00000nam 2200000zi 4500 9.870103 CaOODSP 20221107163030 m o d f cr ||||||||||| 190318e1978 onc||||fot f||| 0 eng d CaOODSP eng rda CaOODSP n-cn--- Co24-16/1978E-PDF Brackett, Peter O., author. Digital transmission of voice / by Dr. Peter O. Brackett, Associate Professor. Ottawa: Department of Communications, March 1978. 1 online resource (iv, 115 pages) : figures. text txt rdacontent computer c rdamedia online resource cr rdacarrier Digitized edition from print [produced by Innovation, Science and Economic Development Canada]. Includes bibliographical references. "The problem being considered in this study concerns the difficulty of observing and monitoring the telecommunications traffic, flowing through an interconnection between a digital network and the public switched network. The purposes of monitoring are to determine which of the many possible such circuits carrying this traffic are being used for digital voice and to obtain irrefutable evidence of such use. The state-of-the-art of voice digitizing and data encryption technology is reviewed with the conclusion that it is quite feasible to use such an interconnection for the purposes of digital voice communication"--Abstract. gccst Computer networks gccst Digital technology gccst Telecommunications Canada. Department of Communications. PDF 1.56 MB https://publications.gc.ca/collections/collection_2019/isde-ised/Co24-16-1978-eng.pdf