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 150 business IP phone does not support Opus codec.
  • VVX 250, 350, and 450 business IP 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: When you enable video on VVX 500/501 and 600/601 phones, the G.722.1C codec is disabled. Due to performance constraints, Polycom also recommends disabling the SILK and G.720 AB/Opus codec when video is enabled on VVX 501 and 601 phones.
Table 1. Audio Codec Priority

Phone

Supported Audio Codecs

Priority

VVX 101

VVX 201

VVX 150

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

VVX 250, 350, 450

* 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