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  • OPUS 
    • opus@48000h@10i - Opus 48khz using 10 ms ptime (mono and stereo)
    • opus@48000h@20i - Opus 48khz using 20 ms ptime (mono and stereo)
    • opus@48000h@40i - Opus 48khz using 40 ms ptime
    • opus@16000h@10i - Opus 16khz using 10 ms ptime (mono and stereo)
    • opus@16000h@20i - Opus 16khz using 20 ms ptime (mono and stereo)
    • opus@16000h@40i - Opus 16khz using 40 ms ptime
    • opus@8000h@10i - Opus 8khz using 10 ms ptime (mono and stereo)
    • opus@8000h@20i - Opus 8khz using 20 ms ptime (mono and stereo)
    • opus@8000h@40i - Opus 8khz using 40 ms ptime 
    • opus@8000h@60i - Opus 8khz using 60 ms ptime 
    • opus@8000h@80i - Opus 8khz using 80 ms ptime 
    • opus@8000h@100i - Opus 8khz using 100 ms ptime 
    • opus@8000h@120i - Opus 8khz using 120 ms ptime 
  • iSAC
  • CODEC2 2550bps) 8000hz 20ms
  • SILK Skype Audio codec.
    • Provided by mod_silk.
  • iLBC@30i - iLBC using mode=30 which will win in all cases.
  • Speex
    • speex@8000h@20i - Speex 8kHz using 20ms ptime.
    • speex@16000h@20i - Speex 16kHz using 20ms ptime.
    • speex@32000h@20i - Speex 32kHz using 20ms ptime.
  • BroadVoice.
    • BV32 - BroadVoice 16kHz, 32kb/s wideband
    • BV16 - BroadVoice 8kHz, 16kb/s narrowband
      • Provided by mod_bv.
  • Siren
    • G7221@16000h - G722.1 16kHz (aka Siren 7)
    • G7221@32000h - G722.1C 32kHz (aka Siren 14)
  • CELT wideband.
    • CELT@32000h - CELT 32kHz, only 10ms supported
    • CELT@48000h - CELT 48kHz, only 10ms supported
  • DVI
    • DVI4@8000h@20i - IMA ADPCM 8kHz using 20ms ptime. (multiples of 10)
    • DVI4@16000h@40i - 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)
  • G.726
    • 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 (only supports 90ms at this time in FreeSWITCH)
  • G729 - G729 in transcoding mode
  • 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.
    • Provided in core PCM module.

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