Introduction to ATM

1 Day Course
Code PDN080

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Scheduled Online Onsite


This one-day seminar is designed to provide an overview of ATM for those completely new to the subject; it assumes no prior knowledge of ATM theory. The intention of the seminar is to convey the functional aspects of ATM without going into the mechanisms behind that functionality any more than is necessary to understand the concepts involved. As such this course is more of a 'what can be done' approach rather than 'how is it done'. It covers the basic mechanics of the technology: cells, channels, paths and connections, and explains the principles of ATM network design in both the local and wide area. The addressing structure for establishing ATM connections is described from a functional perspective and the amount of configuration required to implement an ATM network is explained. We describe the types of connection that are available and the concepts of quality of service so far as to describe how ATM networks are able to carry multimedia applications and handle a mixture of data types at the same time. The main ATM applications are then examined: LAN emulation, video conferencing and video distribution, also voice over ATM, again from a functional perspective.

The notes that accompany this seminar are comprehensive, and provide a textual explanation that contains much more detail than is covered in the seminar itself. The objective is to give delegates sufficient follow-up material to enable them to read further on any subject of particular interest to them.


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Basic Concepts (8 topics)

  • What does an ATM network look like?
  • The basic principles of cell switching
  • Connection identifiers and how they are used
  • ATM connection characteristics
  • Virtual channels and virtual paths why they are there and when they are used
  • What are Soft PVCs and where are they used
  • What we mean by the UNI and NNI interfaces.
  • ATM layer Operation And Maintenance (OAM) features

Above and Below (6 topics)

  • What is ATM adaptation and why do we need it
  • The layered approach to adaptation
  • The ATM protocol architecture
  • Common layer ATM adaptation protocols (AAL1/AAL2/AAL5)
  • The main physical layers used by ATM
  • ATM over SDH and PDH networks

Traffic Management and Quality of Service (5 topics)

  • ATM Quality of Service (QoS)
  • ATM service categories CBR rt-VBR nrt-VBR UBR ABR GFR
  • ATM traffic contracts
  • Sizing considerations for ATM networks
  • The essential principles of traffic management

Addressing and Signalling (6 topics)

  • Private and public ATM address structure
  • Address assignment in ATM networks
  • The components of ATM signalling
  • The UNI signalling protocol and its modular structure
  • A walk through of connection set-up
  • Overview of Private Network Network Interface (PNNI) call routeing

ATM Network Management (3 topics)

  • The ATM network management architecture
  • ATM Forum Management Interfaces
  • Integrated Local Management Interface (ILMI)

ATM Applications (5 topics)

  • Circuit emulation and TDM services over ATM
  • Voice and Telephony Architecture for ATM
  • ITU-T voice trunking over ATM
  • Data over ATM router configurations
  • Multiprotocol encapsulation over ATM


The course assumes no prior knowledge of ATM; a basic understanding of datacoms would be helpful.

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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