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Want to use a Trio 8500 or VoxBox as a public VoIP speakerphone? Get an official Polycom secure USB 2.0 cable for your Polycom Trio 8500 conference phone or Polycom VoxBox speakerphone. This 4ft long USB 2.0 cable is a Micro-B/male to Type A/male connector with Torx security screws to make sure your Polycom devices stay put.