Codecs

Codecs are used to convert analog to digital voice signals and vice versa. These options set preferred codecs used by the extension.

NOTE: If some of the desired codecs cannot be checked, go to 'Settings: Servers: Edit: Default Codecs' and enable them under the 'Remote' group.

Disallow:

Set the codecs trunk is now allowed to use

Example: This field is very unique. In order to work properly, this setting is automatically set to 'Disallow All' and it cannot be modified

Field Type: Read only

Allow:

Codecs that are allowed in 'Settings: Server' will be enabled for selection.

Example: all

•	ITU G.711 ulaw - 64 Kbps, sample-based, used in US

•	ITU G.711 alaw - 64 Kbps, sample-based, used in Europe

•	ITU G.723.1 - (5.3/6.3 Kbps, 30ms frame size

•	ITU G.726 - 16/24/32/40 Kbps

•	ITU G.729 - 8 Kbps, 10ms frame size

•	GSM - 13 Kbps (full rate), 20ms frame size

•	iLBC - 15Kbps,20ms frame size: 13.3 Kbps, 30ms frame size

•	Speex - 2.15 to 44.2 Kbps

•	LPC10 - 2.5 Kbps

•	H.261 Video - Used over ISDN lines with resolution of 352x288

•	H.263 Video - Low-bit rate encoding solution for video conferencing

•	H.263+ Video - Extension of H.263 that provides additional features that improve compression over packet switched networks.

Field Type: Check boxes