ISDN design a practical approach by Hardwick, Steve

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An introduction to digital signal processing by Karl, John H.

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Digital signal processing applications to communications and algebraic coding theories by Morgera, Salvatore D. (Salvatore Domenic) 1946-, Krishna, Hari 1960-

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Computers and end-user software with basic by Athey, Thomas, Day, John C., Zmud, Robert W.

ISDN an introduction. by Stallings, William

Programming with data structures Pascal version by Kruse, Robert Leroy 1941-

Principles of digital audio by Pohlmann, Ken C.

Digital filters and signal processing by Jackson, Leland B.

Digital filters by Hamming, R. W. (Richard Wesley), 1915-

Digital image processing and computer vision by Schalkoff, Robert J.