Additional Details ------------------------------ Product description: The CALLMASTER IV voice terminal (also known as the Lucent Definity Callmaster IV ACD Turret) is a digital PBX switchboard designed for use with an Avaya/Lucent Definity/Callmaster Media Server. This voice terminal has six buttons that can be used for either call appearances or features and 15 buttons that are administered exclusively for features. It also has a 2-line by 40-character liquid crystal display for showing call-related information, and designated buttons for both the ACD Log In and Release features. In addition, the CALLMASTER IV has a built-in Recorder Interface which allows you to connect the voice terminal to a recording device so that you can record voice interactions. The CALLMASTER IV voice terminal is most often used with a headset, and each set has two headset jacks, one on each side of the housing.