Mitel MiVoice 5320 IP System Telephone - RefurbishedA full feature enterprise phone with 8 multiple function programmable keys, 12 fixed function keys and an incorporated HTML compatible display screen the Mitel proves its simple design and improved user value. Other features includes transfers, on hook dialing, speed calling and conference calls. The Mitel 5230 is a diverse telephone that can be use by executive and employees alike, it can also be used as an ACD agent, teleworker and supervisor phone.