Home | End Users Hub | Phones and Voicemail | Poly Trio 8300 IP Conference Phone Phones & Voicemail Hub To start, please Select from the categories listed below: Poly Trio 8300 Trio Buttons and Hardware Placing Calls Answering Calls Placing Calls On Hold Setting Up Your Default Transfer Type Performing Blind Transfer Performing Consulted Tranfser DND Muting a Call Adjusting Speaker and Ringer Volume Poly Trio 8300