Audio Codec Parameters

You can configure a set of codec properties to improve consistency and reduce workload on the phones.

Use the parameters in the following table to specify the priority for audio codecs on your Polycom phones. If 0 or Null, the codec is disabled. A value of 1 is the highest priority.

If a phone does not support a codec, it treats the setting as if it were 0 and not offer or accept calls with that codec. The phone ignores the unsupported codec and continues to the codec next in priority. For example, using the default values, the VVX 310 doesn't support G.722.1C or G.719 and uses G.722.1 as the highest-priority codec.

Table 1. Audio Codec Parameters

Template

Parameter

Permitted Value

Default

Change Causes

Restart or Reboot

site.cfg

voice.codecPref.G711_A

0 to 27

7

No

site.cfg

voice.codecPref.G711_Mu

0 to 27

6

No

site.cfg

voice.codecPref.G719.32kbps

0 to 27

0

No

site.cfg

voice.codecPref.G719.48kbps

0 to 27

0

No

site.cfg

voice.codecPref.G719.64kbps

0 to 27

0

No

site.cfg

voice.codecPref.G722

0 to 27

4

No

site.cfg

voice.codecPref.G7221.24kbps

0 to 27

0

No

site.cfg

voice.codecPref.G7221.32kbps

0 to 27

0

No

site.cfg

voice.codecPref.G7221_C.24kbps

0 to 27

5

No

site.cfg

voice.codecPref.G7221_C.32kbps

0 to 27

0

No

site.cfg

voice.codecPref.G7221_C.48kbps

0 to 27

2

No

site.cfg

voice.codecPref.G729_AB

0 to 27

8

No

site.cfg

voice.codecPref.iLBC.13_33kbps

0 to 27

0

No

site.cfg

voice.codecPref.iLBC.15_2kbps

0 to 27

0

No

site.cfg

voice.codecPref.Lin16.8ksps

0 to 27

0

No

site.cfg

voice.codecPref.Lin16.16ksps

0 to 27

0

No

site.cfg

voice.codecPref.Lin16.32ksps

0 to 27

0

No

site.cfg

voice.codecPref.Lin16.44_1ksps

0 to 27

0

No

site.cfg

voice.codecPref.Lin16.48ksps

0 to 27

0

No

site.cfg

voice.codecPref.Siren7.16kbps

0 to 27

0

No

site.cfg

voice.codecPref.Siren7.24kbps

0 to 27

0

No

site.cfg

voice.codecPref.Siren7.32kbps

0 to 27

0

No

site.cfg

voice.codecPref.Siren14.24kbps

0 to 27

0

No

site.cfg

voice.codecPref.Siren14.32kbps

0 to 27

0

No

site.cfg

voice.codecPref.Siren14.48kbps

0 to 27

3

No

site.cfg

voice.codecPref.Siren22.32kbps

0 to 27

0

No

site.cfg

voice.codecPref.Siren22.48kbps

0 to 27

0

No

site.cfg

voice.codecPref.Siren22.64kbps

0 to 27

1

No

site.cfg

voice.codecPref.SILK.8ksps

0 to 27

0

No

site.cfg

voice.codecPref.SILK.12ksps

0 to 27

0

No

site.cfg

voice.codecPref.SILK.16ksps

0 to 27

0

No

site.cfg

voice.codecPref.SILK.24ksps

0 to 27

0

No