call_handler = require('seem') ->
  caller = @data['Channel-Caller-ID-Number']
  callee = @data['Channel-Destination-Number']
  new_caller = yield db.getAsync "new_caller_for_#{caller}"
  yield @command 'answer'
  yield @command 'play-file', 'voicemail/vm-hello'
  yield @command 'set', "effective_caller_id_number=#{new_caller}"
  yield @command 'bridge', "sofia/egress/#{callee}@example.net"

require('esl').server(call_handler).listen(7000)