Course Duration


Course Objectives

In today's market, most networks are comprised of a variety of combinations of telephony switches and hardware. VOIP and Softswitches are such elements that made an evolution in the telecommunication industry by providing management of voice, fax, data and video traffic, and call routing through same communication channel. At the same time due to the evolution of Mobile network generations and increasingly uses of OTT services, it become vital for telecom companies to use of VoLTE and VoWiFi to compete in the industry.

Telecontran’s 3-day Workshop on VoIP / SIP Towards VoLTE / VoWiFi is designed to provide a comprehensive analysis on VoIP concepts, supporting architectures, interworking with circuit-switched networks together with QoS issues as well as how IMS based 3GPP voice service is realized in LTE/EPS VoLTE Network and WiFi Access Network.

After successful completion of this 3 day workshop, participants will be able to

  • Get a solid understanding of VOIP, VOIP services and Carrier Networks
  • Understand Real time routing Protocols for VoIP delivery along with H.323 and SIP / SDP analysis
  • Gain knowledge on SIP, SIP Protocol as well as RTP, CRTP, SRTP & RTCP
  • Learn the detail on how the VoLTE and often associated VoWiFI network operates.
  • Explain the procedures for registration and VoLTE / VoWiFi call setup as well as Mobility scenarios between WiFi and E-UTRAN Accesses.

Target Audience

This course is aimed to Communications and IT professionals, engineers, software developers, technical support personnel and field engineers and anyone needing in-depth knowledge of the VOIP/ SBC, SIP, VoLTE and VoWiFi concepts.

Course Curriculum

Module 1: Introduction to Voice over IP (VOIP)
  • VoIP Overview
  • IP Telephony Network Architectures
  • VoIP Benefits
  • Circuit Switching vs. Packet Switching
  • VoIP Access
  • VoIP Infrastructures and Its Subsystem
  • VoIP Implementation
  • Internet Telephony Product Classes - Carrier Class and Enterprise Class
  • Single Clients
  • Internet Telephony
  • IPT Class 1 / IPT Class 2 / IPT Class 3
  • VoIP Regulatory Bodies
Module 2: Voice quality, quality measurements and quality reports
  • VoIP Quality
  • Echo
  • Network Delay
  • Packet Jitter
  • Quality Measures
  • Codecs
  • Delivering QOS with VoIP
  • VoIP Security – ENUM, NAT/NAPT, STUN, TURN
Module 3: Session Initiation Protocol (SIP)
  • SIP Components
  • SIP servers (proxy, registrar, redirect, location)
  • SIP Addressing - the URI
  • Signaling when the phone rings
  • Capabilities exchange
  • Closing calls
  • SIP Message Format
  • SIP Registration Services
  • Security in SIP exchanges
  • SIP Detail Call Flows
Module 4: Session Description Protocol (SDP)
  • SDP main tasks
  • SDP Messages
  • Mandatory and optional fields

Course Curriculum

Module 5: SBC and Lawful Interception
  • Stateful and stateless session controller
  • Potential threats and solutions
  • NAT traversal
  • Lawful interception
Module 6: NGN Introduction
  • NGN History
  • NGN Advantages
  • NGN Services (traditional IN services, IP Centrex, Color ring and so on)
  • Multimedia services (P2P Video for instance)
Module 7: The Rush towards VoLTE and VoWiFi
  • Market Trends
  • Why VoLTE and VoWiFi
  • Problems and Challenges in using VoLTE and VoWiFi
Module 8: VoLTE Architecture
  • VoLTE Basic Architectural Requirement
  • LTE Access Network
  • IMS Call Control Network
  • Key Nodes: CSCF, HSS, ATCF, ATGw, SCC AS, TAS
  • PCC Architecture

Course Curriculum

Module 9: VoLTE Registration and Call Procedures
  • IMS Identities
  • IMS Registration Analysis
  • Receipt of the Initial Registration (S-CSCF)
  • IMS Registration Security
  • Reregistration and Subscriber Profile Acquisition
  • VoLTE Media - Codecs and RTP Transport
  • High Level SIP Signalling Flow
  • VoLTE to VoLTE Call Establishment.
  • Delivering the SDP Offer / SDP Answer
  • VoLTE Call Termination
Module 10: VoLTE Featured Services
  • VoLTE Supplementary Services
  • Additional IMS Functions
  • IMS Messaging Services
  • Supporting Legacy Voice Through the Migration to VoLTE
  • Emergency Services
  • ICS and SRVCC
Module 11: VoWiFi Architecture
  • Architecture description of Non-3GPP access to EPC
  • Terminology and definitions, such as Trusted vs Un-Trusted access
  • Nodes for un-trusted access over S2b interface – ePDG and 3GPP AAA
  • Relationship between VoLTE and VoWiFi
  • WiFi basics
Module 12: VoWiFi Call Flow Examples
Module 13: VoWiFi Mobility Scenarios
  • Mobility Scenarios with LTE and/or WiFi access
  • Handover scenarios between VoWiFi and VoLTE
  • Trusted Access

Public Schedule

Training Date
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