John C. Bellamy is the author of Digital Telephony, 3rd Edition, published by Wiley.
...strongly recommended for academic libraries serving electrical engineering and telecommunications programs including those owning an earlier edition... (E-Streams, Vol. 4, No. 5, 2001) ...provides the reader with the opportunity to review the entire area of telephony and digital telephony in particular. (New Books and Multimedia, January 2001)