Call file 開發範例

SHELL(bash)

shell 是所有 Linux 發行版都會內建的腳本語言，無須另外安裝，使用方便。

#!/bin/bash
# Usage: busy_callback.sh <call from> <call to>
# example: ./busy_callback.sh 202 201
#
if [ $# -ne 2 ]; then
        exit;
fi
extFROM="$1"
extTO="$2"
custEXT="custom-auto-redial"
MR=18 #Max Retries
RT=10 #Retry per 10 seconds

#
echo Channel: Local/rd$extFROM$extTO@$custEXT > /tmp/$extFROM.redial
echo MaxRetries: $MR >> /tmp/$extFROM.redial
echo RetryTime: $RT >> /tmp/$extFROM.redial
echo WaitTime: 15 >> /tmp/$extFROM.redial
echo Context: from-internal >> /tmp/$extFROM.redial
echo Extension: $extTO >> /tmp/$extFROM.redial
#echo Priority: 1 >> /tmp/$extFROM.redial
echo CallerId: ReDial\<$extFROM\> >> /tmp/$extFROM.redial

chown asterisk:asterisk /tmp/$extFROM.redial
sleep 3
mv /tmp/$extFROM.redial /var/spool/asterisk/outgoing

 Macro for Asterisk

Asterisk 的巨集範例，以下巨集內容可以寫在 /etc/asterisk/extensions.conf 設定檔內。

[macro-createfile]
;  {ARG1} Number to Dial    0312341234
;  {ARG2} Device/Trunk    SIP/VSP_Name
;  {ARG3} Context        from-internal
;  {ARG4} CallerID        "Name" <number>
exten => s,1,Set(NumToCall=${ARG1})
exten => s,n,System(echo Channel: ${ARG2}/${NumToCall} > /tmp/${NumToCall})
exten => s,n,System(echo CallerID: ${ARG4} >> /tmp/${NumToCall})
exten => s,n,System(echo MaxRetries: 0 >> /tmp/${NumToCall})
exten => s,n,System(echo RetryTime: 120 >> /tmp/${NumToCall})
exten => s,n,System(echo WaitTime: 20 >> /tmp/${NumToCall})
exten => s,n,System(echo Context: ${ARG3} >> /tmp/${NumToCall})
exten => s,n,System(echo Extension: ${NumToCall} >> /tmp/${NumToCall})
exten => s,n,System(echo Priority: 1 >> /tmp/${NumToCall})
exten => s,n,System(echo sleep 15 > /tmp/${NumToCall}.2)
exten => s,n,System(echo mv /tmp/${NumToCall} /var/spool/asterisk/outgoing >> /tmp/${NumToCall}.2)
exten => s,n,System(chmod 775 /tmp/${NumToCall}.2)
exten => s,n,System(/tmp/${NumToCall}.2 &)
exten => s,n,Hangup

在自定的context或Dialplan都可以呼叫此巨集，簡單的範例可以這樣寫：

; Accepted Call Back Numbers
exten => DID/CID,1,Macro(createfile,CID,SIP/GoTalk,callback,CID-Display)
exten => DID/CID,n,HangUp

Morning Call 應用

這是飯店常見的電話提醒服務。

[hotel-intern]
exten => _*77*XXXXXXXXXXXX,1,Answer()
exten => _*77*XXXXXXXXXXXX,n,Set(year=${EXTEN:4:4})
exten => _*77*XXXXXXXXXXXX,n,Set(month=${EXTEN:8:2})
exten => _*77*XXXXXXXXXXXX,n,Set(day=${EXTEN:10:2})
exten => _*77*XXXXXXXXXXXX,n,Set(hours=${EXTEN:12:2})
exten => _*77*XXXXXXXXXXXX,n,Set(minutes=${EXTEN:14:2})
exten => _*77*XXXXXXXXXXXX,n,NoOp(Wake-up call scheduled for ${CALLERID(num)} at ${hours}:${minutes} on ${day}.${month}.${year}.)
exten => _*77*XXXXXXXXXXXX,n,System(echo -e "Channel: SIP/${CALLERID(num)}\\nContext: wake-up\\nExtension: 23" > /tmp/${UNIQUEID}.call)
exten => _*77*XXXXXXXXXXXX,n,System(touch -t ${year}${month}${day}${hours}${minutes} /tmp/${UNIQUEID}.call)
exten => _*77*XXXXXXXXXXXX,n,System(mv /tmp/${UNIQUEID}.call /var/spool/asterisk/outgoing/)
exten => _*77*XXXXXXXXXXXX,n,Playback(rqsted-wakeup-for)
exten => _*77*XXXXXXXXXXXX,n,SayNumber(${hours})
exten => _*77*XXXXXXXXXXXX,n,SayNumber(${minutes})
exten => _*77*XXXXXXXXXXXX,n,Hangup()

[wake-up]
exten => 23,1,Answer()
exten => 23,n,Wait(1)
exten => 23,n,Playback(this-is-yr-wakeup-call)
exten => 23,n,Wait(1)
exten => 23,n,Hangup()

延伸閱讀

1. Digium Document - callfiles
2. Voip-info :: Asterisk Call Files
3. Voip-info :: Asterisk auto-dial out deliver message