|
1. VOIP Network Overview
- Reasons for converging voice and data networks
- Four ways to save on long distance costs
- VOIP for home use
- Business VOIP networks
- IP contact centers
- VOIP over the Internet
- VOIP over WiFi
- Important VOIP standards
2. Components of VOIP Networks
- Voice digitization: CODECs
- Packetizing voice samples
- Using silence suppression techniques
- Voice media gateways
- Signaling gateways
- Media server functions
- Carrier softswitches
- IP phones
- Firewalls and security
3. Session Initiation Protocol
- Duties and capabilities of SIP
- SIP architecture and coverage
- User agent logic
- Uniform Resource Indicators (URI)
- SIP address formats
- SIP message formats
- Use of Session Description Protocol (SDP)
- Proxy servers
- Updating location servers
- SIP commands and responses
- SIP call flow example
- Future uses of SIP
|
4. Real Time Protocol (RTP)
- Controlling the media stream
- RTP header fields
- Generating RTP packets
- Audio and video implementation
- Synchronizing media sources
- Real Time Control Protocol (RTCP)
- Translators and mixers
- Error concealment
- Congestion Control
- Header compression
- RTCP-XR
- Performance monitoring reports
- Security considerations
5. Performance Requirements
- Assessing voice quality
- Mean Opinion Score (MOS)
- Impairments: Latency, jitter and echo
- Impairments: lost and out of order packets
- Impairment solutions
- Voice quality testing methods
- Voice sample size selection
- Determining VOIP bandwidth requirements
- Methods to optimize voice quality
6. Carrier Services
- Carrier VOIP networks
- Media Gateway Control Protocol (MGCP)
- Session border controllers
- ENUM
- SIP trunking
- Voice over T1, DSL
- On-net/Off-net calling
- Remote access/extension
- FAX over IP
- VOIP toll-free calling service
- VOIP Service Level Agrrements (SLA)
- Dual mode phones: WiFi/cellular
- VOIP peering and federations
- IP Multimedia Subsystem (IMS)
|
