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  • Introduction to Voice over Internet Protocol (VoIP)
    • Voice over Internet Protocol (Voice over IP, VoIP) is a set of transmission technologies and communication protocols that enable voice calls to be carried over the Internet Protocol (IP) networks, such as the Internet, Intranets and Local Area Networks (LAN) rather than the traditional telephone landline system, (the Public Switched Telephone Network or PSTN).

      Here the voice signals are digitized, compressed and converted to IP packets and then transmitted over the IP network.

      Whereas calls over the PSTN are metered, so the user pays for the amount of time taken by their call, Internet usage is not metered. The user pays a set fee for their Internet service and their VoIP service and can then use the Internet to get free phone calls to other users on the same VoIP service, or pay a small fee to call users on other VoIP services or on the PSTN.

      VoIP service is absolutely free on private networks including Intranets and Local Area Networks (LAN).

      The potential for very low-cost or free voice calls is driving the use of the technology but in the long term, VoIP is more significant than just free phone calls, as it represents a major change in telecommunications.

      VoIP has developed considerably in recent years and is gaining widespread public recognition and adoption through consumer solutions’ strategy of moving to an IP-based network.

      The fact that VoIP transmits voice as digitized packets over the Internet means that it has the potential to converge with other digital technologies, which in turn will result in new services and applications becoming available.

      Packetized voice also enables much more efficient use of the network because bandwidth is only used when something is actually being transmitted. Also, the network can handle connections from many applications and many users at the same time, unlike the dedicated circuit-switch approach.
  • Cisco Voice over IP Exam Description
    • The 642-436 Cisco Voice over IP (CVOICE v6.0) is the exam associated with the CCNA Voice and CCNP Voice certification. This exam tests a candidate's knowledge of the foundational elements of VOIP calls, and the description of dial plans, and the implementation of gateways, gatekeepers and IP-IP gateways. Candidates can prepare for this exam by taking the CVOICE Cisco Voice over IP course.
  • Exam Topics
    • The following topics are general guidelines for the content likely to be included on the CVOICE v6.0 exam. However, other related topics may also appear on any specific delivery of the exam. In order to better reflect the contents of the exam and for clarity purposes, the guidelines below may change at any time without notice:
      • Describe the components of a gateway
        • Describe the function of gateways
        • Describe DSP functionality
        • Describe the different types of voice ports and their usage
        • Describe dial peer types
        • Describe codecs and codec complexity
      • Describe a dial plan
        • Describe a numbering plan
        • Describe digit manipulation
        • Describe path selection
        • Describe calling privileges
        • Describe call coverage
      • Describe the basic operation and components involved in a VoIP call
        • Describe VoIP call flow
        • Describe RTP, RTCP, cRTP, and sRTP
        • Describe H.323
        • Describe MGCP
        • Describe SCCP
        • Describe SIP
        • Identify the appropriate gateway signaling protocol for a given situation
        • Describe voice quality considerations
        • Choose the appropriate codec for a given situation.
      • Implement a gateway
        • Describe the gateway call routing process
        • Configure analog voice ports
        • Configure digital voice ports
        • Describe considerations for PBX integration
        • Configure dial-peers
        • Configure hunt groups and trunk groups
        • Configure digit manipulation
        • Configure calling privileges
        • Verify dial-plan implementation
        • Implement fax and modem support on a gateway
        • Configure a gateway to provide DTMF support.
      • Describe the function and interoperation of gatekeepers within an IP Communications network
        • S• Describe the function and types of gatekeepers
        • Describe the interoperation of devices with a gatekeeper
        • Describe gatekeeper signaling
        • Describe Dynamic Zone Prefix Registration with a gatekeeper
        • Describe gatekeeper redundancy.
      • Implement a gatekeeper
        • Configure devices to register with a gatekeeper
        • Configure gatekeeper to provide dial-plan resolution
        • Configure gatekeeper to provide call admission control
        • Verify gatekeeper operation.
      • Implement an IP-to-IP gateway
        • Describe the IP-to-IP gateway features and functionality
        • Configure gatekeeper to support an IP-to-IP gateway
        • Configure IP-to-IP gateway to provide address hiding
        • Configure IP-to-IP gateway to provide protocol and media interworking
        • Configure IP-to-IP gateway to provide call admission control
        • Verify IP-to-IP gateway implementations.
  • Recommended Training
    • Cisco Voice over IP (CVOICE v6.0) is the recommended training course for this exam.
  • Cisco Voice over IP (CVOICE) Course Prerequisites
    • Working knowledge of fundamental terms and concepts of computer networking to include LANs, WANs, and IP switching and routing.
    • Basic internetworking skills taught in Interconnecting Cisco Network Devices (ICND), or equivalent knowledge.
    • Ability to configure and operate Cisco routers and switches and to enable VLANs and DHCP.
    • Knowledge of traditional public switched telephone network (PSTN) operations and technologies.
  • Course Content
    • Cisco Voice over IP (CVOICE) v6.0 provides an understanding of converged voice and data networks and also the challenges faced by the various network technologies. The course also provides network administrators and network engineers with the knowledge and skills required to integrate gateways and gatekeepers into an enterprise VoIP network. This course is one of several courses in the Cisco CCVP track that addresses design, planning, and deployment practices and provides comprehensive hands-on experience in configuration and deployment of VoIP networks.
  • Course Objectives
    • After completing this course, the learner will be able to meet these overall objectives:
      • Describe VoIP, components of a VoIP network, VoIP protocols, special requirements for VoIP calls, and Codecs.
      • Configure gateway interconnections to support VoIP and PSTN calls.
      • Describe the basic signaling protocols used on voice gateways and configure a gateway to support calls using the various signaling protocols.
      • Define a dial plan, describing the purpose of each dial plan component, and implement a dial plan on a voice gateway.
      • Describe gatekeeper functions, protocols, and operation and implement an H.323 gatekeeper to provide dial plan resolution and call admission control.
      • Implement a Cisco Unified Border Element gateway to connect to an Internet Telephony Service Provider. :
  • Course Outline
    • Introducing Voice over IP
    • Configuring Voice Ports
    • Implementing VoIP Gateways
    • Implementing Dial Plans on Voice Gateways
    • Implementing H.323 Gatekeepers
    • Connecting to an ITSP
 

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