## Adhearsion output
 INFO agi: Handling call with variables {:priority=>1, :network=>true, :callingani2=>0, :callerid=>15056, :channel=>"SIP/172.19.128.199-099c2920", :accountcode=>"", :language=>"en", :uniqueid=>1226422830.2, :enhanced=>0.0, :request=>#<URI::Generic:0xfdbe497fa URL:agi://127.0.0.1>, :dnid=>18758, :callingpres=>0, :query=>{}, :calleridname=>"W.SANCHEZ-IS-1ST-CHEVY", :type=>"SIP", :callingtns=>0, :rdnis=>nil, :context=>"incoming", :extension=>18758, :type_of_calling_number=>:unknown}

## dialplan.rb
incoming {
  case extension
   when 18758 #(Call Manager Trunk.. internal extension 18758)
     play %w'auth-thankyou vm-goodbye'
   else
     hangup #how the heck did you get here?!
  end
}