PC Based Programming. Panasonic dealers can program telephone systems with an IBM-compatible computer. The data can then be stored on disk for safe, secure back-ups. (Available on the KX-TD308, KX-TD816 and KX-TD1232). Automatic Route Selection. Automatically routes outgoing calls to the most cost-efficient long distance carrier within your network based on time-of-day, day-of-week and call destinations. (Available on the KX-TD308, KX-TD816 and KX-TD1232).