Is the HDL300 system compatible with Poly® RealPresence® Group 500?

Nureva® Console client
Last Updated: August 16th, 2021

Yes. To connect the HDL300 system with the Poly RealPresence Group 500, two custom cables are needed.

Creating custom cables

Cable 1: Prepare a 3-conductor 3.5 mm jack cable with the three pins, positive (+), negative () and ground (), as described in the Nureva auxiliary port recommendations.

Cable 2: Prepare a second 3-conductor 3.5 mm jack cable with the three pins, positive (+), negative () and ground (), as described in the Nureva auxiliary port recommendations.

On your PC

  • Connect a USB-A to USB-B cable from a laptop to the connect module
  • Download and run Nureva Console client
  • Register the HDL300 system following the on-screen instructions
    • From the left-hand menu, select System Information
    • If a firmware update is available, click on Update
  • In Nureva Console client, under
    • Device settings
    • Auxiliary ports
      • Change to Mic level
      • Ensure Sleep Mode is set to Off
  • Disconnect the connect module from your laptop and remove the USB cable.

On the connect module

  1. Plug Cable 1 into the Aux out port
  2. Plug Cable 2 into the Aux in port
  3. Connect the PoE cable (provided) to the RJ45-1 port on the connect module to the rear RJ45 port on the HDL300 system
  4. Plug in the 54VDC power supply

On the Poly RealPresence device

  1. Plug Cable 1 into the audio Input 3.5 mm stereo line level
  2. Plug Cable 2 into the audio Output 3.5 mm stereo line level
  3. Connect the Polycom Group 500 to the network using the LAN port
  4. Connect the power supply as described in the Polycom user manual

Follow the steps below to configure a Poly Realpresence Group 500 system with the HDL300 system using a direct connection to the Audio input 1 port:

  1. Open the Polycom web interface
  2. Go to Admin Settings → Audio/Video/Content → Audio → Audio Input

  1. Enable "Use 3.5 mm Input for Microphone"
  2. Disable "Echo Canceler." The HDL300 system provides like-out echo-cancellation.
  3. Adjust the input level using the gain slider. Test the adjustments in a test call.

Additionally, make sure the following Polycom features are disabled:

         Automatic gain control
Instant adaptation echo cancellation
         Automatic noise suppression
Audio error concealment
         Keyboard noise reduction
Polycom Siren™ Lost Packet Recovery
        Polycom NoiseBlock™ technology
Polycom Stereo Surround™ technology
         Polycom Acoustic Fence™
Activelip synchronization
         Live music mode
Instant adaptation echo cancellation

Connection Diagram

NOTE: The Nureva Aux In / Out connections are single-ended, unbalanced signals with default maximum output signals as given in the table below. Any equipment requiring voltages below these levels may result in clipping, distortion and, in extreme cases, damage to connected systems. Equipment requiring voltages above these levels will not be adequately driven by the HDL300 system’s output signal and may result in quiet / no audio on the channel. Before connecting to the Nureva Connect Module, make sure the third-party device voltage levels are adequate or adjusted properly by additional interfacing hardware.



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