This book explains how intelligence can be introduced into digital
telephone networks. Beginning by outlining the basic principles of
Intelligent Networks (IN), it tracks the application of the IN principle
of separation of the service logic for advanced telephony services from
the underlying call control infrastructures. The book explains how large
public networks are updated to incorporate IN principles for advanced
telephony services. This is illustrated using many practical examples
which are set against a background of following the ETSI standards
within the overall ITU-T framework of recommendations. This book is
targeted at postgraduate telecommunications students, or engineers
requiring a concise and practical introduction to IN.