Cisco CVOICE 8.0: Voice Port Implementation, Codecs, and DSPs

The target audience for this course is established IT professionals with a solid, existing background in Cisco and networking technologies.

Please contact us for information about prerequisites.

Expected Duration
210 minutes

Connecting voice devices to a network infrastructure requires an in-depth understanding of the signaling and characteristics that are specific to each type of interface. Digital trunks are used to connect to the public switched telephone network (PSTN), to a PBX, or to the WAN, and are widely available worldwide. This course maps out analog and digital interfaces; examines analog voice ports, analog signaling, and configuration parameters for analog voice ports; and explains how to implement and verify digital trunks.
The course also explains the compression schemes that you can use to transport voice using various coder-decoders (codecs), and the implications of these compression schemes on bandwidth usage. How to calculate the amount of bandwidth that a VoIP call will consume is also explained. Finally, the course discusses the digital signal processors (DSPs) that convert analog and digital voice signals into VoIP traffic.


Configuring Gateway Voice Ports

  • recognize how the various types of analog and digital voice port interfaces are used in enterprise scenarios
  • identify the characteristics of analog voice ports
  • recognize how to configure analog voice ports
  • recognize the features of T1 CAS
  • identify the features of ISDN
  • recognize how to configure T1 and E1 trunks to the PSTN
  • identify the steps in configuring ISDN PRI and BRI trunks
  • Verifying Gateway Voice Ports

  • identify how to fine-tune the analog and digital voice ports
  • identify how echo is generated in a telephone conversation and how the echo cancellation feature works
  • identify the commands used to verify analog and digital voice port configuration
  • configure voice ports
  • Understanding DSP Functionality, Codecs, and Codec Complexity

  • match the major voice codecs with their features
  • recognize how voice quality evaluation methods are applied with voice codecs
  • recognize how the packet rate and protocol overhead impacts the total per-call bandwidth
  • identify the functions of digital signal processors
  • distinguish between DSP modules
  • recognize the recommended codec choice in the various gateway deployment models
  • recognize how to configure a DSP for voice termination at a voice gateway
  • identify the commands used to verify DSPs




    Multi-license discounts available for Annual and Monthly subscriptions.