Synopsis:

 CHANNEL(item)

Description:

 Gets/set various pieces of information about the channel.  (New in 1.4)

item may be one of the following:

Read/write	Item	Description
R/O	audioreadformat	format currently being read
R/O	audionativeformat	format used natively for audio
R/O	audiowriteformat	format currently being written
R/W	callgroup	call groups for call pickup
R/O	channeltype	technology used for channel
R/W	language	language for sounds played
R/W	musicclass	class (from musiconhold.conf) for hold music
R/O	state	state for channel
R/W	tonezone	zone for indications played
R/O	videonativeformat	format used natively for video

Notes

• Those items marked R/W above may be both read and set.
• *CLI> show function CHANNEL
• Additional items may be available from the channel driver providing the channel; see its documentation for details.
• Any item requested that is not available on the current channel will return an empty string.

Return value

Returns the resulting string.

Example

exten => s,1,Set(foo=${CHANNEL(channeltype)})

exten => s,1,Set(CHANNEL(callgroup)=g3)

See also

• Asterisk variables
• Asterisk functions

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• Asterisk - documentation of application commands