Bellamy, John C. Digital telephony / John C. Bellamy - 3rd ed. - New York : John Wiley, c2003. - xxv, 643 p. : ill. ; 24 cm. - Wiley series in telecommunications and signal processing . Includes index. ISBN: 9814126357 LCCN: Subjects--Topical Terms: Digital telephone systems LC Class. No.: TK5103.7 / .B44 2003 Dewey Class. No.: 621.385 / B435d