Bellamy, John C. Digital telephony by John C Bellamy - 3rd - New York Wiley 2003 - xxv, 643p. - Wiley Series in telecommunications and signal processing . - Proakis, John G. . ISBN: 9814126357 Subjects--Topical Terms: Digital telephone systemsTelecommunication--signal processing Dewey Class. No.: 621.385 B414d3