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Plantronics currently ships direct to consumer only to the United States, United Kingdom, Germany, France, Italy, Finland, Netherlands, Spain, and Australia.

APP-5/APP-50/APP-51 (Polycom EHS Cable): How to Install

Article ID : 000001196

This procedure explains how to install the APP-5/APP-50/APP-51 EHS cable, which is compatible with the following Polycom phone models:
  • SoundPoint IP 320/321
  • SoundPoint IP 330/331
  • SoundPoint IP 430
  • SoundPoint IP 550
  • SoundPoint IP 560
  • SoundPoint IP 650
  • SoundPoint IP 670
  • VVX 1500
  • VVX 400 


Software Requirements
All of the phone models must run SIP application 3.1 or higher and BootROM 4.1.0 or later, except for the SoundPoint IP 670, which must SIP application 3.0.2 or higher and BootROM 4.1.0 or later.
Phone Settings
Set the headset mode on your phone to "Plantronics Mode" before connecting your Plantronics headset system to your phone. To do so,
  1. Press Menu.
  2. Select Settings > Basic > Preferences > Headset > Analog Headset.
  3. Select Plantronics Mode, and then press Select.
Additional Adapter Required
The following phone models require an adapter (Part Number 2200-11095-002; available from Polycom) for the 2.5mm headset port:
  • SoundPoint IP 320/321
  • SoundPoint IP 330/331
Click here for adapter installation information.
To Install the EHS Cable
  1. On your base, set your compatibility switch and speaking and listening volumes to the following:
    Setting CS50/CS55/CS70/CS70N/ CS351N/CS361N
    Cable APP-5
    CS500 Series
    Cable APP-50 or APP-51
    Savi Office/700 Series
    Cable APP-50 or APP-51
    Compatibility 1 A A
    Speaking Volume A 2 2
    Listening Volume 2 3 3
      Image of Settings Image of Settings Image of Settings
  2. Connect your EHS cable to your phone as follows:

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