IP Telephony Cookbook

IP Telephony Cookbook

Introduction

• Goal

The IP Telephony Cookbook is a reference document addressing technical issues for the setup of

IP Telephony solutions. Its goal is to provide the user community with guidelines and information

about the IP Telephony world and everything related to it. Since the Cookbook is intended to be

a technical document, the main target audience are the network engineers and system

administrators at universities and national research and education networks (NREN); however,

university students and researchers may find it useful, both for enriching their technological

background as well as for finding information about advanced research topics and projects in the

European community

• Reasons for writing this document

Members of the NREN community asked TERENA to start an investigation into IP Telephony
in September 2001.The response was very positive and suggestions were made to co-ordinate
the creation of a cookbook with recommendations for setting up IP Telephony solutions at
university- and national-level, with information about protocols and the interoperability of
equipment as well as about integration with the existing international hierarchies for IP
videoconferencing. For this reason, a number of people in the TERENA community with
significant expertise in the area of IP Telephony decided to undertake this task and to compose
this document,The IP Telephony Cookbook

• Contents

The IP Telephony Cookbook is divided into chapters, which guide the reader through increasing
levels of knowledge of the IP Telephony world.This first chapter contains introductory
information and gives details of the contents of the Cookbook, useful tips on how to read this
document and techno-economic considerations. Chapter 2 explains the technological
background needed in order to understand the topics addressed in the rest of the Cookbook.This
chapter describes the basic IP Telephony components and gives an overview of the IP Telephony
protocols. Chapter 2 ends with additional considerations on call routing and perspectives about
the future. Chapter 3 gives a high-level overview of scenarios a user may face when building an
IP Telephony environment. Details are given to explain what a particular scenario is about, what is
needed in order to deploy it and what needs it is serving.The next three chapters (Chapter 4,
Chapter 5 and Chapter 6) detail how to set up IP Telephony services; those chapters give the
reader the chance to learn how to set up basic services, advanced services (still telephony-centric)
and value-added services (with respect to classic telephony service). Chapter 7 is about the

integration of global telephony, describing the technological solutions available for the integration
of global IP Telephony and the successful replacement of classic telephony. Chapter 7 reports on
today's situation, as well as migration and future trends.The last chapter contains the
regulatory/legal considerations users have to be aware of when moving from classic telephony to
IP Telephony.The topics here relate to the regulation of IP Telephony in Europe and in other
countries outside the European Union.A large number of legal issues for classic telephony are
detailed, from licensing to unbundling, and their mapping to the IP world. Finally, the IP
Telephony Cookbook contains two annexes.Annex A lists and describes current and future IP
Telephony Projects in Europe.Annex B gives the reader useful information about IP Telephony
hardware and software, reporting ‘hands on’ experience (i.e., how the devices performed, how
good tech-support was, what were the workarounds for some of the problems faced, etc).
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