thermal requirement is not typically an issue with the equipment stored in the network cabinet, they are more likely to have a glass or a strong plastic front door instead of a perforated one.
What Is Server Rack Cabinet
Server rack cabinet is mostly applied to install servers, UPS ES, monitors or similar equipment. It is available in a wide array of heights, widths and depths for rackmount compatibility in standard IT equipment. Take 42U server rack as an example, it is generally 24 inches wide and 36 inches deep by industry standards. Some companies can also offer other measurement options to meet various demands. This kind of cabinet usually has a perforated front and rear door for ventilation to maintain a suitable environment for the heat-generating equipment inside.
Network Cabinet vs Server Rack Cabinet Differences
For the differences between network cabinet and server rack cabinet, you may get a basic impression and draw inspiration from what we have discussed above. Now let us make a summary about their major distinctions.
Due to server rack cabinet is going to house network equipment that is longer, it must be deeper than network cabinet in depth. In a similar way, network cabinet is used to house routers, patch panels and other networking equipment, such as fiber optic cable, which requires significantly shorter in depth. There is often a difference of 800 mm to 1200 mm in terms of the depth.
Most servers will produce a considerable amount of heat. The type of equipment generally housed in network cabinet does not generate the same amount of heat as that housed inside a server rack. In order to help facilitate airflow over the hotter servers, a server rack cabinet is going to be designed out of a perforated material with vented fronts and backs. With regard to a network cabinet, the equipment housed inside does not generate much heat in comparison, so they are designed out of a solid tempered glass or Plexiglas for the front door and a solid material for the rear panel.
It is vital to look into the overall dimensions of the equipment that you use before you decide upon which is going to be the right choice. It is also important to notice that improperly housing heat generating equipment is dangerous, which could cause damage to your equipment. The most appropriate is the best. If you have any demand for network cabinet or server rack cabinet, Fiberstore would you a good choice.
With the swift development of science and technology, the majority of people have access to the Internet. Our home and enterprise networks rely on either wired technology or wireless technology. Wireless communication technology is also regarded as a modern alternative to traditional wired networking. When both sides: fiber optic cable vs wireless are the opposites in a competition, which one will win the favor?
Fiber Optic Cable vs Wireless: What Is Fiber?
It is a method of transmitting information from one place to another by sending pulses of light through an optical fiber. It is delivered through thin glass pipes known as fiber optic cable with the usage of light waves. This technology is generally considered as the successor to DSL broadband which is delivered over copper telephone network.
Fiber Optic Cable vs Wireless: What Is Wireless?
Wireless network is a network set up by using radio signal frequency to communicate among computers and other network devices. Sometimes it is also referred to WiFi network or WLAN. This network is getting popular nowadays with the feature of easy setup and no cabling involvement. You can connect computers anywhere in your home without the need for wires.
Fiber Optic Cable vs Wireless: Which One Is Better?
We are going to compare fiber optic cable vs wireless from below 3 aspects:
Theoretically, the wireless network can transmit data at the same speed as fiber optical cable. Practically, fiber optical cable can achieve higher maximum speed. When network becomes congested, the more users at one time who surf the Internet and share the same bandwidth, the more crowded and slower the wireless network will become. A wired Ethernet connection can notionally offer up to 10Gb/s if you have a Cat6 Ethernet cable. The exact maximum speed of your Ethernet cable depends on the type of Ethernet cable you are using.
Furthermore, the signal strength of wireless can be weakened over long distance. Fiber optic wire can convey a clear signal much farther. Take single mode fiber of wired network as an example, it is applied for wide-range data applications and commonly used in carrier networks, PONs, and MANs. In general, wired network offers quicker speed and longer distance transmission without interference and is more reliable than WIFI as well.
- Convenience of Installation
To install fiber network can be time consuming and quite complicated. Depending on the business environment and other variables, the process of installation of fiber network usually takes months. On the other hand, installing Microwave Fixed Wireless Internet only takes days and requires fewer resources.
Each coin has two sides. For fiber optic cable vs wireless, the network connection is no exception. Wired connection will provide more reliability and have less potential for interference. While wireless connection will offer greater flexibility and the ability to easily addition of devices to your network. It all depends on what you would like to do and how you want to use your connection. If you have any demands for products to set up a wired Internet, FS.COM would supply a variety of relevant fiber optic cables and other applications.