premise_server.rb

require 'rubygems'
require 'eventmachine'

 module DigitCollector
   def post_init
     puts "-- someone connected to the echo server!"
   end

   def receive_data data
     p ">>>you sent: #{data}"
     close_connection if data =~ /quit/i
   end

   def unbind
     puts "-- someone disconnected from the echo server!"
   end
 end

 EventMachine::run {
   EventMachine::start_server "0.0.0.0", 4567, DigitCollector
 }

tropo_script.rb

require 'socket' 
client = TCPSocket.new('sandite.orl.voxeo.net', 4567)  
 
active_call = true
options = { :choices => '1,2,3,4,5,6,7,8,9,0' }
 
answer
sleep 1

say 'Hello, and welcome to the Digit Collector'

while active_call do
  result = ask 'Please enter a digit, using zero to exit.', options
  if result.value == '0'
    active_call = false
  else
    client.puts result.value
    say "You entered #{result.value}."
  end
end
 
say 'Thank you, goodbye.'
 
client.close
hangup