Being that the Plantronics C052 isn't Bluetooth and doesn't connect with your computer, there's a simple fix!
You can purchase a USB wireless headset if you choose or you can get the accessory below which will connect your C052 (CS510 or CS520) to a computer.
Reference this video for setup
You'll see the model in this video isn't identical to your Plantronics C052 but it connects the same way.
1. Included with your C052 is a phone cord, plug this cord into the square box of the D315.
2. Plug the other end of the D315 adapter into your computer, wait for the drivers to download and you'll now be able to use your Plantronics C052 on your computer.
Before your decision, consider this
The future of communications will be done on a number of devices like desk phones and computers. You can get the D315 adapter to go with your C052. Or you may want to consider upgrading your headset with one like the Discover D904 that connects to both devices out of the box to keep you protected for your needs today and in the future.