忙線回撥-Busy CallBack

內容異動

• 2009-04-30 修改extensions.conf 使語音"分機忙線中，如要預約，請按5" 在未輸入任何數字前可語音提示三次。
• 2009-04-30 更改提示語音的內容，並重錄製語音檔。

功能操作流程

當 A 撥電話給 B 時
A分機 -> B分機(忙線中) -> A 聽到語音提示：分機忙線中，如要預約，請按 5 -> A 按下 5 -> A 聽到語音提示：功能確定請掛上電話 -> A 掛斷電話(等待回撥)

當 B 講完電話時
系統自動回撥至 A分機 -> A 接起電話 -> 系統主動撥給 B分機 -> B 接起電話後與 A 通話

使用的限制

• 設定忙線回撥的分機，不可啟用 Voicemail 或 FollowMe。
• 此教學需要修改 extensions.conf 設定檔，如果有使用 FreePBX 套件，在作完套件升級後，部份修改的內容可能會遺失。

檔案說明

/etc/asterisk/extensions.conf
紅字區域是原始內容，將它們全部註解。

; Extensions with no Voicemail box reporting BUSY come here
;exten => s-BUSY,1,NoOp(Extension is reporting BUSY and not passing to Voicemail)
;exten => s-BUSY,n,Playtones(busy)
;exten => s-BUSY,n,Busy(20)

; The following is written by A.Lang
exten => s-BUSY,1,NoOp(Extension is reporting BUSY and set automatical CallBack)
exten => s-BUSY,2,ChanIsAvail(SIP/${MACRO_EXTEN}|s)
exten => s-BUSY,3,GotoIf($["${AVAILSTATUS}"<="1"]?s-NOANSWER,1)
exten => s-BUSY,4,Read(digit|busy-callback|1|i|3) ;Playback "busy-callback" before press digits and 3 attempts will be made.
exten => s-BUSY,5,GotoIf($["${digit}"="5"]?s-busy-callback,1 ;press 5 enable CallBack
exten => s-BUSY,6,Hangup

exten => s-busy-callback,1,AGI(busy_callback.sh,${CALLERID(number)},${MACRO_EXTEN})
exten => s-busy-callback,2,Playback(busy-callback-ok)
exten => s-busy-callback,3,Hangup 

/etc/asterisk/extensions_custom.conf

[custom-auto-redial]
exten => _rdXXXXXX,1,NoOp(Redialed Call)
exten => _rdXXXXXX,2,Set(FROM=${EXTEN:2:3})
exten => _rdXXXXXX,3,Set(TO=${EXTEN:5:3})
exten => _rdXXXXXX,4,ChanIsAvail(SIP/${TO}|s)
exten => _rdXXXXXX,5,GotoIf($["${AVAILSTATUS}" <= "1"]?6:end)
exten => _rdXXXXXX,6,Set(CALLERID(all)="ReDial ${TO} <${TO}>")
exten => _rdXXXXXX,7,Dial(SIP/${FROM}|10)
exten => h,n(end),Hanghup

* 此範例僅適用以3位數字編碼的分機；如果是4位數的分機，部份內容修改如下：
_rdXXXXXX                         -->  _rdXXXXXXXX
Set(FROM=${EXTEN:2:3})    --> Set(FROM=${EXTEN:3:4})
Set(TO=${EXTEN:5:3})        --> Set(TO=${EXTEN:7:4}) 

/var/lib/asterisk/agi-bin/busy_callback.sh

#!/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

別忘了要加上可執行的權限
#>chmod 755 busy_callback.sh

;MR=18,RT=10 每10秒檢查一次，最多檢查18次

參考連結

• http://www.voip-info.org/wiki/view/A...tips+Call+Back