Course Content
Course Topics
Introduction to Legacy Telephony:
- The Telephone Network
- Typical Analog Circuit
- DTMF - Dual Tone Multi-Frequency
- Call Progress Tones
- Digital Communication
- Analog Voice Signal Conversion to Digital Stages
- Pulse Code Modulation (PCM)
- Digital Signals Multiplexing
- Time Division Multiplexing (TDM)
- E1/T1
- Signaling Methods
- Integrated Services Digital Network – ISDN
- ISDN (Q.931) Call Flow Messages
- ISDN Basic Rate Interface (BRI)
Introduction to IP Telephony:
- What is VoIP
- Circuit vs. Packet Switching
- VoIP Architecture
- VoIP Protocol Stack
- What is RTP/RTCP
- Introduction to RTP
- Voice Codecs
- Voice Compression
- VoIP Challenges
- Voice Quality Measurement
- RTCP-XR
- Voice Quality Metrics
Introduction to SIP:
- SIP Network Entities
- SIP Terminology
- SIP Servers
- Basic SIP Call Flow
- SIP Requests: Basic Methods
- SIP Requests: Extended Methods
- SIP Responses
- SIP Addressing
- General Main Header Fields
- Session Description Protocol (SDP)
- Early Media
- Call Flow with Proxy
- SIP Servers – Registrar
- Registration Call Flow
- Number Once
- FXS/FXO Gateways
- Digital Gateway