Cisco Voice over IP

The 642-436 CVOICE Cisco Voice over IP is the exam associated with the CCVP certification. This exam tests a candidate's knowledge of the foundational elements of VOIP calls, and the description of dial plans, and the implementation of gateways, gatekeepers and IP-IP gateways. Candidates can prepare for this exam by taking the CVOICE Cisco Voice over IP course.

The following topics are 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. In order to better reflect the contents of the exam and for clarity purposes, the guidelines below may change at any time without notice.

Describe the components of a gateway

• Describe the function of gateways
• Describe DSP functionality
• Describe the different types of voice ports and their usage
• Describe dial peer types
• Describe codecs and codec complexity

Describe a dial plan

• Describe a numbering plan
• Describe digit manipulation
• Describe path selection
• Describe calling privileges
• Describe call coverage

Describe the basic operation and components involved in a VoIP call

• Describe VoIP call flow
• Describe RTP, RTCP, cRTP, and sRTP
• Describe H.323
• Describe MGCP
• Describe SCCP
• Describe SIP
• Identify the appropriate gateway signaling protocol for a given situation
• Describe voice quality considerations
• Choose the appropriate codec for a given situation

Implement a gateway

• Describe the gateway call routing process
• Configure analog voice ports
• Configure digital voice ports
• Describe considerations for PBX integration
• Configure dial-peers
• Configure hunt groups and trunk groups
• Configure digit manipulation
• Configure calling privileges
• Verify dial-plan implementation
• Implement fax and modem support on a gateway
• Configure a gateway to provide DTMF support

Describe the function and interoperation of gatekeepers within an IP Communications network

• Describe the function and types of gatekeepers
• Describe the interoperation of devices with a gatekeeper
• Describe gatekeeper signaling
• Describe Dynamic Zone Prefix Registration with a gatekeeper
• Describe gatekeeper redundancy

Implement a gatekeeper

• Configure devices to register with a gatekeeper
• Configure gatekeeper to provide dial-plan resolution
• Configure gatekeeper to provide call admission control
• Verify gatekeeper operation

Implement an IP-to-IP gateway

• Describe the IP-to-IP gateway features and functionality
• Configure gatekeeper to support an IP-to-IP gateway
• Configure IP-to-IP gateway to provide address hiding
• Configure IP-to-IP gateway to provide protocol and media interworking
• Configure IP-to-IP gateway to provide call admission control
• Verify IP-to-IP gateway implementations

Cisco Voice over IP (CVOICE v6.0) is the recommended training for this exam.

Courses listed are offered by Cisco Learning Partners—the only authorized source for Cisco IT training delivered exclusively by Certified Cisco Instructors. Check the Global Learning Partner Locator for a Cisco Learning Partner near you.

A variety of Cisco Press Self-Study titles are available for this exam. These titles can be purchased at the Cisco Marketplace, directly from Cisco Press, or wherever you purchase technical books.

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