[asterisk-users] Asterisk outbound calling does not wait for answer before playback

[Robert DeVries]

Although probably not what you want to hear, I don't think there is any way
that Asterisk will detect answering supervision on an analog POTS line (I
believe that there used to be an option with some Telcos to get a polarity
reversal upon answering, but I don't think that is possible any more.)  If
you were willing to make the calls using a VOIP provider like Voipjet you
would not have this problem, but that might not meet your needs for other
reasons.

On 2/8/07, Alvin Austin <aan at crlogic.com> wrote:
>
> Hello Asteriskers, :-)
>
> We're trying to set up an outbound notification calling for system
> alerts with Asterisk 1.4.0.  We generate a call file in
> /var/spool/asterisk/outgoing and the outbound call is originated through
> Zap/1 (Sangoma A200D to a Canadian POTS line).  The problem is that
> Asterisk does not wait for the other side to answer before it starts
> playing the message.  So the person called answers the phone after the
> second or third ring and only hears the tail end of the message and the
> "goodbye".
>
> Ideally, we want to deliver the message immediately after the person
> answers, or if an answering machine picks up, right after the "beep".
>
> Any suggestions?
>
> (1) The call file generator script (works ok):
> #!/bin/sh
>
> TMPFILE=`mktemp /tmp/tmp.XXXXXXX` || exit 1
> echo "TMPFILE = $TMPFILE"
>
> cat <<EOT > $TMPFILE
> Channel: Zap/g1/phone_number_here
> Callerid: SYSTEM
> MaxRetries: 2
> RetryTime: 60
> WaitTime: 30
> Context: dialout
> Extension: s
> Priority: 1
> EOT
>
> mv -v $TMPFILE /var/spool/asterisk/outgoing
>
> (2) The dialout context in extensions.conf (problem - starts playback
> before call is answered)
> [dialout]
> exten => s,1,NoOp(Dialout)
> exten => s,n,Set(TIMEOUT(digit)=5)
> exten => s,n,Set(TIMEOUT(response)=8)
> exten => s,n,Set(MACHINE=0)
> exten => s,n,Answer
> exten => s,n,BackgroundDetect(silence/5,1000,50)
> exten => s,n,NoOp(Ans Machine detected)
> exten => s,n,Set(MACHINE=1)
> exten => s,n,BackgroundDetect(silence/30,1000,50,30050)
> exten => s,n,NoOp(Ans Machine Message Too Long)
> exten => s,n,Hangup
>
> exten => talk,1,GotoIf($[${MACHINE}=1]?machine:human)
> exten => talk,2(machine),Goto(dialout-machine,s,1)
> exten => talk,3(human),Goto(dialout-human,s,1)
>
> [dialout-machine]
> exten => s,1,NoOp(Dialout to Ans Machine)
> exten => s,n,Playback(/tmp/asterisk-recording)
> exten => s,n,Wait(1)
> ; we'd like to do something to wait for the "beep" here...
> exten => s,n,Playback(vm-goodbye)
> exten => s,n,Hangup
>
> [dialout-human]
> exten => s,1,NoOp(Dialout to Human)
> exten => s,n,Playback(/tmp/asterisk-recording)
> exten => s,n,Wait(1)
> exten => s,n,Playback(vm-goodbye)
> exten => s,n,Hangup
>
>
> (3) *CLI>
>     -- Attempting call on Zap/1/1234567 for s at dialout:1 (Retry 1)
>        > Channel Zap/1-1 was answered.
>     -- Executing [s at dialout:1] NoOp("Zap/1-1", "Dialout") in new stack
>     -- Executing [s at dialout:2] Set("Zap/1-1", "TIMEOUT(digit)=5") in new
> stack
>     -- Digit timeout set to 5
>     -- Executing [s at dialout:3] Set("Zap/1-1", "TIMEOUT(response)=8") in
> new stack
>     -- Response timeout set to 8
>     -- Executing [s at dialout:4] Set("Zap/1-1", "MACHINE=0") in new stack
>     -- Executing [s at dialout:5] Answer("Zap/1-1", "") in new stack
> (Problem: Asterisk does not wait until the call is answered on the far
> end!)
>     -- Executing [s at dialout:6] BackgroundDetect("Zap/1-1",
> "silence/5|1000|50") in new stack
>     -- Playing 'silence/5' (language 'en')
>     -- Executing [talk at dialout:1] GotoIf("Zap/1-1", "0?machine:human")
> in new stack
>     -- Goto (dialout,talk,3)
>     -- Executing [talk at dialout:3] Goto("Zap/1-1", "dialout-human|s|1")
> in new stack
>     -- Goto (dialout-human,s,1)
>     -- Executing [s at dialout-human:1] NoOp("Zap/1-1", "Dialout to Human")
> in new stack
>     -- Executing [s at dialout-human:2]
> Playback("Zap/1-1","/tmp/asterisk-recording") in new stack
>     -- Playing '/tmp/asterisk-recording' (language 'en')
>     -- Executing [s at dialout-human:3] Wait("Zap/1-1", "1") in new stack
>     -- Executing [s at dialout-human:4] Playback("Zap/1-1", "vm-goodbye")
> in new stack
>     -- Playing 'vm-goodbye' (language 'en')
>     -- Executing [s at dialout-human:5] Hangup("Zap/1-1", "") in new stack
>   == Spawn extension (dialout-human, s, 5) exited non-zero on 'Zap/1-1'
>     -- Hungup 'Zap/1-1'
> [Feb  8 13:29:37] NOTICE[32512]: pbx_spool.c:351 attempt_thread: Call
> completed to Zap/1/1234567
>
> Thanks for any ideas on this!
>
> Alvin
>
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