Per Beming & Dan Bensky 
Communications Engineering Desk Reference [PDF ebook] 

A one-stop desk reference for R&D engineers involved in communications engineering, this book will not gather dust on the shelf. It brings together the essential professional reference content from leading international contributors in the field. Material covers a wide scope of topics, including voice, computer, facsimile, video, and multimedia data technologies. A hard-working desk reference, providing all the essential material needed by communications engineers on a day-to-day basis Fundamentals, key techniques, engineering best practice and rules-of-thumb together in one quick-reference sourcebook Definitive content by the leading authors in the field