You can use a USB headset for your calls if your phone has a USB port.
For a list of phones that support USB headsets, see https://help.webex.com/docs/DOC-14171.
For a list of supported headsets, see http://www.cisco.com/c/en/us/products/unified-communications/uc_endpoints_accessories.html. USB headsets that are not listed may not function properly when attached to the USB port. For more information, see the documentation from your USB headset manufacturer.