[local_calls]
exten => s,1,chanisavail($ARG2)
exten => s,2,dial($ARG1/$ARG2)
exten => s,102,playtones(congestion)
exten => s,103,wait(2)
exten => s,104,macro(long_distance,$ARG1,iax2/nufone)

[long_distance]
exten => s,1,chanisavail($ARG2)
exten => s,2,setcallerid(<9735898454>)
exten => s,3,dial($ARG1/$ARG2)
exten => s,102,playtones(congestion)
exten => s,103,wait(2)
exten => s,104,macro(local_calls,$ARG1,zap/g1)