This codec offers superb sound quality and requires 64kbps of bandwidth. The problem with iLBC is that it is processor intensive that is also why it is not implemented in very many hardphones.Īnother classic, from the suite of ISDN codecs. The sound quality is excellent, and the bandwidth is limited to between 13.3kbps and 15kbps (depending on frame size). ILBC is a sort of secret weapon for use in low-bandwidth situations. The bandwidth is 13.3kbps, and the quality is acceptable, if not exactly overwhelming. The following list briefly examines the most commonly used codecs in Asterisk: GSMĪn Asterisk “classic” and familiar to anyone with GSM mobile phone service. The CLI command core show translation, which displays the table shown earlier, will show you which codecs are available on your system (namely, all those with numbers in their respective columns).
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