InfoComm 2019: Jacob Blount Talks to Hanjie Gao & Leo Chan of Yealink About UC Hardware and Software June 17, 2019 | Home / June 17, 2019 rave-video / InfoComm 2019: Jacob Blount Talks to Hanjie Gao & Leo Chan of Yealink About UC Hardware and Software InfoComm 2019: Jacob Blount Talks to Hanjie Gao & Leo Chan of Yealink About UC Hardware and Software