This document describes how Cisco Unity versions 3.1(1) and later work with the supported audio codecs and how to configure the Cisco Unity system to use the codecs. A codec is a coder/decoder algorithm or a compression/decompression algorithm. Codecs are used to encode/decode or compress/decompress various types of data that would otherwise use up large amounts of disk space, such as sound and video files. Cisco Unity uses audio codecs with streaming (live conversation) content and file-based (WAV file voice message) content.
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