Search results “Principles of telecommunication”
Telecommunications Basics Part 1
In the first part of our series on telecommunications, Jim Gibson discusses the deregulation of the telecommunications industry and some of the basic technologies that power it.
Views: 142379 CableSupply.com
Telecommunication : Foundations of Telecommunication (05:01)
Telecommunication : Foundations of Telecommunication (05:01) We introduce the telecommunication series by looking as some fundamental concepts: the basics of electricity, analog signals, and digital signals. Links from video: -http://youtu.be/zYS9kdS56l8 -http://www.freemosquitoringtones.org/ Lesson 1 in our “Telecommunication” series. This is part of our Introduction to Computers lecture series. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Mr. Ford Class is one of the leading educational YouTube channels for anatomy and physiology, microbiology and computer training videos. Scott Ford, M. Ed. is an award-winning teacher with over 16 years in the classroom. His videos are used by public schools, private schools, colleges and trade schools around the world. All of his tutorials are now available for only $9.95/mo. at http://mrfordsclass.net/ or follow him on social media. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Come and follow me on Social Media ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Twitter: https://twitter.com/mrfordsclass Facebook: https://www.facebook.com/mrfordsclasslearning YouTube: https://www.youtube.com/mrfordsclass Instagram: http://instagram.com/mrfordsclasslearning Snapchat: mrfordsclass
Views: 16643 Mr. Ford's Class
ENP Session 4: Principles of Telecommunication
See the rest of our Emergency Number Professional Certification study sessions at www.co911rc.org
Views: 1383 CO911RC
Telecommunication Principles(TP) series-01 in Bangla
Telecommunication Principles is an important part of communication.. To get more tutorials subscribe my channel.
Views: 1 Dibjob IT
Lec 1 | MIT 6.450 Principles of Digital Communications I, Fall 2006
Lecture 1: Introduction: A layered view of digital communication View the complete course at: http://ocw.mit.edu/6-450F06 License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 259600 MIT OpenCourseWare
AM and FM Radio As Fast As Possible
AM & FM radio have been around since way before the digital age. How can radios decode AM & FM signals only using analog technology? Freshbooks message: Head over to http://freshbooks.com/techquickie and don’t forget to enter Tech Quickie in the “How Did You Hear About Us” section when signing up for your free trial. Follow: http://twitter.com/linustech Join the community: http://linustechtips.com
Views: 422291 Techquickie
Everything You Need to Know About 5G
Millimeter waves, massive MIMO, full duplex, beamforming, and small cells are just a few of the technologies that could enable ultrafast 5G networks. Read more: http://spectrum.ieee.org/video/telecom/wireless/everything-you-need-to-know-about-5g Today’s mobile users want faster data speeds and more reliable service. The next generation of wireless networks—5G—promises to deliver that, and much more. With 5G, users should be able to download a high-definition film in under a second (a task that could take 10 minutes on 4G LTE). And wireless engineers say these networks will boost the development of other new technologies, too, such as autonomous vehicles, virtual reality, and the Internet of Things. If all goes well, telecommunications companies hope to debut the first commercial 5G networks in the early 2020s. Right now, though, 5G is still in the planning stages, and companies and industry groups are working together to figure out exactly what it will be. But they all agree on one matter: As the number of mobile users and their demand for data rises, 5G must handle far more traffic at much higher speeds than the base stations that make up today’s cellular networks. Read more: http://spectrum.ieee.org/video/telecom/wireless/everything-you-need-to-know-about-5g
Views: 1239958 IEEE Spectrum
Introduction to Telephone Systems
Follow Eli on the Vlog Channel: https://www.youtube.com/user/EliComputerGuyLive Info Level: Beginner Presenter: Eli the Computer Guy Date Created: August 2, 2010 Length of Class: 54 Minutes Tracks Telephone Systems Prerequisites None Purpose of Class This class introduces students to the basic components of telephone systems. Topics Covered Public Switched Telephone Network Central Offices Trunk Lines PBX and Voicemail Systems PBX Stations Voicemail Subcribers Class Notes Introduction Telephone systems are not complicated if you understand how they work. A Word on VoIP VoIP is not a telephone system PSTN PSTN -- Public Switched Telephone Network is like the Internet, but for telephone communication NADP -- North American Dialing Plan -- Is the system for routing telephone calls. Central Office -- All telephone lines connect to a local central office Trunk Lines Every Trunk Line has a telephone number A Trunk Line allows for 1 incoming or outgoing call. You can have far more telephones in a building then you have trunk lines. Incoming Trunk lines are setup in Hunt Groups. If the main phone number is busy the call is automatically forwarded to the next number in the Hunt Group Incoming Hunt Groups are setup by your local telephone company. Outgoing calls can be routed to use selected trunk lines. This in configured in your PBX. PBX and Voicemail The PBX routes telephone calls The Voicemail system provides all audio messaging. (Voicemail boxes, Message Boards, and Auto Attendant Messages) Stations All devices that connect to the PBX are "Stations". This includes telephones, call boxes, intercom systems, etc. There are 2 types of stations; Analogue and Digital. Analogue and Digital stations have to be connected to appropriate ports on the PBX. An analogue phone cannot connect to a digital port and vice versa. Almost all fax machines and phones you buy at retail stores are analogue. If your new fax machine does not work it may be because it's plugged into a digital line. Subscribers Subscribers are users of the Voicemail system. Subscribers do not have to have stations Voicemail ports are the number of connections to the Voicemail system at any one time. This includes not just people retrieving their voicemail, but also incoming calls that connect to Auto Attendant messages. Final Thoughts Be careful before you touch! Most older telephone and voicemail systems were administered using a phone keypad, NOT and computer interface. If you mess something up it can be very difficult to rebuild a deleted Auto Attendant or such. Resources North American Numbering Plan PSTN -- Wikipedia
Views: 653724 Eli the Computer Guy
What is Cellular Network | Hand Off Concepts
Cellular network usage multiple transmitter to cover entire region. These transmitter can cover only a particular area which is known as cell. This video will discuss concepts of cellular network with hand off process.
Views: 93311 HowTo
Basics Of Communication System
A short video to explain the basics of a simple communication system. The block diagram is shown and each part is explained in a most simplified way. Although it could have been extended, but the purpose of this channel is to explain Engineering in minutes or if possible in one minute. I hope you like the video. Rate, Comment and Subscribe if you would like to see more of these in your news feed. Thanks. Find my Blog at - http://www.codefap.com Follow me on Google+ - http://www.gplus.to/omkar4 Follow me on Facebook - http://www.facebook.com/codefap Follow me on Twitter - http://www.twitter.com/codefap My YT Channel 1 - http://www.youtube.com/c0defap My YT Channel 2 - http://www.youtube.com/engineersminute Wallpaper Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 http://creativecommons.org/licenses/by/3.0/
Views: 69188 Engineers Minute
3G WCDMA (UMTS) Fundamentals-Spreading Principle
Presenter: Dr Moazzam Tiwana Website: drmoazzam.com This lecture of the concept of spreading in Wideband CDMA (WCDMA) or UMTS networks. We talk about spreading codes and how they work. What is the difference between bitrate and chip rate.
Views: 18606 Moazzam Tiwana
Subject:Hotel & Tourism Management Paper: Front Office Operations And Management
Views: 49 Vidya-mitra
Telecommunications 01/10 - Introduction structure regulation and competition in the telecom sector
01 - Introduction structure regulation and competition in the telecom sector Prof. Nicoletta Corrocher. The course aims at analysing the technological, economic and regulatory aspect of the telecommunications sector. In particular, it puts emphasis on the phenomenon of convergence and investigates the development of innovative products and services, the strategic management of different types of telecom firms and the emerging regulatory issues. The course adopts a micro-level perspective, by investigating the economics of the ICT and its impact on the emergence of new and profitable opportunities for creating value added contents for the final users. The course aims at analysing the technological, economic and regulatory aspect of the telecommunications sector. In particular, it puts emphasis on the phenomenon of convergence and investigates the development of innovative products and services, the strategic management of different types of telecom firms and the emerging regulatory issues. The course adopts a micro-level perspective, by investigating the economics of the ICT and its impact on the emergence of new and profitable opportunities for creating value added contents for the final users. Request your welcome kit at http://www.unibocconi.eu/welcomekit
Views: 48099 UniBocconi
Telecommunications (Introduction)
Outline: http://www.asecuritysite.com/subjects/chapter62
Views: 461 Bill Buchanan OBE
What is microwave
Michael Pangia, President and CEO of Aviat Networks, explains how microwave radio technology is used for high-capacity, extremely reliable point-to-point wireless communications.
Views: 18098 AviatNetworks
Mobile Communications
This EzEd Video Explains - Mobile Communications - Cellular Concept - Mobile Phone System - Features of Cellular Concepts - Frequency Reuse - Cell Splitting - Handoff Procedure - Global System for Mobile ( GSM )
Views: 184368 EzEd Channel
Satellite Communication - Defintion, Principle, Polar Circular orbit
Satellite Communication Satellite communication is the branch of telecommunication which establishes and communication using satellites across the globe.We can divide the whole satellite communication into two parts namely space segments and earth segments.Satellite communication uses highly sophisticated and secured communication methods and algorithms.In satellite communication we use microwave frequencies ranging from 1GHz to 40 GHz which is further divided into various bands.In satellite communication we use multiplexing techniques such as FDMA,TDMA,CDMA etc which enables the bandwidth utilization.In the process of design we have to consider many parameters such as path loss,propagation loss,noise factors,atmospheric loss etc. Checkout for more information: https://www.tutorvista.com/content/physics/physics-ii/space-exploration/communication-satellites.php Follow us at: https://www.facebook.com/tutorvista https://twitter.com/TutorVista
Views: 337772 TutorVista
Switching Methods - Circuit, Message and Packet Switching in Hindi
Switching Methods - Circuit, Message and Packet Switching in Hindi Data Communication and Networking Lectures in Hindi
Views: 154827 Easy Engineering Classes
Network Management Principles
This tutorial explains the principles behind Network Management and introduces the terms Manager, Agent, Management Protocol (such as SNMP), Management Information Base (MIB), polling and Distributed Management.
Views: 51839 FLAMINGO Project
Huawei Digital Microwave Communication Principles RTN
Huawei, Digital Microwave Communication Principles ,RTN Digital Microwave Communication Overview Digital Microwave Communication Equipment Digital Microwave Networking and Application Microwave Propagation and Anti-fading Technologies Designing Microwave Transmission Links
Networking : Evolution of SDH Technology
SDH (Synchronous Digital Hierarchy) is a standard technology for synchronous data transmission on optical media. It is the international equivalent of Synchronous Optical Network. Both technologies provide faster and less expensive network interconnection than traditional PDH (Plesiochronous Digital Hierarchy) equipment. In digital telephone transmission, "synchronous" means the bits from one call are carried within one transmission frame. "Plesiochronous" means "almost (but not) synchronous," or a call that must be extracted from more than one transmission frame. SDH uses the following Synchronous Transport Modules (STM) and rates: STM-1 (155 megabits per second), STM-4 (622 Mbps), STM-16 (2.5 gigabits per second), and STM-64 (10 Gbps).
Views: 12290 Maddy’s World
Telecommunications:  Multiplexing and Modulation
Views: 1721 Bill Buchanan OBE
Fiber optic cables: How they work
Bill uses a bucket of propylene glycol to show how a fiber optic cable works and how engineers send signal across oceans. More info at http://www.engineerguy.com. You can translate captions at http://www.engineerguy.com/translate
Views: 3461908 engineerguy
Lecture -7 Transmission of Digital Signal - I
Lecture Series on Data Communication by Prof.A. Pal, Department of Computer Science Engineering,IIT Kharagpur. For more details on NPTEL visit http://nptel.iitm.ac.in
Views: 163585 nptelhrd
Principles of Insurance
Thank you very much for viewing our video lectures. Join our Whatsapp Broadcast / Group to receive daily lectures on similar topics through this Whatsapp direct link https://wa.me/917736022001/?text=Subs... Also check out our Social Responsibility Campaign where students can enroll in our CA/CMA/CS/CFA/CIMA/ACCA/Banking related Online Courses under "PAY WHAT YOUR HEART FEELS" Scheme. It means students can decide how much to pay for each course by considering 1) Value they derive 2) Affordability 3) Our efforts gone into course creation. Preview courses here https://carajaclasses.com/ Enrollment Form under PAY WHAT YOUR HEART FEEL Scheme https://carajaclasses.com/PAYHEARTFEE... Also install our android app CARAJACLASSES to view lectures direct in your mobile - https://bit.ly/2S1oPM6 -Team CARAJACLASSES "Never stop learning, because life never stops teaching" Did you liked this video lecture? Then please check out the complete course related to this lecture, Advanced Accounting A Complete Studywith 450+ Lectures, 60+ hours content available at discounted price(10% off) with life time validity and certificate of completion. Enrollment Link For Students Outside India: https://bit.ly/2weNR0h Enrollment Link For Students From India: https://www.instamojo.com/caraja/adva... Our website link : https://www.carajaclasses.com Course Description Welcome to this course Advanced Accounting A Complete Study for CA / CMA / CFA / CS Students. As the name says, this course is structured keeping in mind academic curriculum of Advanced Accounting Paper meant for CA IPCC / CMA Inter / CS / CFA Students. In this course, you will learn advanced Accounting topics like a) Branch Accounts b) Departmental Accounts c) Accounting for Royalties d) Accounting for Hire Purchase Transactions e) Self Balancing Ledgers f) Sectional Balancing Ledgers g) Accounting for Service Sectors, Project Accounting, etc. h) Accounting for Service Sectors like Software, ITES, Telecommunication, Entertainment, Hospital, Educational Institutions. i) Accounting for Special Transactions - Bill of Exchange j) Accounting for Special Transactions - Consignment k) Accounting for Special Transactions - Joint Venture l) Accounting for Special Transactions - Sale of goods on Approval or Return Basis m) Accounting for Special Transactions - Account Current n) Accounting for Special Transactions - Investment Accounts o) Accounting for Special Transactions - Insurance Claim (Loss of Stock and Loss of Profit) p) Accounting for Banking, Electricity and Insurance Companies. This course is structured in self paced learning style. Theoretical back ground for each and every topic will be explained followed by numerous case studies and most of them will be past examination tested problems. Take this course and gain complete understanding of Advanced Concepts in Accounting and prepare confident-ally for Professional Course Examinations.
Frequency Division Multiplexing (FDM) and Time Division Multiplexing (TDM)/FDM and TDM Multiplexing
For More Detailed Knowledge and Lots of Interesting Stuff, You Should Visit My BLOG At Least Once- https://www.engineeringmadeeasypro.com/ This video explains the concepts of Frequency Division Multiplexing (FDM) and Time Division Multiplexing (TDM). Here You will understand what is the difference between Frequency Division Multiplexing (FDM) and Time Division Multiplexing (TDM) i.e (FDM vs TDM). We will also see here what is multiplexing and why the multiplexing used. Applications of multiplexing and types of multiplexing. you will get an idea about how time division multiplexing in computer networks and telecommunication used and how the frequency division multiplexing is used in telecommunication and computer networks. For more details you can visit my BLOG- http://www.engineeringmadeeasypro.com/ This video is created by Lalit Vashishtha, Founder and owner of 'Engineering Made Easy, YouTube Channel. . . Like my Facebook Page https://www.facebook.com/lalitvas/?ref=aymt_homepage_panel Visit My blog for more information https://www.engineeringmadeeasypro.com/ Join my Facebook Group https://www.facebook.com/groups/1865786296998316/ Join me on Google+ https://plus.google.com/collection/ohUqmB Follow me on reddit https://www.reddit.com/r/EngineeringMadeEasy/ PLAYLISTS on diffent Topics (Choose from the Large Collection of Videos) Random Variables and Probability Distribution https://www.youtube.com/playlist?list=PLDp9Jik5WjRtVUYHjx_Q0KohHqqDVKhcX Continuous Wave Modulation (AM, FM and PM) https://www.youtube.com/playlist?list=PLDp9Jik5WjRtjhcs_NJrhydaQ8H5zSWPw Laplace Transform (Basic to Advanced Level) https://www.youtube.com/playlist?list=PLDp9Jik5WjRv1K8TkyD1NtI3CwjjdQOVn Circuit Simulator (Electronic Circuits Animations) https://www.youtube.com/playlist?list=PLDp9Jik5WjRvDBiUXyGxhV4nH-0Y5uF8V Modulation Basics https://www.youtube.com/playlist?list=PLDp9Jik5WjRsXMtMxv80RTi-9Kvvo4Uvu Vectors Basics https://www.youtube.com/playlist?list=PLDp9Jik5WjRtaD_LBF-EzTjc9Yf98E5xh Optical Fibers (Basic to Advanced Level) https://www.youtube.com/playlist?list=PLDp9Jik5WjRuxzZArqomE59SFmhVv5qPO Electronics Fundamentals https://www.youtube.com/playlist?list=PLDp9Jik5WjRu-ntz8lYYI1XxD2RHQhqXH Signals and Systems https://www.youtube.com/playlist?list=PLDp9Jik5WjRswczwmEVUtsfMMJSBwdiqy Communication Systems (Analog and Digital ) https://www.youtube.com/playlist?list=PLDp9Jik5WjRuUyDT6961r8pkelgJMG8fG Pulse Modulation Techniques https://www.youtube.com/playlist?list=PLDp9Jik5WjRvjqQ6ruRFC6hZcxnOsp3BE Digital Modulation Lectures [HD] https://www.youtube.com/playlist?list=PLDp9Jik5WjRs5ismlsqP_Q3JNlWOe-2an GRAPHS (Basics to Advanced) https://www.youtube.com/playlist?list=PLDp9Jik5WjRupAy80mWcbYq-Z-krB1_04 GATE ACADEMY https://www.youtube.com/playlist?list=PLDp9Jik5WjRv7YnOIecOSLE_UG6wS8_zj Solved Numerical Problems in Engineering [HD] https://www.youtube.com/playlist?list=PLDp9Jik5WjRvrQe4a_kr7JLOS_DMREsUq Energy Bands in Solids [HD] https://www.youtube.com/playlist?list=PLDp9Jik5WjRuIS4hbKhxr7e1sueAboaQA
Views: 74334 Engineering Made Easy
Do you travel a lot? Get yourself a mobile application to find THE CHEAPEST airline tickets deals available on the market: ANDROID - http://android.theaudiopedia.com - IPHONE - http://iphone.theaudiopedia.com or get BEST HOTEL DEALS worldwide: ANDROID - htttp://androidhotels.theaudiopedia.com - IPHONE - htttp://iphonehotels.theaudiopedia.com What is TELECOMMUNICATION? TELECOMMUNICATION meaning - TELECOMMUNICATION pronunciation - TELECOMMUNICATION definition - TELECOMMUNICATION explanation - How to pronounce TELECOMMUNICATION? Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license.
Views: 14890 The Audiopedia
Telecommunications Module 1-- part 1 of 2
CIS 161 Fundamentals of Telecommunications
Views: 6158 ProfTedC
Optical Fibres in Communication: Covers all Important Points about Optical Fibre [HD]
For More Detailed Knowledge and Lots of Interesting Stuff, You Should Visit My BLOG At Least Once- https://www.engineeringmadeeasypro.com/ This lecture on optical fibre includes: 1- What is an optical fibre? 2- Structure and working of the optical fibre 3- optical fibre communication process 4- Types of optical fibers (Single Mode Fiber and Multi Mode Fibre) 5- Benefits of optical fibers 6-Losses in optical fibre 7-Dispersion in optical fibre 1.What is an Optical Fibre? For more details you can visit my BLOG- http://www.engineeringmadeeasypro.com/ An optical fiber is a flexible and transparent fiber which is made by drawing glass (silica) or plastic. Optical fiber has a diameter slightly thicker than that of a human hair. 2.Structure and Working of the Optical Fibre Optical fibers are made of glass or plastic. Most optical fibers used in communication have diameter of 0.25 mm to 0.5 mm including outer coating. Optical Fibre communication takes place between 0.8 micrometer to 1.7 micrometer of wavelength of electromagnetic spectrum. Optical fibres have a transparent core which is surrounded by a transparent cladding and the cladding has a protective covering over it. The image given below explains the concept of Total Internal Reflection (TIR) which is the phenomenon responsible for propagation of light inside the optical fibre. Based on the refractive index profile, there are two categories of optical fibres- #Step Index Optical Fibres #Graded Index Optical Fibres In step index fibres, the refractive index profile makes a step change at the core-cladding interface. In step index fibre if core has refractive index n1 and cladding has refractive index n2, then this condition holds- n1 greater than n2 And this is necessary condition for Total Internal Reflection (TIR) in the optical fibre. While the graded index fibres don't have a constant refractive index in the core but the refractive index of the core decreases with increasing radial distance from the core axis. It has maximum value of refractive index at the core axis that decreases as we move away from the core axis and becomes constant in the cladding. The light rays travel inside the core by the phenomena of total internal reflection. Since the core has higher refractive index (n1) than that of cladding (n2) So when the light rays fall on the core-cladding interface (moves from denser to rarer medium), it returns back into the core. But for the Total Internal Reflection (TIR) to take place, it is necessary for the light rays to have incidence angle greater than the critical angle while moving from denser to rarer medium (core to cladding). 3.Optical Fiber Communication Process Message that we want to transmit maybe non-electrical in nature (audio signal), so first of all it needs to be converted into electrical form using transducers. Now the message converted into electrical form modulates an optical source. Ex. LASER or LED. After this the light rays containing message travel through the optical fiber by the phenomena of total internal reflection. Due to total internal reflection the energy loss is negligible inside the fiber while travelling. Now at the receiving end, photodetectors like photodiodes or phototransistors etc, are used to convert the light signal back into electrical signal. Then the original message signal is retrieved from this electrical signal. 4.Types of Optical Fibres (Based on Modes of Propagation) There are two types of optical fibres based on modes of propagation - #Single Mode fibres (SMF) #MultiMode fibres (MMF) As clear by the name itself, the single mode fibres support only one propagation path, since they have very small diameter. While multimode fibres can support many propagation paths or transverse modes as they have larger diameter. Single mode fibres are used for long distance communication while multimode fibres for short distance communication. Single mode fibre provide greatest transmission bandwidth and lowest losses in communication. 5.Benefits of Optical Fibres #Energy loss is negligible inside the optical fibres while propagation due to total internal reflection. #Optical fibres provide very large potential bandwidth (since optical communication takes place at very high frequency. #Optical fibres have small size, are lightweight and very flexible. #Optical fibres provide electrical isolation and are shock resistant. Since inside the fibre, light propagates; not any electric current. #Optical fibers provide high degree of signal security since these fibres do not radiat #Optical fibres are easy to maintain and the communication system is reliable. 6.Losses in Optical Fibres. These losses are the following- #Material absorption #Linear and nonlinear scattering #Fibre bend losses 7.Dispersion in optical fibres When light rays travel through the fiber, the phenomena of dispersion (broadening of transmitted light pulses), The dispersion is of two types- #Intermodal Dispersion #Intramodal Dispersion
Views: 101187 Engineering Made Easy
The theory and operation of early radio
Views: 274252 TheShootingstar31
Basic Antenna Fundamentals
Basic Antenna Fundamentals Antennas are a very important component of communication systems. By definition, an antenna is a device used to transform an RF signal, traveling on a conductor, into an electromagnetic wave in free space. Antennas demonstrate a property known as reciprocity, which means that an antenna will maintain the same characteristics regardless if it is transmitting or receiving. Most antennas are resonant devices, which operate efficiently over a relatively narrow frequency band. An antenna must be tuned to the same frequency band of the radio system to which it is connected, otherwise the reception and the transmission will be impaired. When a signal is fed into an antenna, the antenna will emit radiation distributed in space in a certain way. A graphical representation of the relative distribution of the radiated power in space is called a radiation pattern.
Views: 62792 Dan Vanevenhoven
What is WDM (Wavelength Division Multiplexer)? - FO4SALE.COM
http://www.fiberoptics4sale.com WDM stands for Wavelength Division Multiplexing. WDM is the most important and most popular method to increase the capacity of a single strand of fiber. As we all have learned from elementary school science, a white light beam can be separated into individual colored light beams by a prism, as shown in this picture. Vice versa, individual colored light beams can also be combined into a single white light beam by the prism, that is if we use the prism in the reverse direction. WDM uses this same idea. Traditionally, only one colored light was used on a single strand of fiber to carry the information, such as 1550nm light. However, starting from the early 1990s, the Internet boom pushed service providers to find a method to increase the capacity on their network in the most economical way. That is when WDM devices were invented. As shown in the right side picture, in a WDM system, many different colored lights are combined by a WDM multiplexing device and put into a single strand of fiber, each color is called a channel. On the receiving side, each color is separated into its own channel by a WDM de-multiplexing device. It shows that a single fiber's capacity is increased by 40 times with a 40 channel WDM. The beauty of WDM is that you only need to upgrade the end equipment, no need to dig up trenches to bury more fibers, which is much more costly. So how are WDM devices made? This picture shows a 3 channel WDM device based on thin-film filters. Thin-film filters are a piece of flat surface glass with optical coatings on it. The optical coatings are designed to pass and reflect certain colored lights. This is a de-multiplexing WDM device, which means that it separates combined colored lights from a single fiber into separate individual fibers. But if used in the reverse direction, it can also combine different colored lights from individual fibers into a single fiber. As shown, three colored lights, which are 1510nm, 1530nm and 1570nm, come from a single strand of fiber 1. The GRIN lens collimates the light so it won't diverge into a large un-controlled beam. Filter 1 is designed to pass 1530nm and 1510nm, but reflect 1570nm. So when the light hits filter 1, 1570nm is reflected and re-focused into fiber 2 by the GRIN lens. Now the light has 1530nm and 1510nm in it, and it keeps going until it hits filter 2. Filter 2 is designed to pass 1510nm but reflect 1530nm, so 1510nm light passes and is focused into fiber 3 by the 2nd GRIN lens. On the other hand, 1530nm light is reflected by filter 2, passes filter 1 again, and is focused into fiber 4 by the 1st GRIN lens. Why isn't 1530nm focused into fiber 2? That is because the filters have a thickness, so there is a offset on the vertical direction. We just talked about a 3 channel WDM device. Thin-film filter based WDMs can be cascaded together to get higher channel counts, such as 4, 8, 16, 32 channels. The right side picture shows a 8 channel WDM device. The left picture shows how it's made by cascading several WDMs together. In additional to thin-film filter based WDMs, there are also fused fiber based WDMs, Arrayed Waveguide Grating based WDMs, Interleaver based WDMs, etc. They use different mechanisms to separate the colored lights. So there you have it. Please don't forget to visit http://www.fiberoptics4sale.com for more free fiber optic tutorials. I will see you in the next video!
Views: 164400 FOSCO CONNECT
Wireless Telecommunications Course: Cellular to LTE, WiFi and Satellite
Set to HD and full screen... or watch in full quality at teracomtraining.com: http://www.teracomtraining.com/online-courses-certification/samples/course-l2106-introduction-wireless-telecommunications.htm Online Course L2106: Wireless Telecommunications 10 interactive multipart lessons, multiple-choice exam and certificate. Produced 2012. Mobility • Cellular Networks • GSM and TDMA • UMTS and 1X CDMA • LTE • WiFi • Satellite Wireless Telecommunications is a comprehensive course on wireless, mobile telecommunications plus wireless LANs and satellites. You'll gain a solid understanding of the key principles of wireless and mobile networks: • Coverage, capacity and mobility • Why cellular radio systems are used • Mobile network components and operation • Registration and handoffs • Digital radio • Data over cellular • Cellular technologies and generations: - 1G analog FDM - 2G GSM and IS-136 TDMA - 3G UMTS and 1X CDMA - 4G LTE OFDM Plus, you'll receive an overview of the radio frequencies and standards for wireless LANs and an overview of satellite communications. The objective of this course is to develop a solid understanding of mobile communications networks and technologies. We'll cut through the jargon to demystify wireless, explaining the jargon and buzzwords, the network, technologies, the underlying ideas, and how it all works together... in plain English. Course Outline 1. Introduction (watch now) Course introduction and overview. Basic radio principles, analog and digital over radio. 2. Mobile Network Components, Jargon and Basic Operation Handset, base station, airlink, handoffs, connection to wireline systems 3. Cellular Principles and AMPS (1G) Coverage, capacity and cellular radio systems, mobility, spectrum, FDM spectrum sharing 4. 2G: Digital Radio - Voice Communications Components and operation of a digital radio: microphone, codec, RF modem, antenna 5. Digital Cellular: Data Communications Using only the RF modem and antenna of the cellphone as a "tethered" modem for another device 6. Spectrum-Sharing Technologies: FDMA, TDMA, CDMA, OFDM Sorting out the generations and standards; GSM and IS-136 TDMA vs. CDMA and OFDM 7. 3G Cellular: CDMA (watch now) Basic ideas behind CDMA and its operation; 1X vs. UMTS standards 8. 4G Mobile Cellular: LTE Steve Jobs ends the standards wars; OFDM basic principles of operation 9. 802.11 Wireless LANs - WiFi Basic principles of operation, 802.11 standards, frequency bands and limitations 10. Communication Satellites Basic principles of operation, geosynchronous and LEO 11. Multiple-Choice Exam Course Objectives: What You Will Learn The objective of this course is to develop a solid understanding of mobile cellular communications networks and technologies. After taking this course, you will be up to speed on the fundamental principles of cellular radio networks, components and operation, digital radio, spectrum-sharing technologies and the four generations of mobile cellular technology. An additional objective is a basic understanding of WiFi and satellites. In particular, on completion of this course, you will be able to explain: • The principal components of a mobile communication system • Coverage, capacity and mobility • The reason for and basic layout of a cellular radio system • Basic operation of a mobile network including registration and handoffs • How digital cellular is implemented • How digital cellular can be used for data communications, either as a tethered modem or using the phone as a data terminal • The principles and operation of the different spectrum-sharing technologies: first-generation FDMA, second-generation GSM and TDMA, third-generation UMTS and 1X CDMA and fourth-generation LTE and its OFDM • The different radio bands and standards for 802.11 wireless LANs • The two main types of communication satellites and their advantages and disadvantages.
Principles of Transmission
This is a short video talking about cable shielding
Introduction to Telecommunications, Lecture 1
by Szymon Machajewski
Views: 23922 Szymon Machajewski
What is Pulse Code Modulation (PCM)
http://www.fiberoptics4sale.com/wordpress/what-is-pulse-code-modulation-pcm/ http://www.fiberoptics4sale.com/wordpress/ In a brief sentence, pulse code modulation is a method used to convert an analog signal into a digital signal. So that it can be transmitted through a digital communication network, and then converted back into the original analog signal. The PCM process includes three steps: Sampling, Quantization, and Coding. In the sampling process, the magnitude of the analog signal is sampled regularly at uniform intervals. The obtained values are called samples. For a 4 kHz voice channel, the sampling rate is 8000 Hz, which means the signal is sampled 8000 times per second. The samples will then be converted to digital numbers as we will see in the quantization process. Quantization is the process of converting the obtained samples into discrete digital values. The most basic type of quantization is called uniform quantization. In an uniform quantization, the vertical axis, which represents the amplitude, is divided into equal sized steps. As shown in this figure, the range between 1 volt and -1 volt is divided into 16 steps, each step represents 0.125 volt. All the samples whose amplitude falls within an step, take the same step value. However, the quantization process introduces an error. This is because that the real amplitude of a sample is replaced by an approximate value. This error is called quantization noise or quantization distortion. In uniform quantization, the quantization distortion presents a problem. For example, let's assume a quantization error of 0.05 volt, if this happens at a high level signal, such as 5 volt, the noise ratio is 0.05 volt divided by 5 volt, which is 1%, not too bad. But if the same quantization error happens at a low level signal, such as 0.5 volt, the noise ratio is 0.05 volt divided by 0.5 volt, which is 10%. Simply put, for uniform quantization, the signal to noise ratio is good at high level signals, but bad at low level signals. That is why non-uniform quantization was introduced. In non-uniform quantization process, the steps are not of equal size. Small steps are used for small signal values and large steps for large values. The purpose of doing so is to achieve that the signal-to-noise ratio is nearly independent of the signal level. This is done by favoring low-level voice over higher-level voice. In other words, more code groups are assigned to speech at low levels than at the higher levels, progressively more as the level reduces. This is shown in this figure. There are two types of non-uniform quantization methods in popular use today. They are the A-law and the u-law. Let's first look at the A-law. A law follows the logarithmic formula listed here, with A equals to 87.6. We can see that the curve consists of linear piecewise segments, seven above and seven below the origin. The segment just above and the segment just below the origin consists of two linear segments. Counting the collinear elements by the origin, there are 16 segments. Each segment has 16 8-bit PCM codes assigned. These are the codewords that identify the voltage level of a sample at some moment in time. Each codeword, often called a PCM "word", consists of 8 bits. The first bit tells the receiver if the sample is a positive or negative voltage. We can see that all PCM words above the origin start with a binary 1, and those below the origin start with a binary 0. The next 3 bits in sequence identify the segment. There are eight segments above the origin and eight below the origin. The last 4 bits, shown as XXXX, indicate exactly where in a particular segment that voltage line is located. The second is called u-law. It follows the logarithmic formula listed here with u equals to 100. The North American T1 system uses the u-law quantization and coding process. The process is similar to that of A-law. Colin Yao Sales Manager Fiber Optics For Sale Co. 1532 Centre Pointe Dr. Milpitas, CA 95035 Web: http://www.fo4sale.com
Views: 223813 FOSCO CONNECT
Multiple Access - FDMA/TDMA/CDMA/OFDMA in 4G LTE Multiplexing is the process of combining multiple signals and transmitting them over a common channel and it is implemented on telecommunication using Multiple Access as a Application. Here, Multiple Access is explained with the example of Wi-Fi Hotspot sharing its internet connection among multiple users by providing them a frequency block over which they can transmit and receive data. The greater the size of this block, greater is the throughput. There are several way by which we can use Multiple Access Technique such as TDMA, FDMA, CDMA, W-CDMA, SDMA, OFDMA, SCMA. We have also mentioned, How TDMA and FDMA, CDMA, W-CDMA works and implemented in Earlier Generation system which is AMPS, GSM, GPRS, EDGE, UMTS, HSPA+. To overcome issues faced in earlier generation such as, - Low Throughput - Low Spectral efficiency - Resource wastage and many more, We have introduce next Generation Multiple Access technique which is already deployed in WIFI and in WIMAX, but due to lack of backward compatibility and support for Mobile communication in WiMAX, Operator started to working OFDM to include in LTE. Below is the link for all the fundamentals, https://www.youtube.com/playlist?list=PLE6yE0jB6BTOY6Z1DKEkQ8yZ8fFPUiCD8 Reference:- Content - 1. Wikipedia 2. Radio Electronics 3. http://www.wiley.com//legacy/wileychi/sesia_theumts/ 4. Other Web Sources Music - Bensound, Google youtube audio library Vector Images - Open Library, Openclipart Gallary Happy Learning.
Views: 384676 LTE
Telecommunication and Network system new 2014
components of a telecommunication system | history of telecommunication and network | infotech telecommunication and network inc | introduction to telecommunication and network | telecom network overview | telecommunication and network engineering | telecommunication and network management | telecommunication and network security | telecommunication and network security | telecommunication and network security cissp | telecommunication and network systems | telecommunications components | telecommunications network architecture | what is a telecommunication and network infrastructure | what is telecommunication and network
Views: 2359 Jsmart Kosal
Telecommunications Engineering - Michael Heimlich
Michael will speak about the history of telecommunication in terms of the trade off between frequency and data rate. In addition to this he will also discuss transmission time and noise, including the concept of modulation and how different physical technologies are needed to go from one data rate to higher and higher data rates. Professor Michael Heimlich is an Electrical Engineer and has worked for 25 years in industry before joining Macquarie University in 2009 as a CoRE Professor in the Department of Engineering. Mike’s research interests include wireless circuit design, software engineering of design automation systems, and antennas made from exotic materials, like carbon nanotubes. When he’s not teaching or working on his research, Mike mentors high school robotics teams.
Views: 9012 BridgesToHigherEd
Introduction to Data Communication
Information Technology - Applications and Implications of Information and Communication Technology Associated files with this video can be found on: Questions: http://www.e-ljam.net/moodle/course/view.php?id=57 NB: You will be requested to create an account.
Views: 68828 elearnja
What is customer service ? The 7 Essentials To Excellent Customer Service
Want access to David's New, in-depth customer service training? Visit http://www.purecustomerservice.com/p/youtube and enroll in the Pure Customer Service Training Program today! In this YouTube Video, learn "What is customer service? The 7 Essentials To Excellent Customer Service" in this complimentary video series from business coach and consultant, David Brownlee. CEO of Pure Customer Service and founder of www.PureCustomerService.com and The Pure Customer Service Training Program, 8 Secrets To Create Raving Fan Clients. Call or email us today to find out we can help grow your business through coaching, consulting or our training programs www.PureCustomerService.com Customer service is more than waiting on customers. It includes trying to exceed customer expectations. More common retail and customer service interview questions and sample answers are a good place to start. Customer service is the service provided to customers before, during and after purchasing and using goods and services. Good customer service provides an avenue for follow up. Customer service is the provision of service to customers before, during and after a purchase. According to David Brownlee and the www.purecustomerservice.com "Customer service is a series of 7 essentials to excellent customer service. Mar 2, 2013 -- Customer service is the practice of providing customers with a positive, helpful experience. Good customer service must include 7 essentials and a great customer service training company like davidbrownlee.com. For the Institute of Customer Service "Customer service is the sum total of what an organization does to meet customer expectations and produce customer satisfaction. Customer service is important because customer service does more than simply provide a means to drive sales. It is also said that when companies have a stong customer service program, customers keep coming back. Definition of customer service: All interactions between a customer and a product provider at the time of sale, and thereafter. Customer service adds value to a customer and their overall experience with your company. Can you answer these Sales and Customer Service questions? I am handling a training session on customer service for the public works department of a city near you. The enhancement of customer service is the driving force behind the redefinition project. It is important to David Brownlee and Associates that all staff know the 7 essentials to excellent customer service. Why Is Excellent Customer Service So Rare? Five Needs of Every Customer. External and Internal Customers. Customer Attributes. Cost of Losing a Customer can be huge. A customer service advisor, or CSA, (also customer service associate and customer service representative) is a generic job title in the service industry. It covers a broad spectrum of jobs. Customer care involves putting systems in place to maximize your customers' satisfaction with your business. Sales and profitability rely on ensuring your customer loyalty. Feb 6, 2013 -- David Brownlee also blogs here. "Customer Service is about creating a relationship of trust and loyalty with customers that transcends the interaction of the company and their clients. Customer Care refers to systems in the business place that will maximize your customers' satisfaction with your business. Learn more now! (800) 299-3449. May 5, 2013 -- Customer service is helping a customer with any issues or concerns they may have on a product or anything else relating to the place at which you find yourself and your company. Jan 25, 2013 -- Many marketers are evaluating what role customer experience and customer service should have in their 2013 marketing goals. The answer is easy. www.purecustomerservice.com Mar 7, 2012 -- The ultimate guide to the question: What Is Customer Service? 19 experts from customer service, small business, and marketing share their expertise. Customer service handles company issues in stores, over the phone and even by email. Companies that produce highly technical products, such as software or hardware need to do an exceptional job. Oct 5, 2012 -- "I can't get in touch with my customer service rep is something you hear all too often. I need to talk to someone about my bill. Please call me." David Brownlee (800) 299-3449 can answer all of your customer service training questions. Some surprising studies, stories, and documentaries have come out about customer service, and they could change the way you run your business. Experts from www.purecustomerservice.com are awesome.
Views: 767137 CoachDavidBrownlee
Introduction to Telecommunication Technologies.mp4
Module 3 Lecture Part 1
Views: 4880 elifyilmaz4
Telecommunication : Computer Networks (part 1) (05:04)
Telecommunication : Computer Networks (part 1) (05:04) We take a look at types of computer networks. In part 1 we look at network topologies: bus, ring, star, and mesh. Lesson 4 in our “Telecommunication” series. This is part of our Introduction to Computers lecture series. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Mr. Ford Class is one of the leading educational YouTube channels for anatomy and physiology, microbiology and computer training videos. Scott Ford, M. Ed. is an award-winning teacher with over 16 years in the classroom. His videos are used by public schools, private schools, colleges and trade schools around the world. All of his tutorials are now available for only $9.95/mo. at http://mrfordsclass.net/ or follow him on social media. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Come and follow me on Social Media ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Twitter: https://twitter.com/mrfordsclass Facebook: https://www.facebook.com/mrfordsclasslearning YouTube: https://www.youtube.com/mrfordsclass Instagram: http://instagram.com/mrfordsclasslearning Snapchat: mrfordsclass
Views: 7027 Mr. Ford's Class
Top 30 Wireless Communication -1 ece Interview Questions and Answers Tutorial for Fresher Beginners
Top 30 Wireless Communication -1 ece Interview Questions and Answers Tutorial for Fresher Beginners wireless communication interview questions pdf wireless communication interview questions answers pdf free download mobile communication interview questions mobile communication interview questions pdf mobile communication interview questions and answers for freshers wireless interview questions and answers wireless communication interview questions and answers pdf wireless communication basic interview questions interview questions for wireless communication interview questions in wireless communication technical interview questions wireless communication wireless communication interview questions with answers what is wireless communication pdf what is wireless communication ppt what is wireless communication in hindi what is wireless communication technology what is wireless communication definition what is wireless communication network what is wireless communication standard what is cell in wireless communication what is cdma in wireless communication what is cooperative communication in wireless networks what is duplexing in wireless communication what is diffraction in wireless communication what is dsss in wireless communication what is diversity in wireless communication ppt different types of transmission impairments explain different types of transmission impairments describe the different types of transmission impairments various types of transmission impairment in detail types of transmission impairment types of transmission impairments in data communication types of transmission impairment pdf different types of transmission impairment various types of transmission impairments 3 types of transmission impairment difference between 3g and 4g difference between 3g and 4g sim difference between 3g and 4g technology difference between 3g and 4g mobile difference between 3g and 4g lte difference between 3g and 4g network technology difference between 3g and 4g sim card difference between 3g and 4g lte difference between 3g and 4g uk difference between 3g and 4g pitches blocked call cleared system explain cell splitting and sectoring explain cell splitting and when it may be used define splitting cells in excel explain split cell option of table definition of cell splitting definition of splitting cells in excel multiple access techniques ppt multiple access techniques in satellite communication multiple access techniques for wireless communication pdf multiple access techniques in satellite communication ppt multiple access techniques nptel multiple access techniques tutorial multiple access techniques used in gsm basic multiple access techniques ppt difference between multiple access techniques comparison between multiple access techniques ofdm based multiple access techniques comparison between different multiple access techniques multiple access techniques are required in wireless networks because multiple access techniques comparison multiple access techniques cdma multiple access techniques cellular systems multiple access techniques computer networks orthogonal frequency division multiple access technique synchronization techniques for orthogonal frequency division multiple access frequency division multiple access techniques frequency division multiple access fdma technique time division multiple access techniques code division multiple access techniques in optical fiber networks code division multiple-access techniques in optical fiber networks—part i fundamental principles code division multiple access techniques in optical fiber networks i fundamental principles code division multiple access techniques in optical fiber code division multiple access techniques code division multiple access cdma technique fast and slow frequency hopping fast and slow frequency hopping spread spectrum compare fast and slow frequency hopping difference between fast and slow frequency hopping what is fast and slow frequency hopping fast frequency hopping and slow frequency hopping Placement Papers,Test Pattern,Placement Paper, Interview experience,Campus Placement Process, Placement Papers with Solution,Technical, hr Interview tips, Questions and Answers,aptitude papers,company details,pdf,for cse,ece,eee,Interview Experience and Selection Process,online Aptitude Test,bpo interview questions,Interview Puzzles,Company Profile.Learn and practice Aptitude questions and answers with explanation for interview, competitive examination and entrance test,aptitude,questions, answers, interview, placement, papers, engineering, interview videos,tips,videos for freshers,questions,prank | tips interview videos for freshers | of great personalities | attitude is everything technical support interview questions and answers for freshers | cse |ece technical manager interview questions and answers, technical For more details visit: http://www.wikitechy.com/
Views: 16985 Wikitechy

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