Comet Labs IPTEL-S Manual do Utilizador descarregar pdf (Página 43)

8/31/2005 Copyright - Ahlgren 2005 43

AhlTek

VoIP Codecs –

Bandwidth Requirements

Codec Algorithm Kb/s* MOS**

G.711 PCM 64 4.1

G.726 ADPCM 32 3.85

G.729 CS-ACELP 8 3.92

G723.1 ACELP 5.3 3.56

* Kb/s can increase by ~1.5-2 x in wireless networks

** The voice transmission quality is measured by the MOS

(Mean Opinion Score),

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Comet Labs IPTEL-S Manual do Utilizador Página 43