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SIP Analyzing & Troubleshooting Masterclass
New
Rating: 5.0 out of 5(1 rating)
7 students

SIP Analyzing & Troubleshooting Masterclass

Analyze SIP, RTP, TLS and Troubleshoot with Wireshark, SNGREP, TCPDUMP and Homer
New
Created byNenad Rajkovic
Last updated 5/2026
English

What you'll learn

  • By the end of this course, students will be able to:
  • Understand how Session Initiation Protocol works in a real VoIP environments
  • Analyze SIP call flows using Wireshark, SNGREP and Homer
  • Install and use TCPDUMP, SNGREP and Homer
  • Understand SIP dialogs, transactions, response codes and SDP
  • Analyze RTP streams and identify media-related issues
  • Identify NAT and SIP ALG related issues
  • Analyze jitter, packet loss and RTCP statistics
  • Understand SIP over TLS and secure signaling
  • Analyze TLS handshakes and certificates
  • Troubleshoot TLS and certificate-related failures
  • Understand SIP methods: INVITE, OPTIONS, REFER, REGISTER, SUBSCRIBE, NOTIFY and PRACK

Course content

6 sections • 23 lectures • 2h 0m total length

  • Introduction & Course Overview1:45

Requirements

  • Students should have:
  • Basic understanding of computer networking concepts
  • Basic familiarity with VoIP or SIP is helpful, but not required
  • A computer capable of running Wireshark
  • Willingness to learn through real-world troubleshooting scenarios and packet analysis
  • Optional but helpful:
  • Experience with IP phones, softphones or PBX systems
  • Basic understanding of TCP/IP networking
  • No advanced VoIP knowledge is required, the course starts with fundamentals and gradually moves into advanced troubleshooting scenarios.

Description

*** This course contains the use of artificial intelligence for creating a cover image and image in promo video ***

Modern VoIP environments are complex systems where signaling, media, networking, security and infrastructure all work together in real time. When problems occur, identifying the root cause often requires much more than theoretical SIP knowledge.

This course is designed to teach you how real-world VoIP troubleshooting works in production environments. This course will provide you a knowledge which tools to use to collect and analyze SIP captures and well as how to identify issues by analyzing logs.

In the SIP Analyzing & Troubleshooting Masterclass, you will learn how to analyze SIP communication, troubleshoot RTP and audio problems, understand TLS and secure SIP deployments, and develop a structured troubleshooting methodology used by VoIP engineers every day.

In this course we don't start with the question " What is SIP ? " but with the clear definitions what are SIP requests and responses, also defining the difference between SIP transactions and SIP dialogs.

The course combines theory, practical demonstrations and real packet analysis scenarios to help you understand not only how SIP works, but also how to identify and resolve real VoIP issues.

A major focus of this course is packet analysis and troubleshooting methodology.

You will learn how to:

  • Capture SIP traffic using tcpdump

  • Analyze SIP call flows using Wireshark

  • Troubleshoot SIP dialogs using SNGREP

  • Use Homer for SIP capture visualization and monitoring

  • Inspect RTP streams and identify media problems

  • Analyze TLS handshakes and encrypted SIP communication

  • Troubleshoot production VoIP issues systematically

  • Recognize SIP methods: INVITE, OPTIONS, REFER, REGISTER, SUBSCRIBE, NOTIFY and PRACK in logs

This is not a course focused only on theory, we are doing a lot of practical demonstrations

You will work through realistic troubleshooting scenarios and learn how VoIP engineers investigate problems in live environments.

You will learn how to capture, inspect and analyze SIP traffic in real-world scenarios.

Who this course is for:

  • VoIP engineers
  • Network engineers
  • System administrators
  • Technical support engineers
  • PBX administrators
  • Telecom professionals
  • IT students interested in VoIP technologies
  • Anyone who wants to learn practical SIP and RTP troubleshooting
  • If you want to move beyond theory and learn how real VoIP troubleshooting works in production environments, this course is for you.

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