Bullhorn Applicant Tracking System Rest API integration request. I spoke to Bullhorn and was told that Ring Central needs to request the integration on their marketplace site. Your competitors already have the integration.
A Bullhorn-RingCentral integration is possible with third party CTI tools like Tenfold. A free trial of the integration software is available on RingCentral's marketplace too. Very efficient in tracking and logging each and every call that comes in and goes out.