Stuff

[default]
include => trunktollfree
include => les

[trunktollfree]
exten => _1800NXXXXXX,1,Dial(IAX2/someplace/0${EXTEN})
exten => _1888NXXXXXX,1,Dial(IAX2/someplace/0${EXTEN})
exten => _1866NXXXXXX,1,Dial(IAX2/someplace/0${EXTEN})
exten => _1877NXXXXXX,1,Dial(IAX2/someplace/0${EXTEN})

[les]
exten => _1XXXXXXXXXX,1,Set(CALLERID(all)=WE R NICE <9143733793>)
exten => _1XXXXXXXXXX,2,Dial(SIP/lesnet/${EXTEN})
exten => _1XXXXXXXXXX,3,Congestion