MicroNet SP5004 Manuel d'utilisateur télécharger pdf (Page 31)

All VoIP packets are made up of two components: voice samples and IP/UDP/RTP

headers. Although the voice samples are compressed by the Digital Signal Processor

(DSP) and may vary in size based on the codec used, these headers are a constant

40 bytes in length. This table shows the nominal Ethernet bandwidth consumption.

Codec

Bit Rate

(Kb/s)

Nominal Ethernet Bandwidth

G.723.1 5.3 / 6.4

20.8 kbps (for 5.3 frame bit rate)

21.9 kbps (for 6.4 frame bit rate)

G.729 8 31.2 kbps

G.711 64 87.2 kbps

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MicroNet SP5004 Manuel d'utilisateur Page 31