Telecommunications - Information System - Lecture Slides, Slides of Information Systems

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Networks, Telecommunications, and Mobile Technology

The Telecommunications Revolution

 It began with the deregulation of AT&T in 1986  AT&T sold long distance  7 baby bells were formed  Since then, there has been much M & A activity  At this point, it was all POTS  Sprint was formed and sold long distance  MCI was formed and sold long distance  Natural gas pipeline companies and others selling bandwidth  Cable TV is not just for television anymore  VOIP (Vonage, Skype and others)

Key Terms (1)

 Telecommunication system - enable the transmission of data over public or private networks

 Network - a communications, data exchange, and resource-sharing system created by linking two or more computers and establishing standards, or protocols, so that they can work together

Key Terms (2)

 Local area network (LAN) - is designed to connect a group of computers in close proximity to each other such as in an office building, a school, or a home.

 Wide area network (WAN) - spans a large geographic area, such as a state, province, or country

 Metropolitan area network (MAN) - a large computer network usually spanning a city

The Internet Revolution

 The Internet changes everything (Jeff Bezos – Amazon.com)

 The Internet changes nothing (Len Bosac - Cisco)

Metcalfe’s Law

 The usefulness of a network equals the square of the number of users

 2,300,000,000(2,300,000,000^ –^ 1)

Voice Over IP

 Skype was one of the first

 Vonage

 AT&T and Cable providers

 Cisco

 Many companies use VOIP to reduce telephony charges

Voice Over IP (Illustration)

Types of Channels

 Physical

 Twisted pair 2MB to 100MB  Coax (Ethernet) 200MB to 500mb  Fiber 320+ GB

 Wireless

 Microwave 200MB  Satellite 200+MB  Bluetooth (1MB)

Network Security

 Encryption

 Dedicated (leased) lines

 VPN

Mobility (Examples)

 FedEx and UPS hand-held devices (real-time wireless connections)

 Budweiser (Hand-held devices with docking stations)

 Season pass scanners

Cell Phones and PDAs

 In 10 years, the PC might be obsolete

 Blackberries have permeated business

 The iPhone

 A 25 billion dollar industry in apps

 Bandwidth allows for the convergence of voice, video, and data

The Cellular Revolution

Satellite Technologies

 They use microwaves

 Terrestrial microwaves  Geosynchronous satellites

 Require line of sight

 Good for remote locations

 Slow upload speeds

 Iridium http://www.iridium.com/