3901 digital deskphone (entry level), single-line entry-level phone is perfect for locations such as lobbies or reception areas, cafeterias, hallways, and other areas where telephone use is occasional. It supports up to five programmable features, and is particularly optimized for auto dial. A convenient feature card identifies features and auto dial numbers. 3900 series digital deskphone series is designed to protect your investment by keeping the future in mind as the portfolio continues to evolve, offering enhanced.