[from-pstn] exten => s,1,Wait(1) ; exten => s,n,Answer exten => s,n,Dial(SIP/1000) exten => s,n,Hangup [from-pstn-3] exten => s,1,Wait(1) ;exten => s,n,Answer exten => s,n,Dial(SIP/1000) exten => s,n,Hangup [from-pstn-4] exten => s,1,Wait(1) exten => s,n,Answer exten => s,n,Dial(SIP/1000) exten => s,n,Voicemail(1000,u) exten => s,n,Hangup