Cisco TVOICE 8.0: Troubleshooting Off-Net Calling Issues

This course is included in our On-demand training solution.

Overview

A call that is placed off site must go through a gateway. This gateway could be a Cisco Media Gateway Control Protocol (MGCP), H.323, or Session Initiation Protocol (SIP) gateway. This course discusses how to troubleshoot these different types of gateways and provides an understanding of the most common issues that are associated with placing a call off site.
During call processing, Cisco IOS voice gateways analyze digits and can perform digit manipulation. Understanding these functions and how a Cisco IOS voice gateway performs these tasks differently from Cisco Unified Communications Manager can help troubleshoot common Cisco IOS voice gateway issues.
Cisco Unified Communications Manager provides the dial plan for most devices in a Cisco Unified Communications system. This dial plan is often the most complex troubleshooting area of placing off-site calls in your Cisco Unified Communications system. This lesson reviews dial plans, including globalized call routing, and addresses the most common issues that can occur with these dial plans.
Other common voice issues that this course covers include troubleshooting missing or incorrect caller ID, ringback issues, one-way audio, dead air, dropped calls, and public switched telephone network (PSTN) setup failure.

Target Audience

Anyone wishing to obtain the Cisco Certified Network Professional CCNP Voice designation that validates the skills and knowledge required in order to create a voice solution that is transparent, scalable, and manageable. Established IT professionals with a working knowledge of converged voice and data networks, of MGCP, SIP, and H.323 as well as a working knowledge of their implementation on Cisco IOS gateways, and working knowledge of Cisco Unified Communications Manager, Cisco Unified Communications features and applications, and Cisco IOS voice gateways in single-site and multisite environments. Candidates who have completed the Cisco Certified Network Associate Voice (CCNA Voice) Certification which is obtained by completing the Introducing Cisco Voice and Unified Communications Administration 640-461 (ICOMM) v8.0 exam.

Prerequisites

Expected Duration

150 min.

Course Objectives

Troubleshooting MGCP, H.323, and SIP Gateways

  • describe how to troubleshoot MGCP, H.323, and SIP gateways
  • Gateway Digit Collection and Analysis

  • recognize how the Cisco IOS voice gateway performs inbound and outbound dial-peer matching
  • Issues with Discard Digits Instruction

  • recognize how incorrect discard digits instructions (DDIs) can cause calls to the Public Switched Telephone Network (PSTN) to fail
  • Dial Plan Issues

  • describe how to ensure that Cisco Unified Communications Manager is correctly set up with respect to route patterns, route groups, route lists, and CoS
  • describe how to ensure that the gateway is correctly set up with respect to route patterns, route groups, route lists, and CoS
  • Troubleshooting Common Voice Call Issues I

  • recognize caller ID and no-ringback scenarios and the voice issues that can occur in a Cisco Unified Communications system
  • Troubleshooting Common Voice Call Issues II

  • recognize one-way audio, dead air, dropped, and second dial tone issues that can occur in a Cisco Unified Communications system
  • PSTN Call Setup Failure

  • recognize the common reasons why you might experience call setup issues
  • recognize the ways to resolve call setup issues
  • Globalized Call-Routing Review

  • recognize the characteristics of globalized call-routing
  • Globalized Call-Routing Issues

  • list the most common issues that can occur while using globalized call-routing
  • Troubleshooting Globalized Calling Routing Issues

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