If anybody is interested in hooking up an excellent wireless headset to a Polycom phone, I personally have a Plantronics CS-361N w/ a HL10 on my Polycom IP650 and it works GREAT! Here is the link:
Plantronics SupraPlus CS361N-HL10
However - you need to get this accessory so your Polycom handset doesn't fall off after your lifter answers the call:
Plantronics Polycom IP Lifter Accessory
The double headset and noise reduction features make this headset better for me than the single ear style, but that is personal preference. So Basically, any of the
Plantronics Lifters will work with the
Polycom VoIP Phones as long as you have that little accessory.....
Cheers,
John