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- SILK Skype Audio codec.
- iLBC@30i - iLBC using mode=30 which will win in all cases.
- Speex
- BroadVoice.
- Siren
- CELT wideband.
- DVI420i DVI420i - IMA ADPCM 8kHz using 20ms ptime. (multiples of 10)
- DVI440i DVI440i - IMA ADPCM 16kHz using 40ms ptime. (multiples of 10)
- GSM@40i - GSM 8kHz using 40ms ptime. (GSM is done in multiples of 20, Default is 20ms)
- G722 - G722 16kHz using default 20ms ptime. (multiples of 10)
- G726-16 - G726 16kbit adpcm using default 20ms ptime. (multiples of 10)
- G726-24 - G726 24kbit adpcm using default 20ms ptime. (multiples of 10)
- G726-32 - G726 32kbit adpcm using default 20ms ptime. (multiples of 10)
- G726-40 - G726 40kbit adpcm using default 20ms ptime. (multiples of 10)
- AAL2-G726-16 - Same as G726-16 but using AAL2 packing. (multiples of 10)
- AAL2-G726-24 - Same as G726-24 but using AAL2 packing. (multiples of 10)
- AAL2-G726-32 - Same as G726-32 but using AAL2 packing. (multiples of 10)
- AAL2-G726-40 - Same as G726-40 but using AAL2 packing. (multiples of 10)
- LPC - LPC10 using 90ms ptime
- PCMU - G711 8kHz ulaw using default 20ms ptime. (multiples of 10)
- PCMA - G711 8kHz alaw using default 20ms ptime. (multiples of 10)
- L16 - L16 isn't recommended for VoIP but you can do it. L16 can exceed the MTU Rather quickly.
- G729 - G729 in passthru mode.
- G729- G729 in transcode mode (opcional)
- G723 - G723.1 in passthru mode.
- AMR - AMR in passthru mode.
- AMR-WB (G.722.2) - AMR-WB in passthru mode.\
- H261 - H.261 Video
- H263 - H.263 Video
- H263-1998 - H.263-1998 Video
- H263-2000 - H.263-2000 Video
- H264 - H.264 Video
- MP4 Video passthrough.
Para os CODECs de vídeo, o sistema suporta apenas passagem, sem possibilidade de transcodificação.
O sistema permite criptografia no padrão SRTP (Secure Real Time Protocol) com troca de chaves por descrição de sessão (SDES). Inclusive permite a conexão entre conexões criptografadas e não criptografadas.