Bellamy, John creator New York Wiley c1991 2nd ed. xix, 572 p. : ill. ; 25 cm. Background and Terminology (Page-1), Why Digital (Page-75), Voice Digitization (Page-93), Digital Transmission and Multiplexing (Page-165), Digital Switching (Page-225), Digital Modulation and Radio Systems (Page-279), Network Synchronization Control and Management (Page-333),Fiber Optic Transmission Systems (Page-381), Data and Integrated Services Digital Networks (Page-431), Traffic Analysis (Page-459). John Bellamy. Digital telephone systems 621.385,BEL 0471620564 90037906 http://www.loc.gov/catdir/enhancements/fy0607/90037906-d.html http://www.loc.gov/catdir/enhancements/fy0607/90037906-t.html http://www.loc.gov/catdir/enhancements/fy0607/90037906-d.html http://www.loc.gov/catdir/enhancements/fy0607/90037906-t.html 20221223101231.0