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Across
  1. 4. I have multiple keys but can't make music note, guess me
  2. 5. To Check if you are able to reach a Host through the Network you issue this Command
Down
  1. 1. In India, Who first implements VoIP in handset
  2. 2. I am common in Java and Coffee
  3. 3. Name the open source UNIX based OS to configure router with the help of software in its base system