Cisco IP Phone 7821 Quick Start Guide UNIS Tech Support Office1Last Updated in December 2014CONTENTS1) Buttons and hardware .............................................................................................................. 22) Make calls................................................................................................................................ 33) Answer calls ............................................................................................................................ 44) Hold calls ................................................................................................................................. 45) Transfers a call ........................................................................................................................ 56) Mute phone .............................................................................................................................. 57) Voicemail ................................................................................................................................ 58) Forward all .............................................................................................................................. 69) Conference............................................................................................................................... 610) Call history .............................................................................................................................. 611) Corporate directories ............................................................................................................... 7