atm - 770 00438 2440-VHBE_ed01 Alcatel N.V. All Rights...

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1 770 00438 2440-VHBE_ed01 Alcatel N.V. All Rights reserved 2001
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2 770 00438 2440-VHBE_ed01 Alcatel N.V. All Rights reserved 2001 ATM in public Networks : an overview (1) ATM in public Networks : an overview (1) 1. The Evolution of ATM 2. ATM Technology Aspects 3. ATM Communications Protocols 4. ATM Signalling 5. Operations, Administration, Maintenance and Provisioning 6. Traffic Management
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3 770 00438 2440-VHBE_ed01 Alcatel N.V. All Rights reserved 2001 ATM in public Networks : an overview (2) ATM in public Networks : an overview (2) 7. IP over ATM 8. TCP over ATM 9. Voice over ATM
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4 770 00438 2440-VHBE_ed01 Alcatel N.V. All Rights reserved 2001 Course Material Course Material Power point presentation Book : ATM for Public Networks by Ronald H. Davis
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5 770 00438 2440-VHBE_ed01 Alcatel N.V. All Rights reserved 2001 Course Material Course Material ATM Network Switching Signalling Adaptation OAM & P QoS Traffic Management
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6 770 00438 2440-VHBE_ed01 Alcatel N.V. All Rights reserved 2001 Chapter 1 : The evolution of ATM Chapter 1 : The evolution of ATM B-ISDN Comparison of ATM with circuit switching and packet switching
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7 770 00438 2440-VHBE_ed01 Alcatel N.V. All Rights reserved 2001 The N-ISDN: Half - The N-ISDN: Half - integrated integrated Cable TV PSTN Internet Data N-ISDN Narrow (low Bitrates) Half Integrated (only access) 64 kbps based
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8 770 00438 2440-VHBE_ed01 Alcatel N.V. All Rights reserved 2001 The B-ISDN: Service The B-ISDN: Service independent independent - High High (data) bitrates - Flexible (data) bitrates - Flexible PSTN Internet DATA Cable TV B-ISDN High Bitrates multi service ATM based
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9 770 00438 2440-VHBE_ed01 Alcatel N.V. All Rights reserved 2001 Voice Network 300 3400 Hz Signal Strength Voice frequencies are 300 to 3400 Hz Double sampling (Nyquist): 8000 Hz Each sample is 1 byte long = 8 bits 8 bits . 8000 samples/s = 64 kbps 30 ••••• 13 1 0 30 ••••• 1 0 125 μ s 1 timeslot per voice call occupation of a fixed bandwith (64 kbps) granularity & variable bit problem not suited for (high speed) data traffic Not complex but not flexible !! Circuit Switching Circuit Switching
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10 770 00438 2440-VHBE_ed01 Alcatel N.V. All Rights reserved 2001 Compare ATM with Circuit Switching Compare ATM with Circuit Switching Typical TDM frame structure used in Circuit Switching : A fixed number of channels is multiplexed on 1 link Each channel is defined by its position in the frame structure ... Channel 0 Channel 1 Channel 2 Channel 31 ... Channel 0 Channel 1 Channel 2 Channel 31 Frame Timeslots or Channels
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11 770 00438 2440-VHBE_ed01 Alcatel N.V. All Rights reserved 2001 The use of Physical Circuits The use of Physical Circuits In Link Ch Out Link Ch 1527 1923 3 9 5 7 1 2
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12 770 00438 2440-VHBE_ed01 Alcatel N.V. All Rights reserved 2001 ATM uses Packets ATM uses Packets A variable number of channels is multiplexed on 1 link Each channel is defined by information in the header of the packet Packets or Cells Channel 5 Channel 8 Channel 31 Channel 5 Channel 5 Channel 5 Channel 45326
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13 770 00438 2440-VHBE_ed01 Alcatel N.V. All Rights reserved 2001 The use of Virtual Circuits The use of Virtual Circuits 1 2 In Link Ch Out Link Ch 1527 1923 9 3 5 7
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This note was uploaded on 08/08/2011 for the course CS 310 taught by Professor Aartisingh during the Spring '11 term at National Institute of Technology, Calicut.

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atm - 770 00438 2440-VHBE_ed01 Alcatel N.V. All Rights...

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