Abstract
An important aspect of digital switching is that the distinction between where the digital switch ends and digital transmission begins is very blurred (hence the term integrated transmission and switching). Many functions that were once thought to reside in the transmission world are now included in the switching system. The purpose of this chapter is to describe many of these transmission functions, including the interface to digital transmission facilities in both the trunk and subscriber loop plant. These interfaces are the digital counterparts to the analog terminations described in Chapter 7. This chapter will also discuss some applications of digital signal processing (DSP) that are resident in the digital switching system or are expected to be resident there in the future. These include transmission functions such as tone generation and detection, echo suppression, echo cancellation, and speech and video processing such as speech and video compression, voice response, and speech recognition.
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Messerschmitt, D.G. (1990). Digital Terminations and Digital Signal Processing. In: McDonald, J.C. (eds) Fundamentals of Digital Switching. Applications of Communications Theory. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-9880-6_8
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DOI: https://doi.org/10.1007/978-1-4684-9880-6_8
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