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642-425 IPTT
IP Telephony Troubleshooting Exam

Exam Number: 642-425
Associated Certifications: CCVP, and IP Telephony Operations Specialist

Exam Description
The Cisco IP Telephony Troubleshooting exam will certify that the successful candidate has important knowledge and skills necessary to troubleshoot Enterprise CallManager, Unity, and IP network deployments. The IP Telephony Troubleshooting exam is one of two exams in a curriculum that addresses both design/planning practices and hands-on experience in configuring, deploying, and troubleshooting AVVID solutions.

Exam Topics
The following information provides general guidelines for the content likely to be included on the exam. However, other related topics may also appear on any specific delivery of the exam.

Describe effective troubleshooting methods to resolve issues in complex IP Telephony networks
* Identify general converged network problems and issues
* Perform a baseline analysis and document existing infrastructure using Cisco recommended methodologies
* Create a troubleshooting strategy that follows Cisco recommended methodologies
* Use Cisco TAC as a troubleshooting and escalation tool

Troubleshoot common CallManager configuration, integration and operations problems
* Troubleshoot common call setup problems with both voice and video calls
* Troubleshoot complex CallManager problems using system trace files
* Troubleshoot and resolve Cisco CallManager dial-plan issues including CSS, Partitions, and translation patterns
* Troubleshoot and resolve problems with media resources including MOH and conferencing
* Identify CTI components and troubleshoot problems related to CTI

Troubleshoot Cisco AVVID and server components using the appropriate utilities and management tools
* Demonstrate the use of the Cisco CallManager Serviceability tools to troubleshoot IPT problems

Troubleshoot common router, switch and gateway configuration, integration and operation issues and problems
* Determine the effect of Layer 2 configuration errors on an IPT network operation
* Determine the effect of Layer 3 configuration errors on an IPT network operation
* Troubleshoot and resolve problems with Gateway operation

Use appropriate troubleshooting methods to determine and solve QoS issues in complex IP Telephony networks
* Determine the QoS policies in effect in an established network
* Describe the various QoS methods available and their effect on network traffic flows
* Identify common problems associated with voice echo

Troubleshoot common Unity configuration, integration and operation issues and problems
* Troubleshoot and resolve message delivery problems
* Describe disaster recovery tools
* Troubleshoot and resolve MWI problems
* Troubleshoot and resolve Voice Mail port problems

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