The Avaya Partner 18 Telephone is a feature-rich VoIP phone. It has 16 programmable buttons with dual LEDs, allowing for line or feature appearances. It also has built-in conference, transfer, hold, and speaker buttons, as well as a full duplex speakerphone for hands free operation. A built-in port allows for connection of standard devices, such as modems or fax machines, making it a great choice for a wide range of businesses.