asterisk 三方通话

[app-chanspy-custom]
exten => _*54.,1,system(/var/lib/asterisk/agi-bin/toqc.php 0 ${EXTEN:3} &)
exten => _*54.,2,Read(hhh,custom/pingjia,1,,2,10))
exten => _*54.,3,Playback(custom/pingjiajiesu)
exten => _*54.,4,system(/var/lib/asterisk/agi-bin/toqc.php ${hhh} ${EXTEN:3} &)
exten => _*54.,5,playback(auth-thankyou)
exten => _*54.,6,Hangup()
exten => i,1,Playback(thankyou)
exten => i,2,Hangup()


exten => _*55.,1,Macro(user-callerid,)
exten => _*55.,n,Answer
exten => _*55.,n,Wait(1)
exten => _*55.,n,ChanSpy(SIP/${EXTEN:3},q)
exten => _*55.,n,Hangup


exten => _*56.,1,Macro(user-callerid,)
exten => _*56.,n,Answer
exten => _*56.,n,Wait(1)
exten => _*56.,n,ChanSpy(SIP/${EXTEN:3},w)
exten => _*56.,n,Hangup

/**三方通话**/
exten => _*57XX.,1,Macro(user-callerid,)
exten => _*57XX.,n,Answer
exten => _*57XX.,n,Wait(1)
exten => _*57XX.,n,ChanSpy(SIP/${EXTEN:3},Bw)
exten => _*57XX.,n,Hangup