These Polycom Soundpoint IP300 Series telephones require this lead because they have a 2.5mm headset jack. The rest of the Soundpoint Seires Have RJ11 Headset Sockets so do not require this adapter.
This adapter is required to connect these SoundPoint IP300 Series telephones with the Plantronics CS60, Plantronics CS70N, Plantronics CS351N, Plantronics Cs361N cordless headsets.Note:
The Polycom Soundpoint IP 335 does not require this adapter.
The Plantronics RJ11-2.5mm Adapter works on the following Polycom Phones
|Manufacturer Part #||78333-01|
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