ChanIsAvail
[Synopsis]
Check channel availability
[Description]
This application will check to see if any of the specified channels are available. This application sets the following channel variables: ${AVAILCHAN}: The name of the available channel, if one exists ${AVAILORIGCHAN}: The canonical channel name that was used to create the channel ${AVAILSTATUS}: The device state for the device ${AVAILCAUSECODE}: The cause code returned when requesting the channel
[Syntax]
ChanIsAvail([Technology2/Resource2[&…]][,options])
[Arguments]
Technology2/Resource2
Optional extra devices to check If you need more then one enter them as Technology2/Resource2&Te chnology3/Resourse3&.....
Technology/Resource
Specification of the device(s) to check. These must be in the format of 'Technology/Resource', where <Technology> represents a particular channel driver, and <Resource> represents a resource available to that particular channel driver.
options
a: Check for all available channels, not only the first one
s: Consider the channel unavailable if the channel is in use at all
t: Simply checks if specified channels exist in the channel list
[See Also]
Пример
[from-test]
exten => _X.,1,Macro(chanisavail,${EXTEN})
[macro-chanisavail]
exten => s,1,Set(_TRK=SIP/siptrunk)
exten => s,n,ChanIsAvail(${TRK}1&${TRK}2&${TRK}3&${TRK}4,a)
exten => s,n,Dial(${CUT(AVAILCHAN,,1)}/${ARG1},,e)