SIP Essentials

The Session Initiation Protocol / SIP has developed into one of the most important protocols for voice communication in the Internet world. This training gives a comprehensive insight into the SIP context and the necessary elements and other players. The training is suitable for system engineers who want to get a first and comprehensive overview. Project managers and engineers in pre-sales can use this knowledge to implement projects in the transformation of the TDM world to the IP world more quickly, since, for example, fundamental questions about existing customer networks are raised.
Each module can also be booked individually and supplemented with further components or more in-depth information and demonstrations.

Target Group

Engineers, technicians, installers and administrators


Basics of telecommunications and telephone systems, line switching, packet switching, IP knowledge is preferable.



If you want to participate remotely, please note the following technical requirements.

  • One telephone capable of hands-free or headset operation with mute capability. This will be used for Audio Conferencing.
  • One PCs or laptop for the web session and for documentation access.

Further information will be provided prior to the start of the course.

Key Features

Module 1

  • What is SIP?
  • SIP vs. VoIP 
  • Voice becomes an IP packet -Sampling and Codecs 
  • Why SIP? 
  • SIP and RFC"s 
  • The SIP system architecture and actors in the SIP network 
  • SIP Server and SIP Operations 
  • Basic components for configuring SIP clients 
  • The SIP messages in the overview of a call 
  • SIP and SDP 
  • SIP Mobility and SIP Routing 
  • MIME in SIP 
  • Selection of free / trial versions of desktop and mobile SIP clients

Module 2

  • Shark in sight! Wireshark. 
  • What is Wireshark? 
  • Why do we need Wireshark? 
  • How is Wireshark used? 
  • Wireshark and SIP Security 
  • Download and installation of Wireshark 
  • Menus and settings 
  • Profiles, Display Filter, Capture Filter 
  • Colour coding in the stream of a trace 
  • Follow a stream 
  • Testing, Troubleshooting and Interoperability

Module 3

  • SIP and the public network / SIP trunking 
  • SIP Trunking 
  • SIP and Early Media / Early and Delayed offer 
  • ISDN in SIP 
  • SIP and DTMF 
  • RTP - the Real Time Protocol 
  • SIP and Fax over IP 
  • Quality of Service - What is QoS, Delay, Packet loss, Diffserv & Co. 
  • Bandwidth and voice quality 
  • Effects of Unified Communication on QoS planning

Module 4

  • SIP and Media Security 
  • Authentication and Authorisation Encryption - Why? - Certificates and Encryption
  • Security in the Transport Layer and Signalling Securing the media stream 
  • Security in SIP Trunks 
  • Attacks on SIP/VoIP networks 
  • Caller Identification 
  • Stir/Shaken

Module 5

  • Network components for securing SIP/VoIP networks 
  • Firewalls, NAT and Session Border Controller 
  • SIP and the Cloud 
  • Differences between cloud structures 
  • Hosted SIP 
  • Everything as a Service 
  • Auto Provisiong in different solutions


Dates on request


5 Days


Dates on request


TOP Certification

Contact Person

Natalie Frisch

Tel: +49 911 40 905 303

Mobile: +49 163 8528013