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Module 1: Introduction to VoIP
Lesson 1: Introducing VoIP Network Technologies
- Business CASE for VoIP
- VoIP Functions
- Components of a VoIP Network
- VoIP Signaling Protocols
- VoIP Service Considerations
- RTP and RTCP
Lesson 2: Introducing VoIP Network Architectures
- Centralized Network Architectures
- Distributed Network Architectures Using H.323
- Distributed Network Architectures Using SIP
- Comparing Network Architectures
- Interconnecting VoIP Protocols
- Understanding Gateways
- Guidelines for Selecting the Correct Gateway
- Enterprise Central and Remote Site Gateway Interconnection Requirements
- Service Provider Gateway Interconnection Requirements
Lesson 3: Building Scalable Dial Plans
- Numbering and Dial Plans
- Internal Numbering and Public Numbering Plan Integration
- Scalable Dial Plans
- Practice Item 1: Span Engineering Dial Plan Worksheet
- Scalable Dial Plan Attributes
- Enhancing and Extending an Existing Numbering Plan to Accommodate VoIP
- Accounting for Caller Mobility for 911 Services
- Practice Item 2: Numbering Plan for Span Engineering
- Chicago Airport Location
- London Location
Lesson 4: Calculating Bandwidth Requirements
- Codec Bandwidths
- Impact of Voice Samples and Packet Size on Bandwidth
- Data-Link Overhead
- Security and Tunneling Overhead
- Calculating the Total Bandwidth for a VoIP Call
- Effects of VAD on Bandwidth
- Practice Item: Span Engineering Voice Bandwidth Requirement
Lesson 5: Allocating Bandwidth for Voice and Data Traffic
- Sources of Traffic Statistics
- Network Objectives for Voice and Data
- Meeting the Current Network Objective
- Traffic Theory
- Busy Hour
- Erlangs
- Traffic Probability Assumptions
- Traffic Calculations
- Call Density Matrix
- Bandwidth Calculations
- Determining IP Bandwidth
- Practice Item: Bandwidth Calculation
Lesson 6: Considering Security Implications of VoIP Networks
- Security Policies for VoIP Networks
- Threats to VoIP
- Secure LAN Design
- Communicating Through a Firewall
- Delivering VoIP over a VPN
- International Issues
- Bandwidth Overhead Associated with a VPN
- Practice Item: Span Engineering VoIP Network Security Components
Module 2: Configuring Voice Networks
Lesson 1: Configuring Router Voice Ports
- Voice Port Applications
- FXS Ports
- FXO Ports
- E&M Ports
- Timers and Timing
- Digital Voice Ports
- ISDN
- CCS Options
- Monitoring and Troubleshooting
Lesson 2: Adjusting Voice Interface Settings
- Factors Affecting Voice Quality
- Setting Input and Output Power Levels
- Baselining Input and Output Power Levels
- Voice Quality Tuning
- Configuration Parameters
- Echo Cancellation Commands
Lesson 3: Configuring Dial Peers
- Dial Peers and Call Legs
- End-to-End Calls
- Types of Dial Peers
- Configuring POTS Dial Peers
- Practice Item 1: POTS Dial-Peer Configuration
- Configuring VoIP Dial Peers
- Practice Item 2: VoIP Dial-Peer Configuration
- Configuring Destination-Pattern Options
- Default Dial Peer
- Matching Inbound Dial Peers
- Practice Item 3: Matching Inbound Dial Peers
- Matching Outbound Dial Peers
- Configuring Hunt Groups
- Practice Item 4: Configuring Hunt Groups
- Digit Collection and Consumption
- Configuring Digit Manipulation
- Practice Item 5: Digit Manipulation
Lesson 4: Configuring Voice Port Network Connections
- Connection Types
- Using the connection Command
- Configuring PLAR Connections
- Configuring PLAR OPX Connections
- Configuring Trunk Connections
- Configuring Tie-Line Connection
Module 3: VoIP Signaling and Call Control
Lesson 1: Introducing Signaling and Call Control
- VoIP Signaling
- Call Control Models
- Translation Between Signaling and Call Control Models
- Call Setup
- Call Administration and Accounting
- Call Status and CDRs
- Address Management
- Admission Control
Lesson 2: Introducing H.323
- H.323 and IP
- Functional Components of H.323
- H.323 Gateways
- IP-to-IP Gateways
- H.323 Gatekeepers
- Multipoint Conferences
- H.323 Call Establishment and Maintenance
- RAS Messages
- Call Flows Without a Gatekeeper
- H.323 Fast Connect Call Setup
- Call Flows with a Gatekeeper
- Call Setup with a Gatekeeper
- Gatekeeper-Routed Call Signaling
- Call Flows with Multiple Gatekeepers
- Call Setup with Multiple Gatekeepers
- Multipoint Conferences
Lesson 3: Deploying and Configuring H.323
- Robust Design
- H.323 Proxy Server
- Cisco Implementation of H.323
- Configuring H.323 Gateways
- Configuring H.323 Gatekeepers
- Monitoring and Troubleshooting
- Selected debug Commands
Lesson 4: Configuring SIP
- Session Initiation Protocol
- Components of SIP
- SIP Messages
- Status Codes
- SIP Addressing
- Call Setup Models
- Robust Design
- Cisco Implementation of SIP
- Configuring SIP on a Cisco Router
- Monitoring and Troubleshooting
Lesson 5: Configuring MGCP
- MGCP and Its Associated Standards
- Basic MGCP Components
- MGCP Endpoints
- MGCP Gateways
- MGCP Call Agents
- Basic MGCP Concepts
- MGCP Calls and Connections
- MGCP Control Messages
- Call Flows
- Robust Design
- Cisco Implementation of MGCP
- Configuring MGCP
- Monitoring and Troubleshooting
Lesson 6: Comparing Call Control Models
- Feature Comparison Charts
- Standards Bodies (ITU-T vs. IETF)
- Architecture (Centralized vs. Distributed)
- Current Version
- Signaling Transport (TCP vs. UDP)
- Multimedia Capability (Yes or No)
- Call Control Encoding (ASN.1 vs. Text)
- Supplementary Services (Endpoint vs. Call Control)
- Strengths of H.323, SIP, and MGCP
- H.323
- Session Initiation Protocol
- Media Gateway Control Protocol
- Selecting Appropriate Call Control
- MGCP Call Control Model
- The H.323 Call Control Model
- SIP Call Control Model
Module 4: Improving and Maintaining Voice Quality
Lesson 1: Designing for Optimal Voice Quality
- IP Networking Overview
- Jitter
- Delay
- Acceptable Delay
- Packet Loss
- PESQ, MOS, and PSQM
- Mean Opinion Score
- Perceptual Speech Quality Measurement
- Perceptual Evaluation of Speech Quality
- Quality Measurement Comparison
- Objectives of QoS
- Using QoS to Improve Voice Quality
- Recognizing Common Design Faults
- Cisco AutoQoS Features
Lesson 2: Implementing CAC
- Effects of Oversubscribing Bandwidth
- CAC Operation
- Resource Reservation Protocol
- CAC Tools
- H.323 CAC
- SIP CAC
- Configuring SAA RTR Responder
- Configuring PSTN Fallback
- Configuring Resource Availability Check
- MGCP CAC
- Configuring SRC CAC
- Configuring RSVP CAC
- Configuring Cisco SAA CAC
- Cisco CallManager CAC
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