exten => 6,1,Playback(ihelpdeskq28d)
exten => 6,2,Set(CALLERID(num)=0${CALLERID(num)})
exten => 6,3,AGI,mail_notify.pl|${CALLERIDNAME}|${CALLERIDNUM}
exten => 6,4,Dial(SIP/4304,5,twW)
exten => 6,5,Queue(helpdesk|tThHn|56)
exten => 6,6,Dial(SIP/4304,12,twW)
exten => 6,7,Queue(helpdesk|tThHn|50)
exten => 6,8,Voicemail(u1)