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Fiber-Optic Local Area Network

DATE:2022-10-19   VISITS:115


Introduction of Optical Fiber Local Area Network:

As we know, a local area network or LAN is a geographically limited network designed for the local transmission of voice, data and video. Often referred to as a corporate network, a LAN is just one of many types of local area networks. It can be a small indoor network designed to connect IP devices, or a large network connecting multiple sites or buildings on a medical or university campus.


A local area network (LAN) is a computer communication network that connects various external devices such as computers, databases, printers, etc. within a local geographic range (such as companies, schools, hospitals, etc.). A traditional local area network (LAN) typically consists of Ethernet copper cables. Now, as more and more devices can access the network, traditional local area networks (LANs) face bottlenecks such as bandwidth and cabling space. In order to solve these series of problems, the optical fiber-based passive optical local area network (POL) came into being.

Want to know more about it, please contact bella@o-pf.com. We will be very willing to offer help.

How does a Local Area Network (LAN) work?:

A local area network (LAN), commonly referred to as a LAN, is a private network. They provide a useful way to share resources among end users. Resources such as printers, file servers, scanners, and the Internet are easily shared among other connected computers in the network.

A group of computers and related devices that share a common communication line or wireless link, and often the resources of a single processor or server within a small geographic area (eg, within an office building).

Typically, a server has application and data storage that is shared by multiple computer users. A local area network can serve as few as two or three users (eg, in a home network) or as many as thousands (eg, in an FDDI network).
LANs are distinguished from other kinds of networks by three characteristics:
a.Their transmission technology
b.Their size
c.Their topology



The difference between traditional local area network and passive local area network:

Traditional local area networks (LANs) are based on copper cables and have very limited bandwidth. The passive optical local area network (POL) is deployed through optical fibers, and the bandwidth has been greatly improved. Compared with a traditional local area network (LAN), a passive optical local area network (POL) has the following advantages:
1]Multi-service support: a single network can support the integration of various services such as WIFI, voice, data, CCTV, video surveillance, broadband Internet access, and security access control;
2]High reliability: carrier-grade equipment and a full range of redundant designs solve users' network stability problems; Unlimited bandwidth: The optical fiber network can meet the increasing demand for bandwidth in the future, and can be smoothly upgraded to 10G, 40G, or even higher without the need to transform the network.
3]Reduce energy consumption: According to statistics, a passive optical local area network (POL) can save about 40% of functional consumption;

Advantages and Disadvantages of LAN

1] Resource Sharing: LAN provides resource sharing such as computer resources like printers, scanners, modems, DVD-ROM drives, and hard disks can be shared within the connected devices. This reduces cost and hardware purchases.

2]Software Applications Sharing: In a Local Area Network, it is easy to use the same software in a number of computers connected to a network instead of purchasing the separately licensed software for each client a network.

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3] Data Security: Since data is stored on the server computer, it will be easy to manage data at only one place and the data will be more secure too.

4] Centralized Data: The data of all network users can be stored on a hard disk of the central/server computer. This helps users to use any computer in a network to access the required data.

5] Easy and Cheap Communication: Data and messages can easily be shared with the other computer connected to the network.

6] Data Security: Since information is held on the server pc, it'll be straightforward to manage information at only 1 place and therefore the information is going to be safer too.

7] Software Applications Sharing: During a Local Area Network, it's straightforward to use identical packages during a variety of computers connected to a network rather than buying the severally commissioned packages for every shopper on the network.

8] Centralized Data: The information of all network users will be held on a tough disk of the central/server pc. This facilitates users to use any pc during a network to access the specified information.

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9]Internet Sharing: Local Area Network provides the facility to share a single internet connection among all the LAN users. In school labs and internet Cafes, single internet connection is used to provide internet to all connected computers.

10]Internet Sharing: Local Area Network provides the ability to share one web affiliation among all the computer network users. In class labs and web Cafes, single web affiliation is employed to supply web to all or any connected computers.

But there are also some disadvantages:

1] High Setup Cost: The initial setup costs of installing Local Area Networks is high because there is special software required to make a server. Also, communication devices like ethernet cable, switches, hubs, routers, and cables are costly.

2] Privacy Violations: The LAN administrator can see and check the personal data files of each and every LAN user. Moreover, he can view the computer and internet history of the LAN user.

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3] Covers Limited Area: LANs are restricted in size; they cover a small area like a single office, single building or a group of nearby buildings.


4] LAN Maintenance Job: Local Area Network requires a LAN Administrator because there are problems such as software installations, program faults or hardware failures or cable disturbances in Local Area Network. A LAN Administrator is required to maintain these issues.

5] Data Security Threat: Unauthorised users can access important data of an office  or campus if a server hard disk is not properly secured by the LAN administrator.

Components of a Passive Optical Local Area Network (POL)

Passive Optical Local Area Network (POL) is composed of Optical Line Terminal (OLT), Optical Network Terminal (ONT), etc. This part mainly introduces the necessary components such as Optical Line Terminal (OLT), Optical Network Terminal (ONT), and Optical Splitter.

● Optical Line Terminal (OLT)

The optical line terminal (OLT) is located between the central office and the optical network terminal (ONT). Its function is to receive the downlink signal from the central office and transmit it to the optical network terminal (ONT), and receive the uplink from the optical network terminal (ONT). signal and send it to the central office.

● Connected Products

To connect network equipment, connection products such as fiber optic patch cords, network patch cords, and information panels are indispensable. Although these products may seem insignificant, they are of great significance to the normal operation of passive optical local area networks (POLs).

Optical splitter

The optical splitter is located between the optical line terminal (OLT) and the optical network terminal (ONT), and is used to evenly distribute the optical signal of the optical line terminal (OLT) to multiple end users. Optical splitters on the market now have a variety of packages and split ratios to choose from, the most commonly used is PLC optical splitter.

New types of optical fibers are emerging:

In order to meet the needs of the market, the technical indicators of optical fibers are constantly improving, various new optical fibers are emerging, and major companies are stepping up the development of new varieties.

New large-capacity long-distance optical fiber for long-distance communication Mainly some new G.655 optical fibers with large effective area and low dispersion maintenance, the PMD value is extremely low, which can easily upgrade the capacity of the existing transmission system to 10-40Gbit/s, and facilitate the use of distributed pulling on the optical fiber. The Mann effect amplifies, so that the transmission distance of the optical signal is greatly extended.

Is the above introduction solve your questions? Please contact us if you need the cables mentioned above. Our email address is bella@o-pf.com.

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