[default]
exten => h,1,NoOP()

[justin-phones]
exten => 3000,1,Dial(SIP/3000,20)
exten => 3001,1,Dial(SIP/3001,20)
include default
include => blah

[blah]

exten => 111,1,BLAHBLAHBLAH
exten => h,1,Playback(blah)