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Optimizing Converged Cisco Networks (ONT)

Optimizing Converged Cisco Networks (ONT). Module 2: Cisco VoIP Implementations. Lesson 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.

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Optimizing Converged Cisco Networks (ONT)

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  1. Optimizing Converged Cisco Networks (ONT) Module 2: Cisco VoIP Implementations

  2. Lesson 2.1: Introducing VoIP Networks

  3. 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.

  4. 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)

  5. Components of a VoIP Network

  6. Legacy Analog and VoIP Applications Can Coexist

  7. Legacy Analog Interfaces in VoIP Networks

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

  9. Digital Interfaces

  10. 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

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

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

  13. Distributed Call Control

  14. Centralized Call Control

  15. 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?

  16. 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.

  17. Q and A

  18. Resources • Waveform Coding Techniques • http://www.cisco.com/en/US/tech/tk1077/technologies_tech_note09186a00801149b3.shtml • VoIP Overview (NetBit) • http://www.cisco.com/warp/public/779/servpro/solutions/wireless_mobile/kbs/voip_kb.html • IP Telephony Basics http://www.intel.com/network/csp/resources/white_papers/4070web.htm

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