Cisco TVOICE 8.0: Troubleshooting Call Setup Issues

Overview/Description
When a call is setup in a Cisco Unified Communications system, configuration errors can cause problems in many areas. Some of these areas include router configurations, Cisco Unified Communications Manager configurations, Quality of Service (QoS) settings, ISDN settings, and carrier issues. This course provides an overview of some of the issues that can arise with call setup in a Cisco Unified Communications system. If you experience a problem when making a call between two devices within the same cluster, at the same site, the two most likely causes of the problem are Class of Service (CoS) settings or translation patterns. CoS in Cisco Unified Communications Manager takes the form of partitions and Calling Search Spaces (CSSs). Issues with CoS can manifest in several ways: one-way calling, forwarding issues, and call setup problems. To understand and troubleshoot these problems, you need to know how Cisco Unified Communications Manager collects and analyzes digits. The issues that are commonly encountered can be with the Intercluster Trunks (ICTs), overlapping dial plans, and issues with calls between clusters. These issues collectively are all a part of the overall Cisco Unified Communications Manager dial plan. This course discusses three out of four possible troubleshooting areas in which you may have call setup issues. The course looks at troubleshooting on-premises single-site calls, on-net multisite calls including intercluster calls. The course also discusses the different topology attributes for completing a call and the different tools and commands both on gateways and on the Cisco Unified Communications Manager.

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.

Expected Duration (hours)
2.0

Lesson Objectives

Cisco TVOICE 8.0: Troubleshooting Call Setup Issues

describe commonly experienced call setup issues

describe typical reasons for call setup to fail for on-premises calls

recognize how Cisco Unified Communications Manager collects and analyzes digits

describe how a Cisco Unified Communications Manager uses partitions and CSSs to manage calls

troubleshoot a centralized multisite deployment calling issue

describe how to troubleshoot common causes of single-site call setup failures

describe the call setup issues that are common to multisite deployments

describe the call setup issues related to an overlapping dial plan and identify how to solve these issues

recognize the issues that can occur when call setup to another cluster is failing

recognize common gatekeeper issues

describe how to troubleshoot gatekeeper discovery, registration, call routing, and CAC in a given scenario