Check the listing for details. Andrea PCTI -3 way Personal Computer Telephone Interface. Condition: New. Listed at 19.99 USD. Andrea PCTI -3 way Personal Computer Telephone Interface. Condition is New. Shipped with USPS Priority Mail. DescriptionPersonal Computer Telephone Interface. Andrea Communications' audio accessories are designed with the needs of our customers in mind. Enhancing the audio experience for our customers is the goal. Product Features:3-way switching of a headset to a PC, a phone, or both.Enabling headset users to connect to their PCs and their telephones simultaneously to allow voice-enabled computing and telecommunications functions easily and efficiently.Connects a PC headset to most telephones (both single line and digital PBX) and to a PC.3-way conferencing in position allows person on headset, person on phone, and person VoIP through computer all to communicate simultaneously.Use the headset while on the phone instead of the phone handset.Use the headset with the PC for speech recognition, VoIP, or any PC audio output.Single control point for flexible connections without plugging and unplugging cables, including:Select handset or headsetAdjust headset speaker volumeMute headset microphoneControl Computer Speakers (On / Off)Select PC, Phone or Both