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

Overview/Description
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.

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

Expected Duration (hours)
3.5

Lesson Objectives

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

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

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

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