SIP Essentials

Alta3 Research
Training overview
Professional Course
Self-paced Online, Webinar, On-site
5 days
From 295 USD
Start dates
295 USD
Start anytime

Private Team Training delivered Virtually

United States of America
Private Team Training delivered On-site or Virtually

Course description

SIP Essentials

In this SIP course, students learn Session Initiation Protocol and important protocols related to SIP implementations. This course thoroughly explains what SIP is, how it works, and also provides a practical guide on how to use it. The lessons in this course are clear and very technical. In this course, students will examine how SIP interoperates in the current telecommunications network, going beyond the basics of the protocol and getting a big picture understanding of how it all fits together. At the end of the course, students will receive access to an Alta3 Research SIP certification exam. Upon successful completion of the exam, students will be awarded a SIP certificate.

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Training content

Day 1 - SIP Architecture

Ch 1. VoIP Introduction

  • Circuit Switching
  • VoIP Protocols Overview
  • VoIP Deployments from the First Installations to Now
  • SIP and the Softswitch

Ch 2. SIP Architecture

  • The SIP Architecture
  • UA, Proxy, Redirect, Forking, B2BUA
  • Multimedia Architecture
  • SDP
  • SIP Responses
  • Via Path
  • Record-route

Day 2 - Understanding the SIP Dialog


  • Regular Expression
  • Building SIP Dialplans with REGEX

Ch 4. Routing the SIP INVITE

  • The Via: path
  • Creation of Response-Path
  • Response Merging
  • Record-route and Route:
  • Forking
  • Loops and Spirals

Ch 5. The SIP Dialog

  • The Purpose of the SIP Dialog
  • How to Begin and End a Dialog
  • The Dialog ID

Ch 6. SIP Entities

  • User Agents
  • Back-to-Back UAs
  • Proxy
  • Session Border Controller
  • Outbound Proxies

Day 3 - Advanced SIP Messaging

Ch 7. SIP Call Flows Examples

  • Normal call
  • Busy
  • Redirect
  • Transfer (REFER)

Ch 8. SIP Call Routing

  • How SIP Routing is Used to Route CALLS
  • Use of Record-Route in Stateless Routing Proxies
  • How SIP is Used in the PSTN Migration to An All IP Network

Ch 9. SIP Uniform Resource Indicators (URIs)

  • Generic URI Information (RFC 3986)
  • Direct or Proxy
  • PSTN Number (RFC 2808)
  • Instant Messaging
  • Presence
  • In Registrations

Ch 10. SIP Message Headers

  • SIP Dialog (To:, From:, tag= fields, Call-ID:)
  • Via: & Branch
  • Max-Forwards:
  • CSeq:
  • Proxy-Authenticate:
  • Proxy-Authorize:
  • Contact:
  • Expires:
  • User-Agent:
  • Content-Length:
  • Allow: Supported:
  • P-Access-Network-Info
  • P-Charging-Vector:
  • P-Preferred-Identity:
  • P-Asserted-Identity:
  • Authorization:
  • Security-Client:
  • Security-Server:
  • Content-Type:

Day 4 - Session Description Protocol, Real-time Transport Protocol, and Legacy Interop

Ch 11. Session Description Protocol (SDP)

  • Session Parameters
  • SDP Format
  • Extending SDP
  • SDPng
  • Media Negotiation
  • Changing Session Parameters
  • Controlling the Media

Ch 12. SIP and the DNS

  • Basic Resource Records (RR)
  • A-record, SOA, NS Record, MX Record (Important for Comparison to the SRV Record)
  • The SRV Record (RFC 2782)
  • How SIP Uses the SRV Record (RFC 3263 Locating SIP servers)
  • How to Configure a SRV Record
  • The NAPTR Record (RFC 2915)

Ch 13. ENUM

  • ENUM Protocol RFC 3761
  • Dynamic Delegation Discovery System (RFC 3401, 3402, 3403, 3761, 3764)
  • How SIP Uses ENUM

Ch 14. SIP and DHCP

  • DHCP Protocol
  • SIP DHCP Options

Ch 15. Interoperating SIP with Legacy STN Signaling

  • Call Transfer (REFER)
  • 183 Early Media
  • Interworking SIP with Local Call Control (E&M or DID)
  • SIP and the PSTN SIP-T

Ch 16. Real-time Transport Protocol (RTP) and Real-time Control Protocol (RTCP)

  • Dealing with Packet Loss, Latency & Jitter
  • How RTP Defines the Session
  • Session Description Protocol
  • The RTP Profile
  • The RTP Payload Type Field
  • RTP Telephony Events (RFC 2833)
  • How RTP Removes Jitter
  • How RTP Handles Packet Loss
  • How RTP Identifies the Talking Party
  • How RTP Handles Silence Suppression
  • How RTP Handles Fixed Length Packets (Padding)
  • How RTP is Used to Mix Voice (Conference Calls)
  • The RTP Header
  • RFC 2833 Protocol
  • RTP Control Protocol
  • SDES
  • Sender/Receiver Reports
  • Bye Reports

Day 5 - Applications of SIP and Troubleshooting

Ch 17. DTMF Handling

  • Inband
  • RFC 2833

Ch 18. Fax Handling

  • Inband
  • Fax Relay
  • T.38

Ch 19. Presence

  • SIMPLE: SIP for Instant Messaging and Presence Leveraging Extensions
  • Terminology
  • Framework
  • Resource List Manipulation Requirements
  • Authorization Policy Manipulation
  • Acceptance Policy Requirements
  • Notification Requirements
  • Content Requirements
  • General Requirements

Ch 20. SIP Timers

  • T1, T2, T4
  • Timer A-K

Ch 21. SIP Security

  • Security for Call Setup
  • Authentication
  • S/MIME
  • TLS

Ch 22. SIP NAT Traversal

  • How NAT operates on SIP and SDP
  • NAT Types
  • STUN
  • TURN
  • ICE

Ch 23. SIPp: A SIP Testing Tool

  • SIPp
  • SIPp XML Examples


  • Live Webinar fee: $2,495.00
  • E-Learning fee: $295.00
  • Contact the provider for more information about pricing for on-site delivery option

Certification / Credits

At the end of the course, students will receive access to an Alta3 Research SIP certification exam. Upon successful completion of the exam, students will be awarded a SIP certificate.

Why choose Alta3?

25+ years specializing in technology training 

Over 95% student satisfaction rate

Training delivered in 9+ countries

About Alta3

Alta3 Research

Since 1997, Alta3 Research has been empowering organizations and individuals using their expert approach to Cloud, DevOps and Telecom training. We develop and perform technical training via live classroom, online classes and our library of self-paced learning videos and labs....

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Average rating 5

Based on 8 reviews.

2020 Student
I had some reservations about the virtual learning environment. I am glad to say I found this experience, possibly because of Zach's pace, and teaching style actually more desirable to the in class learning style. Zach set the bar exceptionally high.
2020 Student
Thank you for your patience and your expert knowledge in explaining everything. I will definitely need to go back to the slide decks and videos for reviews as this is fairly new to some of us since our backgrounds are voice Legacies without too much DATA knowledge. Keep up the great work.
2020 Student
Zach went above and beyond my expectations of an instructor. He demonstrated a concrete understanding of the material and was able to pass that knowledge back to us in an entertaining and meaningful way. He was always eager to answer questions and genuinely cared about the quality of the class. Nothing but good things to say here.
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