There is a very useful PDF guide on setting up Plantronics, Jabra and Sennheiser wireless EHS headsets with Polycom phones here:
You need to have bought the relevant EHS cable for Polycom phones and the headset you are using. We can source these cables, please give our sales people a call.
Two things I noticed when testing:
- If you have a Polycom IP321 or IP331 phone then you need an rj9-2.5mm jack convertor (when using a Sennheiser headset at least). We can sell you this, part code is RJ9-2.5MM-5PK. This goes between the rj9 connector on the EHS adaptor and the 2.5mm jack headset port on the phone.
- The PDF tells you to go into these menus on the phone:
Menu > Settings > Basic > Preferences > Headset > Analog Headset
On the phone I used which was on 4.1.0 firmware the actual menu sequence was:
Menu > Settings > Basic > Preferences > Headset > Hookswitch Mode
Make sure to pay attention to the headset mode settings on the headset itself by turning the dial(s) or DIP switch as per the Polycom PDF.