telecommunications introduction to telecommunication issues
Post on 21-Dec-2015
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TRANSCRIPT
Bandwidth
Last Mile delivery
Ownership
Fat or Thin Clients
Content
Retail and Business-to-Business
Digital Superhighway
UNDERCON-
STRUCTION
Telecommunications History
• Pre 1984Local and long distance monopoly
• 1984 AT&T settlementIntense long distance competition
• 1996 Telecommunications ActLocal access competition
Bandwidth
Telephone Changes
• Rapidly decreasing long distance rates
• Value added telephone services
• Cellular access
• Flat rate long distance?
• Internet access
Telephone• Reserved
processing
• 56.6 Kb/sec data speed
• All traffic follows same route
• Route determined when call made
• Delay critical
Internet• Best effort
processing
• Speed depends on traffic
• Packets follow different routes
• Routes determined as packets sent
• No delay control
Bandwidth Needs
• Voice: 56.6 Kbs
• Data: 30KB = 4.2 sec
• Image: 500KB = 70.7 sec
• Video: 500 Kbs (heavily compressed)
• Standard voice
• Integrated Services Digital Network
• Digital Subscriber Lines
• Cable Modem
• Direct network connection
• Who controls the desktop
• Standardization and version management
• Distribution
• Payment for access
Desktop Control