This important book provides a comprehensive, authoritative overview of the technology and standards of ISDN and Broadband ISDN. The most complete and authoritative exploration of ISDN, this book provides unrivaled coverage of ISDN, broadband ISDN (B-ISDN), Signaling System Number 7 (SS7), and Asynchronous Transfer Mode (ATM). The book also presents a discussion of frame relay that incorporates the most important advances in both technology and standards in this area crucial to ISDN and private networks. It provides full treatment of standards including CCITT recommendations, Frame Relay Forum specifications, and ATM Forum specifications The fourth edition of ISDN and Broadband ISDN with Frame Relay and ATM has been revised to include new material on xDSL and ADSL; ATM traffic; and the available bit rate (ABR) service of ATM. This edition also includes updated coverage of ITU-T standards and ATM Forum standards. An essential reference for every programming professional.