Panasonic KX-T7630-B Business Phones KX-T76303 Line LCD Display. Speaker phone 24 Programmable Buttons XDP Feature Works with Panasonic KX TDA phone systems. The Panasonic KX T7630 is a digital proprietary telephone with 24 buttons, and 3 line display for the Panasonic KXTDA phone systems. This fully duplex speakerphone ensures that the conversation will flow both ways without clipping. The 24 line keys can be programmed to the users preference and can show other extensions on the Panasonic