If you spend a lot of time on the phone then I believe that you need a proper headset. Many headsets require some form of interface hardware to connect to a desk phone. Many IP phones, like my Polycom Soundpoint IP series, require the use of an “Electronic Hook-Switch” (aka EHS) cable or a mechanical lifter.
A mechanical lifter is a Flintstone-like approach to hook switch control by purely mechanical means. It literally lifts the handset to take the phone off-hook, replacing it down again to hang up the call. To me this is essentially a kind of telephony steam punk.
Moving to 21st century methods, an EHS cable allows some aspect of the headset to control the hook state of the phone electrically. That is, it allows you to answer or hang up a call using switching that’s built into the headset. This may be true with both wired and wireless headsets.
To be blunt, lifters and EHS cables just aren’t cheap. The few times that I’ve had to buy an EHS cable it cost in the $50 – $80 range. That’s a considerable price when compared to the cost of the headset or the desk phone itself.