Supported Audio Codecs

The following table details the supported audio codecs and priorities for Polycom phone models.

Note the following limitations when using the Opus codec:
  • VVX 301, 311, 401, 411, 500, 501, 600, and 601 business media phones support a single Opus stream. Users can establish only one call at a time when using the Opus codec on these phones.
  • VVX 500 and 600 do not support video when using Opus.
  • VVX 500 and 600 do not support local conferences when using Opus.
  • Opus is not compatible with G.729 and iLBC. If you set Opus to the highest priority, G.729 and iLBC are not published; if you set G.729 and iLBC to the highest priority, Opus is not published.
    Note: On the VVX 500/501 and 600/601, when you enable video, the G.722.1C codec is disabled.
    Table 1. Audio Codec Priority

    Phone

    Supported Audio Codecs

    Priority

    VVX 101, 201

    G.711µ-law

    6

    G.711a-law

    7

    G.722

    4

    G.729AB

    8

    iLBC (13.33kbps, 15.2kbps)

    0, 0

    VVX 300/301, 310/311, 400/401, 410/411

    * Note: VVX 301, 311, 401, 411 support a single Opus stream.

    VVX 300, 310, 400, 410 do not support Opus.

    G.711µ-law

    6

    G.711a-law

    7

    G.722

    4

    G.722.1 (24kbps, 32kbps)

    5

    G.729AB

    8

    iLBC (13.33kbps, 15.2kbps)

    0, 0

    Opus*

    0

    Siren 7

    0

    VVX 500/501, 600/601

    • VVX 500 and 600 support a single Opus stream.
    • VVX 500 and 600 do not support both Opus and video.

    G.711 µ -law

    6

    G.711a-law

    7

    G.722

    4

    G.722.1 (24kbps, 32kbps)

    5

    G.722.1C (48kbps)

    2

    G.729AB

    8

    Opus*

    0

    iLBC (13.33kbps, 15.2kbps)

    0, 0

    Siren 7

    0

    VVX 1500

    G.711 µ -law

    6

    G.711a-law

    7

    G.719 (64kbps)

    0

    G.722

    4

    G.722.1 (24kbps, 32kbps)

    5

    G.722.1C (48kbps)

    2

    G.729AB

    8

    Siren14 (48kbps)

    3

    iLBC (13.33kbps, 15.2kbps)

    0, 0

    SoundStructure VoIP Interface

    • SoundStructure VoIP Interface supports a single Opus stream.
    • SoundStructure VoIP Interface does not support both Opus and video.

    G.711 µ -law

    6

    G.711a-law

    7

    G.722

    4

    G.722.1 (24kbps, 32kbps)

    5

    G.722.1C (48kbps)

    2

    G.729AB

    8

    iLBC (13.33kbps, 15.2kbps)

    0, 0

    Siren 7

    0