Revised and updated, this edition reflects the growing importance of Asynchronous Transfer Mode (ATM). The book continues to survey the situation concerning B-ISDN and gives a comprehensive description of CCITT standards for B-ISDN. The principles of ATM and Synchronous Digital Hierarchy are a central part of the book. New features include: ATM type 5; higher-layer protocols and internetworking issues; and ATM switching and transmission equipment.