Polycom model 650 and 670 phones have a USB on the back to allow In call recording.
I can get a 670 to make calls in and out. Per the documentation a call record button should appear. I'm using one of the recommended USB flesh drive per polycom.
No buttons appears and The phone doesn't see the USB drive.
Boot ROM 4.3.1
SIP Ver 3.3.2
The Polycom 650 requires a license key to be applied to the phone to activate the feature in the phone.
At one time this was a paid license per phone or per site but I think Polycom has it available for download for free.
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