The phone has 12 lines for moderate to high call volume and HD voice1 for superior sound quality. Patented acoustic technology provides echo-free and crystal-clear conversations. The Presence feature of this phone allows the user to monitor the in-use status of up to 10/502 other users. The intuitive user interface makes usability and navigation easy and requires minimal training. Its two-port gigabit Ethernet switch allows a single drop to the desktop for high-speed connection to both phone and computer.