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2.1 - Introducing VoIP Networks

2.1 - Introducing VoIP Networks. Objectives. Describe the benefits of a VoIP network. Describe the components of a VoIP network. Describe the legacy analog interfaces used in VoIP networks. Describe the digital interfaces used in VoIP networks. Explain the 3 phases of call control.

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2.1 - Introducing VoIP Networks

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  1. 2.1 - Introducing VoIP Networks

  2. Objectives • Describe the benefits of a VoIP network. • Describe the components of a VoIP network. • Describe the legacy analog interfaces used in VoIP networks. • Describe the digital interfaces used in VoIP networks. • Explain the 3 phases of call control. • Compare and contrast distributed and centralized call control.

  3. Benefits of a VoIP Network • More efficient use of bandwidth and equipment • Lower transmission costs • Consolidated network expenses • Improved employee productivity through features provided by IP telephony: IP phones are complete business communication devices. Directory lookups and database applications (XML) • Integration of telephony into any business application • Software-based and wireless phones offer mobility. • Access to new communications devices (such as PDAs and cable set-top boxes)

  4. Components of a VoIP Network

  5. Legacy Analog and VoIP Applications Can Coexist

  6. Legacy Analog Interfaces in VoIP Networks

  7. Legacy Analog Interfaces in VoIP Networks 5 1 3 2 4 1

  8. Digital Interfaces

  9. Call Setup • Checks call-routing configuration • Determines bandwidth availability If bandwidth is available, setup message is passed If bandwidth is not available, busy signal is generated

  10. Call Maintenance • Tracks quality parameters: Packet loss Jitter Delay • Maintains or drops call based on connection quality

  11. Call Teardown • Notifies devices to free resources • Resources are made available to subsequent calls

  12. Distributed Call Control

  13. Centralized Call Control

  14. Self Check • Which type of call control uses a call agent to route the call? • What is a DSP? • Name 3 types of analog interfaces used at gateways. • What are the 3 components of basic call control? • What phase of call control involves determining if bandwidth is available to place the call?

  15. Summary • The benefits of a VoIP network include more efficient use of network bandwidth and equipment, lower cost and consolidated expenses. • Legacy analog and VoIP applications and devices can coexist. • The 3 stages of a VoIP call include call setup, call maintenance, and call teardown. • VoIP can be deployed in a centralized or distributed environment.

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