Someone

[general]
static=yes
writeprotect=no
clearglobalvars=no
OUTBOUND=Zap/2
LOCAL1=Zap/3
LOCAL2=Zap/4
SNOM=SIP/Snom

[incoming]
exten => s,1,Answer()
exten => s,n,Playback(hello-world)
exten => s,n,Hangup()

[outbound]
exten => _9NXXXXXXXXX,1,Dial(Zap/2/${EXTEN:1})
exten => _9NXXXXXXXXX,n,Congestion()
exten => _9NXXXXXXXXX,n,Hangup()
exten => _81NXXXXXXXXX,1,Dial(Zap/2/${EXTEN:1})
exten => _81NXXXXXXXXX,n,Congestion()
exten => _81NXXXXXXXXX,n,Hangup()

[office]
exten => _7XX,1,Dial(Zap/2/${EXTEN:1})

[local]
include => demo
include => outbound
include => office
exten => 300,1,Dial(${GLOBAL(LOCAL1)})
exten => 301,1,Dial(${GLOBAL(LOCAL2)})
exten => 302,1,Dial(${GLOBAL(SNOM)})

[default]