Bellamy, John, Digital telephony / John C. Bellamy. - 3rd ed. - New York : Wiley, c2000. - xxv, 643 p. : ill. ; 24 cm. - Wiley series in telecommunications and signal processing . Shelf # 15, Row # 3, Communication. ISBN: 9814126357 LCCN: 99034015 Subjects--Topical Terms: Digital telephone systems. Dewey Class. No.: 621.385 BEL