We have a fleet of IP501s and we're trying to get a Savi 700 Plantronics headset to work with EHS (Electronic Hook Switch). From what we can tell, the required cable is the APP-5, APP-50, or APP-51, with each one replacing the previous. So we got an APP-51 and hooked it up, but we can't find the Analog Headset option described here on page 3:
The document you linked list's the phones that support EHS (it is missing the newer VVX phones):
The headsets listed next support electronic hookswitch on SoundPoint IP phone models 320, 321, 330, 331, 335, 430, 450, 550, 560, 650, and VVX 1500 phones.
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Polycom Global Services
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