Something

; Extensions configuration for Asterisk
[general]
static=yes
writeprotect=yes
[globals]
; Define global variables here
PHONE1=SIP/1000
PHONE2=SIP/2000
TRUNK=Zap/g2
TRUNKMSD=1

[internal]
include => local-sip
include => trunkld
include => trunklocal
include => tollfree

[local-sip]
exten => 1000,1,Dial(${PHONE1},40,t)
exten => 1000,2,Hangup

exten => 2000,1,Dial(${PHONE2},40,t)
exten => 2000,2,Hangup

[from-pstn]
exten => s,1,Answer			; Answer the line
exten => s,2,Dial(SIP/1000)
exten => s,3,Hangup

;exten => 2000,1,Dial(${PHONE2},40,t)
;exten => 2000,2,Hangup

[dialout]
Dial Zap/g2/${EXTEN}

[trunkld]

exten => _91NXXNXXXXXX,1,Dial(Zap/g2/${EXTEN:1})

[trunklocal]

exten => _9NXXXXXX,1,Dial(Zap/g2/${EXTEN:1})

[trunktollfree]

exten => _91800NXXXXXX,1,Dial(Zap/g2/${EXTEN:1})
exten => _91888NXXXXXX,1,Dial(Zap/g2/${EXTEN:1})
exten => _91877NXXXXXX,1,Dial(Zap/g2/${EXTEN:1})
exten => _91866NXXXXXX,1,Dial(Zap/g2/${EXTEN:1})