Specifies the voice codec and encoding scheme used towards the IP side of a VoIP call.
The selected codec affects the audio quality and bandwidth consumption of VoIP calls to which you apply the Voice Codec Profile (in the Media Profiles List). The codec choice depends on the interoperability requirements for connecting to other voice peers and bandwidth requirements. Most codecs use data compression algorithms, which saves bandwidth but slightly reduces the voice quality. G.711 does not use compression and requires more bandwidth.
The following codecs are supported on
platform:
- G.711 A-Law
- G.711 u-Law
- G.722
- G.722.2
- G.723.1
- G.726
- G.729
- Opus
- SILK
Codec - Additional Specifications
- G.722 Wideband Codec: Supports 20ms packet sized and a bit-rate of 64Kbps only.
- G.722 or AMR-WB channels: Does not support fax data detection support.
- G.722.2: Appears only if the AMR License is installed.
- G.726: Supports 32 Kbps bit rate only.
- G.729: Supports G.729A and G.729AB. The variant used when selecting G.729 depends upon the setting of Media List flag Silence Suppression. If Silence Suppression is enabled, G.729AB is used.
- Opus: Supported in only.
NOTE: Applicable to the SBC SWe Lite initiating FAX setup. A G.711 codec must be used for fax detection; tones are detected on the G711 egress (answering CED tone) leg. Otherwise the peer has to initiate fax path.