Understanding Voice over IP

2 Day Course
Code PDN021

Book Now - 2 Delivery Methods Available:

Classroom Virtual Classroom Private Group - Virtual Self-Paced Online


This 2-day VoIP training course looks at the benefits of Voice over IP technology to both small and large organisations, the major standards and present problems with Voice over IP installations. This course is excellent for anyone wishing to gain a solid introduction to this technology and also understand a roadmap for planning and implementation.

Through the power of VoIP traditional voice and data networks are combining to become a single organisational resource. The ability to route voice and data traffic over a single IP network is resulting in major cost savings as the separate network functions are combined within one multi-purpose entity.

Alternative Training Courses in this area:

Delegates requiring a 'Hands On' introduction to Voice over IP should look at:

Hands On Voice over IP

This training course offers the same content as this course, with Hands On labs covering service implementation, Quality of Service and troubleshooting.

Delegates from carrier and service provider backgrounds requiring an introduction to carrier class Voice over IP should look at:

Understanding Multiservice Access and H.248

Understanding MultiService Access and SIP

Both offer an examination of areas such as PPPoE/PPPoA, Session Border Control and Class 5 CPE.

Delivery Options:

For pubic scheduled dates please see the bottom of the outline. This course can also be run onsite at your location.


Delegates attending this course will understand:

  • Current Voice over IP Standards
  • IP Telephony Principles and Applications
  • Real time routing Protocols for VoIP delivery
  • H.323
  • SIP (Session Initiation Protocol)
  • Quality of Service (QoS) Issues wihin VoIP deployments
  • Multi-casting Options for VoIP Services
  • Best Pratice for VoIP Projects


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Introduction (4 topics)

  • Aims and Agendas
  • Voice and Data Convergence
  • Voice Communications
  • Packet Voice Communications

Voice over IP (18 topics)

  • VoIP - How it works
  • VoIP - Encapsulation
  • VoIP - Associated Internet Protocols
  • VoIP - Service Providers
  • Networks
  • The Internet
  • IP Networks
  • Why VoIP
  • What does VoIP Offer?
  • Internet Telephony Product Classes
  • Carrier Class
  • Enterprise Class
  • Single Clients
  • Internet Telephony
  • IPT Class 1
  • IPT Class 2
  • IPT Class 3
  • VoIP Regulatory Bodies

Voice Encoding Schemes (20 topics)

  • Waveform Encoding
  • Digital Recording and Playback
  • PAM - Pulse Amplitude Modulation
  • Quantization
  • Vocoders
  • MOS - Mean Opinion Score
  • Voice Quality Measurement
  • Voice Quality Issues
  • Latency
  • Jitter
  • Silence Suppression
  • Packet Loss
  • Out of Sequence Packets
  • Delayed Packets
  • Duplicate Packets
  • Echo Problems in VoIP
  • Acoustic Echo
  • Hybrid Echo
  • Echo Suppression
  • Echo Cancellation

Protocols - Transport and Network Layers (20 topics)

  • OSI - 7 Layer Model
  • Application Layer (7)
  • Presentation Layer (6)
  • Session Layer (5)
  • Transport Layer (4)
  • Network Layer (3)
  • Data-Link Layer (2)
  • Physical Layer (1)
  • OSI & TCP/IP Layered Models
  • OSI Model Encapsulation
  • ITU-T H.323 Protocol Stack
  • Internet Protocol Version 4
  • TCP - Transmission Control Protocol
  • Multiplexing of Ports and Socket Numbers
  • Passive and Active Connections
  • TCP Header
  • Sliding Windows
  • TCP - Three-way Handshake
  • UDP - User Datagram Protocol
  • UDP Header

Routing Protocols (10 topics)

  • The Routing Process
  • Advertising Networks
  • Discovering Routes
  • Routing Protocols (Interior and Exterior)
  • Autonomous Systems
  • Routing Protocol Categories
  • Distance Vector Routing Protocols
  • Routing Loops
  • EIGRP - A Hybrid Routing Protocol
  • OSPF - A Link-State Routing Protocol

Real-time Protocols (8 topics)

  • ITU-T H.323 Protocol Stack
  • RTP - Real-Time Transport Protocol
  • Encapsulation Overhead
  • RTP Translators
  • Audio Conferencing (Mixers)
  • RTCP - Real-Time Control Protocol
  • RTCP Bandwidth Control
  • RTCP Packet Header

H.323 and Network Elements (9 topics)

  • H.323 Protocol Stack
  • H.323 Components
  • MGCP - Media Gateway Control Protocol
  • Call Signalling
  • Signalling Methods
  • Call Signalling Procedure
  • Standard Call Model
  • fastStart
  • Call Setup Packet Decode

SIP - Session Initiation Protocol (17 topics)

  • SIP Protocol Stack
  • SIP Topology
  • SIP Operation
  • SIP URL (Uniform Resource Locator)
  • SIP Signalling Messages
  • SIP Transaction
  • SDP Session Description Protocol
  • SIP Request and Entity Headers
  • SIP Header Format
  • SIP Compact Message Format
  • SIP Servers
  • Registrar
  • Redirect
  • Proxy
  • SIP Redirect Server Example
  • SIP Proxy Server Example
  • Simple SIP IP Telephony Solution

VoIP Example - Cisco (10 topics)

  • CISCO IP Telephony Components
  • CISCO IP Telephony (Basic Functionality) - (1)
  • CISCO IP Telephony (Basic Functionality) - (2)
  • CISCO IP Telephony (Basic Functionality) - (3)
  • CISCO IP Telephony (Power Supply Options)
  • CISCO CallManager Platforms
  • CISCO CallManager Basic Deployment Model
  • CallManager Secondary Server Functions
  • SRST - Survivable Remote Site Telephony
  • CISCO IP Telephony (Typical Network)

Quality of Service (QoS) (13 topics)

  • Congestion Control
  • Leaky Bucket Algorithm
  • Token Bucket Algorithm
  • Quality of Service Models
  • Integrated Services (IntServ)
  • Differentiated Services (DiffServ)
  • Congestion Management
  • FIFO - First In First Out
  • PQ - Priority Queuing
  • CQ - Custom Queuing
  • WFQ - Weighted Fair Queuing
  • LLQ - Low Latency Queuing
  • MPLS - Multi Protocol Labelled Switching

Multicasting (27 topics)

  • Multicast Enabled Components
  • Review of IP Address Types
  • Multicast Applications
  • Internet MBONE (Multicast Backbone)
  • Tunnelling
  • Distribution Protocols
  • Broadcast vs Multicast
  • Multicast Addressing
  • Multicast Hardware Addressing
  • Multicast IP Addressing
  • Well Known Multicast IP Addresses
  • Multicast Mapping
  • IGMP - Internet Group Message Protocol
  • IGMP Version 1
  • IGMP Version 2
  • IGMP Snooping
  • CGMP - Cisco Group Management Protocol
  • CGMP Joining Procedure
  • CGMP Leaving Procedure
  • Multicast Forwarding Algorithms
  • Flooding
  • Reverse Path Broadcast
  • Truncated Reverse Path Broadcast
  • Reverse Path Multicast
  • PIM - Protocol Independent Multicast
  • PIM - Dense Mode (PIM-DM)
  • PIM - Sparse Mode (PIM-SM)

Review, Evaluation and Glossary


Delegates should have background knowledge of data-communications and IP. Some exposure to Voice communications is also helpful but not essential.

Additional Learning

The courses below may help you meet the knowledge level required to take this course.

Scheduled Dates

Please select from the dates below to make an enquiry or booking.


Different pricing structures are available including special offers. These include early bird, late availability, multi-place, corporate volume and self-funding rates. Please arrange a discussion with a training advisor to discover your most cost effective option.

Code Location Duration Price Jan Feb Mar Apr May Jun
Virtual Classroom (London)
2 Days $2,305

What Our Customers Say

The training was delivered with a high level of expertise and excellence. Instructor was highly knowledgeable.”

Technical Trainer, Aviat Networks

Overall the course was really good, the trainer really understood the material and was very approachable.”

Customer Training Manager, Aviat Networks

Excellent course, informative and well-paced.”

CSE, Cisco

Course was very well outlined. Topics were great and bridged many gaps.”

System Engineer, Cable & Wireless

An excellent intro to video encoding & MPEG transport streams - I would definitely recommend it.”

Broadcast Engineer, Cisco

Definitely an excellent intro. Left me interested in learning more.”

Broadcast Engineer, Eircom

Excellent training course with real examples and practical classroom demonstrations.”

Transport Designer, Orange

Instructor knowledge and experience was excellent.”

Solutions Engineer, Akamai

Excellent course, very clear and well organised. Course content delivery was very good.”

Assistant Engineer, Dhiraagu

Very informative and appropriate.”

Network Support Technician, BT

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