How to detetct inboud abandoned calls in a queue - asterisk

Question

I want to detect incoming calls in a queue, abandoned before being answered by a member of the queue.
The queue_log file makes mention of these ones, so one approach would be to use this. But I'd like to handle this situation within my dialplan, with a command that issues a notification to a discord salon when such calls are detected.
I've tried to use the h extension :
exten = h,1,NoOp("hangup ! cause : ${HANGUPCAUSE}")
same = n,GotoIf($[ ${HANGUPCAUSE} != 16 ]?done)
same = n,system(/myTools/discord-notification "Missed call from ${CALLERID(num)}.")
same = n(done),NoOp()
It works, but it does not differentiate answered calls from not answered / abandoned calls (they both issue a 16 hangup cause).
I've also tried to add a hangup handler using hangup_handler_push but it does not make any difference.
How can I detect such calls within the asterisk diaplan ?

Answer 1

You have use queue_log(probably queue_log in mysql) or check QUEUESTATUS variable after end of call in top level of dialplan.

Answer 2

Besides QUEUESTATUS , Asterisk Queue app sets another channel variable upon completition when a call is abandoned : ${ABANDONED}.
I had to do it manually using this method :
Setting a shared channel variable abandoned to true before executing Queue app, then changing its value to false when the call is answered via Queue GoSub parameter.
And then you can catch its final value via h extension.
exten => _X!,1,Set(SHARED(ABANDONSTATUS,${CHANNEL(LINKEDID)})=true)
exten => _X!,n,Queue(${EXTEN},,,,,,,cust-Queue-GoSub)
exten => _X!,n,Set(SHARED(ABANDONSTATUS,${CHANNEL(LINKEDID)})=false)
exten => _X!,n,HangUp()
exten => h,1,NoOp(Abandoned : ${SHARED(ABANDONSTATUS,${CHANNEL(LINKEDID)})})
[cust-Queue-GoSub]
exten => s,1,Set(SHARED(ABANDONSTATUS,${CHANNEL(LINKEDID)})=false)
exten => s,n,Return()