Practical Fundamentals of Voice over IP (VoIP) for Engineers and Technicians

THE WORKSHOP

In the past five years, technologies have converged to such an extent that one can transmit voice, fax and video over the same internet protocol network that one uses for data. This workshop examines Voice over IP (VoIP) technologies and provides you with the skills to competently implement a VoIP network for your organisation. Numerous case studies and exercises throughout the course ensure that you get a good grasp on the technologies used. Solid practical advice is given on application, implementation and most importantly troubleshooting these systems.

WHAT IS INCLUDED?

  • Receive a certificate of attendance in support of your continuing professional commitment
  • All workshops include the associated hardcopy technical manual
  • Printed workshop handouts
  • Lunch and refreshments
  • Interact and network with workshop attendees and experienced instructors
  • Practical, industry driven content to assist you in your continuing professional development (CPD)
  • Attendees automatically become IDC subscribers and receive exclusive deals and technical content every month

WHO SHOULD ATTEND?

  • Electrical engineers and technicians
  • Engineering managers
  • Field technical support staff
  • Instrumentation engineers and technicians
  • IT personnel
  • Maintenance engineers
  • Managers
  • Network administrators
  • Process control engineers and technicians
  • Process engineers
  • Project engineers
  • Sales engineers
  • Software engineers
  • Systems engineers
  • Technicians

CONTENT SUMMARY

INTRODUCTION    

  • Overview
  • Speech Quality
  • Delay (Latency)
  • Jitter.
  • Packet Loss

TELECOMMUNICATIONS FUNDAMENTALS

  • Introduction
  • Local Loops
  • Trunks
  • Switching

TCP/IP           

  • Overview
  • The OSI reference model
  • TCP/IP protocol suite
  • LANs (Local area networks)
  • Ethernet
  • Internet protocol
  • Transmission control protocol (TCP)
  • User datagram protocol (UDP)
  • Routers
  • Wide Area Networks
  • ISDN- Integrated services digital network
  • Digital subscriber lines (DSL)
  • SDH/SONET
  • Frame Relay
  • IP over ATM networks
  • Real time transport protocol (RTP)
  • Real time transport control protocol (RTCP)

H.323 

  • The H.323 architecture
  • H.323 protocol format
  • H.323 addressing
  • RAS messages
  • Discovery of a gatekeeper
  • Registration and deregistration by an endpoint
  • H.245 control signaling
  • H.245 operations
  • Different call scenarios

SESSION INITIATION PROTOCOL 

  • SIP components
  • Message headers
  • The Session Description Protocol (SDP)
  • SIP protocols
  • Comparison between SIP and H.323

MEDIA GATEWAY CONTROL AND MEGACO/H.248 PROTOCOL

  • Introduction
  • Media gateway control protocol
  • MEGACO/H.248

SIGTRAN     

  • SS7 signaling network architecture
  • SS7 protocol suite
  • SIGTRAN protocol stack
  • Stream Control Transmission Protocol (SCTP)

INTRODUCTION TO VOICE PORTS AND DIAL PEERS        

  • Voice ports
  • Configuring FXO or FXS voice ports
  • Fine tuning FXS/FXO ports
  • Optional configuration for FXS/FXO ports
  • Configuring E&M voice ports
  • Digital interfaces
  • Dial peers and call legs

QUALITY OF SERVICE IN VOIP 

  • Compressed real-time transfer protocol (CRTP)
  • QOS service models
  • Quality of service solutions
  • VOIP over MPLS

SPEECH CODING TECHNIQUES            

  • Sampling of voice
  • Types of speech codecs
  • Overview of source coding standards

TRAFFIC THEORY BASICS         

  • Traffic load measurement
  • Network capacity measurements
  • Grade of service
  • Traffic model selection criteria
  • Traffic models
  • Applying traffic analysis to VOIP networks
  • Point-to-point versus point-to-multipoint
  • End-to-end traffic analysis example

DEVELOPING A DIAL PLAN FOR A VOIP NETWORK          

  • Dial plan organization
  • Dial plan overview
  • Principles for designing large-scale dial plans
  • Number normalization for an international dial plan example
  • Call topologies for VOIP networks
  • Fault tolerance in dial plans

VOIP IMPLEMENTATION OVER SIP

  • Components for implementation of VOIP infrastructure solution over SIP
  • Implementation of VOIP for SIP in a phased manner
  • Processing of calls between SIP IP telephony networks
  • Call processing between an SIP IP telephone and a PSTN phone

FAX OVER IP (FOIP)          

  • Standards
  • Transmission of fax messages over IP
  • H.323 and fax
  • Email-based fax

VIDEO CONFERENCING OVER VOIP  

  • Video conferencing using H.323
  • H.323 video conferencing components
  • Multipoint Conference Unit (MCU)
  • Objectives of video conferencing solutions over IP
  • Deployment models
  • Network infrastructure
  • Quality of service tools for wide area networks
  • Call Admission Control (CAC)
  • H.323 video over IP dial plan architecture
  • Single zone dial plan
  • Zone prefix design
  • Multi zone dial plan
  • Call routing scenarios

TESTS, MEASUREMENTS AND TROUBLESHOOTING VOIP NETWORKS          

  • Factors affecting voice quality
  • Tunable and adjustable parameters in VOIP equipment
  • Troubleshooting in a H.323 VOIP network
  • Testing SIP

VOIP BANDWIDTH CALCULATION      

  • Overview
  • The codec
  • Packet overhead and latency
  • The  protocol headers
  • The mransmission media

CONCLUSION

  • Revision
  • Pulling all the strands together

PRACTICAL SESSIONS

The theory will be supported by practical sessions to include:

  • Setting up a SIP server
  • Setting up PC based softphones
  • VOIP calls through  Asterisk SIP server
  • Packet analysis of SIP operation
  • Effect of different codecs on speech quality
  • Configuration of FXS ports on voice router
  • Setting up dial peers on voice router
  • Interception and analysis of VOIP conversations
  • Effect of bandwidth and  packet loss on speech quality

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