Make and receive calls on two different phone lines with the AT&T ML17929 2-Line Corded Speakerphone. This phone is caller ID and call waiting capable and has a 100 name-and-number phonebook directory. An 18-number speed dial function lets you stay in quick contact while selectable ringer tones help you identify incoming calls. Three-way conversations and chain dialing provide added efficiency. Hold, mute and line status indicators ensure this speaker phone is a practical addition to any office.