Vendor:	Cisco
Exam :	642-452
Title :	Gateway Gatekeeper
Certification :	CCVP
No of Questions :	156 Q & A with Explanation
Updated :	12/05/2013

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642-452 GWGK
Gateway Gatekeeper Exam

Associated Certifications: CCVP

Exam Description
The Gateway Gatekeeper exam assesses the knowledge of the Systems Engineer on the implementation of Cisco gateways and gatekeepers to integrate a VoIP network to both PSTN and TDM equipment. This includes implementing dial plans and advanced gateway features such as SRST and DSP resources. The exam also covers implementing gatekeepers and directory gatekeepers to provide hierarchical dial plan resolution and call admission control.

Exam Topics
Explain the function and interoperation of Gateways within a converged network
* Compare and contrast the different protocols used on the Gateways, and the appropriate application of each protocol
* Explain the differences between the various Digital and Analog line protocols
* Describe and explain QSIG and its implementation
* Describe and explain drop and insert multiplexing features

Configure and implement DSP resources to support specified requirements
* Explain the capabilities and functions of a DSP resources
* Configure a DSP resources to support transcoding
* Configure a DSP resources to support conferencing

Explain the function and interoperation of Gatekeepers within a converged network
* Explain the function of Gatekeepers
* Explain the interoperation of a Gatekeeper and the call agent
* Describe and explain the Gatekeeper transaction message protocol and it's usages

Determine the relevant technical and business needs that effect the choice of Gateway features, protocols and placement
* Select the correct placement of the Gateway within a given network topology to meet stated requirements
* Given different Telco and PBX system offerings, determine which Gateway services can be supported
* Select the correct protocol to support the required features (Fax relay, modem relay, pass-though, survivability, caller-ID, caller name display)

Determine the relevant technical and business needs that effect the choice of Gatekeeper features and placement
* Select the correct placement of the Gatekeeper within a given network topology to meet stated requirements
* Select the appropriate Gatekeeper functionality given stated business and technical requirements. (call admission control, dial-plan resolution)

Configure and implement a Gateway to interface with the PSTN
* Configure PRI connectivity (switch type, signaling)
* Configure BRI connectivity (switch type, signaling)
* Configure CAS connectivity ( feature group B and D, E1 R2)
* Configure Analog connectivity (loop and ground start, FXO, DID, FXS)
* Configure drop-and-insert feature
* Verify and troubleshoot configurations

Configure and implement a Gateway to interface with a PBX and voice mail system
* Configure analog connectivity (FXO, FXS, E&M types 1-4)
* Configure PRI connectivity (switch type, Qsig, signaling)
* Configure BRI connectivity (switch type, signaling)
* Configure CAS connectivity ( feature group B and D, E1 R2)
* Configure additional voicemail connectivity features (DTMF 4th column, etc)
* Configure IP circuit emulation feature
* Verify and troubleshoot configurations

Design and deploy a dial-plan to meet specific requirements
* Configure digit manipulation. (translation rules, number expansion)
* Design call routing scheme to meet technical and business requirements
* Configure alternate call routing. Based on resource availability or cost
* Implement and configure COR to meet business requirements
* Configure Gateway to use Gatekeeper for call resolution
* Configure call agent to use Gatekeeper for call resolution
* Verify and troubleshoot configurations

Implement extended services on the Gateway including Auto Attendant and Accounting/Billing
* Download TCL scripts
* Configure Auto Attendant using TCL scripts
* Describe TCL usages (Billing, Radius, AAA)

Design and deploy redundant Gateway configurations to provide high availability
* Implement SRST on the Gateway
* Describe necessary phy

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