Course Description

Course Objectives

Intended Audience

Course Prerequisites

Course Outline

Course Labs

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Course Description

This advanced Authorized Cisco course covers the in-depth and important topics needed to implement Cisco Voice Gateways and Gatekeepers in Enterprise or Service Provider environments with CallManager and Cisco Unity. Learn to install, configure, monitor, and troubleshoot Cisco voice gateways and gatekeepers in Enterprise installations in accord with the recommendations of Cisco's Solution Reference Network Design (SRND) for IP Telephony guides. Given a Voice over IP (VoIP) design, you will select an appropriate deployment model, correctly configure the gateways and gatekeepers (whether distributed or centralized), implement call plans, and decide how to implement the most commonly offered Service Provider or managed services applications, features, or implementation requirements.

Course Objectives

What you will learn:

• A systematic methodology to troubleshoot Cisco Unified Communication systems by using knowledge of tools and reports that help isolate Cisco Unified Communication system problems
• When given a trouble call that has been categorized as a Cisco Unified CallManager-related issue, isolate the specific problem, propose a solution, and, where appropriate, implement the solution
• Diagnose and resolve a call setup issue
• Troubleshoot the quality of both voice and video streams
• Given a trouble call that has been isolated to a Cisco Unified Communications system component application, isolate the specific problem, propose a solution, and, where appropriate, implement the solution

Intended Audience

Network engineers responsible for implementing Cisco Voice Gateways and Gatekeepers in an Enterprise or Service Provider environment. Also, this course is a must for technical professionals pursuing CCVP certification.

Course Prerequisites

Before attending this boot camp, students should have completed the following prerequisites:

• CCNA
• CIPT 1 and 2
• QoS
• CVoice

Course Outline

Learn the function of gateways and gatekeepers in a VoIP environment that includes H.323, MGCP, and SIP protocols

• Introducing Gateways and Gatekeepers - Given either a single, centralized, multi, or distributed deployment model, compare and contrast the role and functionality of gateways and gatekeepers.
• Implementing an H.323 Gateway - Given deployment requirements including various features, devices, and traffic considerations, implement an H.323 gateway.
• Implementing an MGCP Gateway - Given deployment requirements including various features, devices, and traffic considerations, implement an MGCP gateway.
• Implementing SIP Gateways - Given deployment requirements including various features, devices, and traffic considerations, implement a SIP Trunk between another CallManager or Cisco SIP Proxy Server.

Identify the requirements for integrating a VoIP network with the PSTN and PBXs using voice gateways.

• Connecting to the PSTN and PBXs - Discover the activities required when integrating PSTN and PBX to gateways.
• Analog Circuits - Given deployment requirements, integrate a voice gateway to the PSTN or a PBX using analog circuits.
• CAS Circuits - Given deployment requirements, integrate a voice gateway to the PSTN or a PBX using CAS circuits.
• PRI Circuits - Given deployment requirements, integrate a voice gateway to the PSTN or a PBX using PRI circuits.
• QSIG Integration - Given deployment requirements, integrate a voice gateway to the PSTN or a PBX using QSIG.
• PBX Integration Case Study - Given deployment requirements, discuss the various options for integrating a VoIP network to a PBX.

Learn to implement a dial plan on a Cisco gateway including dial and number plans and COR applications.

• Dial Plan Overview - Given a VoIP network, design an effective scaleable numbering and dial plan for H.323, MGCP, and SIP gateways.
• Digit Manipulation - Given a network topology, improve call flow by designing and using translation rules and translation profiles to manipulate digits on a gateway using CLI.
• Class of Restriction - Given several incoming and outgoing dial-peer scenarios, identify where in the gateway COR is applied, and describe the configuration and verifications steps.
• Influencing Call Routes - Given a network topology, influence call routes to provide redundancy and cost efficiency.

Given a set of requirements for advanced services, configure a voice gateway to enable the required services.

• Deploying Survival Remote Site Telephony (SRST) - Given redundancy requirements for a Centralized Call Processing model, configure SRST on a remote site gateway to support the requirements.
• Digital Signal Processors in Voice Gateways - Given deployment requirements including transcoding and conferencing, configure DSP Farms on a gateway.
• Tool Command Language (Tcl) - Given deployment requirements including basic Auto Attendant functions, configure Tcl applications to support the requirements.

Given a set of deployment requirements including number resolution and Call Admission Control, implement a gatekeeper to meet the requirements.

• Gatekeeper Overview - Learn the features and functions of a gatekeeper.

Implementing Gatekeepers - Given a set of deployment requirements including single and multizone, configure a gatekeeper to provide number resolution and CAC for H.323 gateways and CallManager.

• Directory Gatekeeper - Given a set of deployment requirements, configure a directory gatekeeper.
• Implementing Gatekeeper Redundancy - Given a set of deployment requirements including high availability, configure gatekeeper redundancy.

Describe common Service Provider offerings such as Wholesale voice and IP Centrex, and describe how IP-IP gateway supports these offerings.

• Understanding Service Provider Offerings - Explore the common types of Service Provider offerings to consumers and Enterprise customers.
• IP-IP Gateway - Learn the requirements of deploying IP-IP gateways in a Service Provider environment.

Course Labs

Wire the GWGK classroom network and image the CallManager Publisher and Subscriber servers for each cluster. CallManager configurations are mostly preprogrammed so you can focus on gateway configuration. Become familiar with extension mobility test profiles, and configure DHCP on the BrA router. This lab takes less than 90 minutes and no additional wiring is required for any later labs.

Partitions for "New Style" Class of Service

This optional discovery lab explores the CallManager dial plan configuration. A comprehensive dial plan is preconfigured including 911, 3-digit service codes, 7- and 10-digit local dialing, and long distance and international dialing. Class of Service supporting geographic routing is preconfigured in the CallManager cluster using "new style" blocking CSSs deployed on lines. This is an optional "inspection only" lab that you may run in full or in part at any time during the course.

Full dial plan preconfigured, full CoS using "New Style Approach"

Deploy MGCP on the Headquarters router, which has a PRI, 2 FXS ports, 2 FXO ports, and a T1-CAS connection to a channel bank connected to 2 PBXs. Test dialing to all patterns and to phones attached to the 2 PBXs. Investigate using the ccm-manager config commands to download the router's MGCP configuration using TFTP and manually configure the router.

In this lab, tackle the first step in a comprehensive H.323 Branch site deployment. Configure dial peers allowing calls coming in from the PSTN via PRI or FXO ports and calls coming in from attached PBXs and FXS ports to be routed to internal numbers.

A comprehensive dial plan is preconfigured in each CallManager cluster, including Class of Service using the "new style" blocking partitions and calling search spaces. Investigate this dial plan, and test calling out to the PSTN through the HQ gateway previously configured for MGCP in Lab 3. Depending upon the instructor and class, you may do Lab 2 or Lab 6 or skip both labs.

Configure dial peers on the Branch A H.323 gateway allowing calling from the attached PBXs and FXS ports to be routed to external numbers. Deploy and test a complete dial plan allowing calls to 911, service codes, local 7- and 10-digit numbers, as well as long distance and international numbers. COR is deployed to provide Class of Service. This configuration is the basis for SRST operation in the advent of loss of connectivity to HQ.

Full COR configuration including 911

Building on Lab 6, add dial peers to the Branch A H.323 gateway so calls from IP phones at Branch A will route out the Branch A PRI. Calls from the Branch A attached PBXs and FXS ports will also be able to call external numbers, but the CallManager will now be involved in the signaling to capture CDR records and provide Class of Service.

Multiple DS0-Groups for T1-CAS, full dial plan including 911, complete simulation for multiple FXO ports, Caller ID testing for FXS ports

Investigate tail-end hop-off configuration for H.323 and use RSVP to provide CAC and QoS for these calls.

Configure and test SRST at both the HQ (MGCP) and Branch A (H.323) sites. Deploy and test a complete backup strategy including preservation of Class of Service using COR on the gateway when the CallManager is unavailable. You will investigate new call survivability capabilities for H.323 gateways for server and WAN failure scenarios.

PDVM2-32 DSP resources are available at both HQ and Branch A sites. Configure Conference and Transcoding resources at these sites. Investigate and configure Media Resource Groups and Media Resource Group Lists. Use Microsoft Performance Monitor to validate correct operation of Conference Bridges at BrA and HQ sites as well as the use of Transcoding resources.

Using Performance Monitor to track resource usage

Configure and test an autoattendant TCL script on the Branch A gateway.

Use SIP trunks to interconnect the CallManager clusters deployed in the lab network.

Use SIP trunks to interconnect the Branch A gateways to the HQ CallManager clusters.

Deploy fully meshed gatekeepers to connect the multiple CCM clusters. Ours is the only lab that lets you explore multi-cluster connectivity using gatekeepers. You'll also investigate gatekeeper CAC.

In the second gatekeeper lab, deploy gatekeeper clusters and fault-tolerant directory gatekeepers to mesh the gatekeeper clusters deployed on your own routers.

In this challenge lab, expand the configuration of Lab 15 to include routing to the PSTN via the Branch A H.323 gateways providing access to a toll bypass network for the attached PBXs. Ours is the only lab that lets you explore connectivity between multiple H.323 gateways with attached PBXs and PRI access to the PSTN supported by gatekeeper clusters and redundant directory gatekeepers.

IP-to-IP gateways are used to manage the flow of RTP streams between clusters.

Lab 18: Branch Promotion to CME: Comprehensive Gatekeeper Lab

In this lab, you will promote your BrA router to run CME , and you will construct a comprehensive gatekeeper topology. The BrA router behaves both as a router allowing attached PBXs to access the toll bypass network and as a CME router allowing IP Phones to connect to the same network, including CallManager clusters. Ours is the only lab that lets you explore connectivity between multiple CallManager clusters and CallManager Express deployments supported by gatekeeper clusters and redundant directory gatekeepers.

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