Application (in terms of cabling infrastructure) – systems supported by telecommunications cabling; includes Ethernet, Token ring, Fiber Distributed Data Interface (FDDI), and Asynchronous Transfer Mode (ATM)…
With increasing data types such as voice, video and data storage, the demand for increased transmission speeds will be boundless. If past trends are any indication then we can expect to see Ethernet architectures reaching into Petabytes within the next thirty years or so.…
The next evolution was Asymmetrical Digital Subscriber Line (ADSL). ADSL also utilizes the traditional POTS system, but utilizes frequencies that are not used for telephone voice. Creating an advantage over the 56k modem as the telephone can be used at the same time. Similar to its predecessor using the POTS system, but ADSL uses different modulation schemes i.e. PSK and PQSK. Most of the bandwidth is used upstream to the provider which allows the user the ability to watch low quality videos allowing the user more bandwidth faster downloads, although slower upload speeds. The disadvantages of ADSL are expenses, and ADSL was not available to everyone. The external modem and twisted pair cables were not common during ADSL’s timeframe. Providers also needed repeaters to reach homes making the product…
Ethernet Networks in Review Ethernet Cabling Data Encapsulation The Cisco Three-Layer Hierarchical Model Summary Exam Essentials Written Labs Review Questions Answers to Review Questions Answers to Written Lab 2.1 Answers to Written Lab 2.2 Answers to Written Lab…
Dedicated Circuit services allow you to lease circuits from those common carriers and then equipment is later installed to connect the computers and devices to the circuit. Equipment can include items such as multiplexers, a channel service unit or a data service unit. Connections that are made are point-to-point; mainly one building in one city to another building in that same city or a different one. The three basic architectures in these networks are ring, star and mesh; however they can be combined. One example of this is a distributed star architecture in which a series of star networks are connected by a ring/mesh architecture. Two types of dedicated circuit services used today are: T carrier services and synchronous optical network (SONET) services. Each of these has their own data link protocols. (Fitzgerald, 299-300).…
Fiber-to-the-home: “fiber-to-the-premises” FASTEST 300kbps. MORE EXPENSIVE. Internet and phone and TV carried over a fiber optic cable i.e. Verizon, Google Fiber. Problem: requires a contractor to lay a fiber-optic conduit directly to the home that can be costly and requires digging up in your lawn…
The storage area networking technology supported by Windows Server 2008 as a lower cost alternative to Fibre Channel is called…
The wire most use for LANs is a lot younger than fiber optics. Fiber use is over 20 years old, but computer networks on UTP cables have only been around for about 15 years. In that time, UTP has gone through at least 5 generations, each time to keep up with the incrementing bandwidth requisites of LANs; the ever evolving technology of LAN wire is hardly the “telephone wire” that the majority think of it as.…
6. When using cable Internet, the data transmission shares the cabling with what other technology?…
In early December of 1994 they introduced another way to link group of computers to a server with using fiber optic cables to increase performance quality with less interruption . With switching to fiber optic cables it was easier for computers to communicate. They were bottom floors and with Ethernet cables they were able to stretch to each floor of hospitals and campus buildings . With each new invention caused better connection speed and less miscommunication in offices. From this article I realize how much one fiber optic cord as its effect on speed. The cost may seem high but worth investing because we live in a society that needs information right now so the time I would take a person on the first floor to run to tenth floor using a fiber optic cord and connecting the computers you could have a own conversation and have everything you need in…
4.A paradigm for electronic communications where a message is broken up into blocks of data of limited size which are then transmitted one by one across the network is called:…
Fibre-optic telecommunications is simply a method of transmitting information from one place to another extremely fast. This is done by shooting pulses of light through an optical fibre. Creating the optical signal involving the use of a transmitter, relaying the signal along the fiber, ensuring that the signal does not become too distorted or weak, receiving the optical signal, and converting it into an electrical signal. An optic-fibre is a small fibre no thicker than a human hair, either made of glass or plastic that is transparent and flexible. The light inside the fibre-optic cable forms an electromagnetic carrier wave that is modulated to carry information. Fibre-optic telecommunications offers the longest and highest bandwidth (data transfer) of any other form of communication. The availability of fibre-optic technology has replaced a lot of the copper wire communications in core networks in developed countries. The modern day Fibre-optic cable was first developed by Gerhard Bernsee of Schott Glass in Germany in 1973. After this in the early 90’s a development of the photonic crystal-fibre these are much better because they have much higher power than the early glass fibre and also their wavelength-dependent can be manipulated to provide better performance. These were first available in 2000 and with this technology the first Fibre-Optic Telecommunications System was developed. Fibre optic telecommunications have three main uses the internet; optic fibres allow for an extremely fast bandwidth this is normally used by big companies and the government, digital television; optic fibre allows for a perfect quality at all times that never cuts out which is crystal clear and never cuts out, and finally telephones; Once again used for perfect quality between long distances it was the original use for fibre optic telecommunication. ‘The glass in optical fibres is…
There are currently two infrastructure types that are in use today. The first being Plesiochronous Digital Hierarchy (PDH), which was built on the three transmission standards identified as T-carrier (North America), E- carrier (Europe), and J-carrier (Japan). These transmission standards are commonly referred to as (T-X) for North American, (E-X) for European and (J-E) for Japanese, while the second transmission being Synchronous Digital Hierarchy (SDH) or Synchronous Optical Network (SONET) (Telecom and Network Speeds website, 2011).…
SONET described as the Synchronous Optical Network (SONET) was designed by the American National Standards Institute (ANSI) for the USA public telephone network in the mid-1980s. With the forced breakup of American Telephone & Telegraph (AT&T) in the United States this created numerous regional telephone companies. The companies quickly encountered network difficulties working together and alone. With the introduction of fiber optic cabling for long distance voice traffic transmission, the existing new networks created after AT@T breakup proved to be expensive to build and difficult to provide long haul data or video traffic.…
Metronet Bangladesh, a fibre optic based digital solution provider for data communication,launched in joint venture with Flora Telecom – in 2004…