Course Introcution
  • About the Instructor
  • What will you Get Out of This Course
Introduction to Telecommunications
  • A Brief History of Telecom
  • A New Challenger Approaches: SIP
SIP Signalling Messages
  • SIP Signaling
  • SIP 100 Messages
  • SIP 200 Messages
  • SIP 300 Messages
  • SIP 400 Messages
  • SIP 500 Messages
  • SIP 600 Messages
SIP Media
  • SIP Media
  • Understanding SDP
How to Speak SIP
  • The Back to Back User Agent & Ladder Diagrams
  • Wireshark 101
  • Contents of SIP Packets
SIP Tracing 101 - Practice Examples
  • Installing FreePBX in VirtualBox
  • Configuring FreePBX Extensions
  • Setting up Zoiper Soft-Phone
  • Tracing a Real Phone Call and Reviewing Wireshark
Troubleshooting Tips & War Stories
  • Welcome to the Troubleshooting Section
  • My Troubleshooting Process
  • Phone Calls with Noise
  • Setting up SIP Trunks with Providers
  • Why I Hate Sangoma
  • Troubleshooting No Ringback
  • Troubleshooting Bad Call Quality
Closing Thoughts & Additional Information
  • The SIP RFCs
  • Contact Information